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  • Lecture

    Adventures in the Critical Zone: from carbon fluxes to wildfires

    Date: Tuesday, February 2, 2021 Hour: 10:00
    Speaker: Antonello Provenzale
    Share the event Adventures in the Critical Zone: from carbon fluxes to wildfires on email Add the event Adventures in the Critical Zone: from carbon fluxes to wildfires to calendar
    Contact: dalia.madhala@weizmann.ac.il
    Zoom meeting on https://weizmann.zoom.us/j/7621438333?pwd=c0lpdlQzYSthellXWG9rZnM0ZDRFZz09
  • Lecture

    Styles and rates of landscape evolution away from tectonic-plate boundaries: examples from southern Africa

    Date: Tuesday, February 16, 2021 Hour: 10:00
    Speaker: Shlomy Vainer
    Share the event Styles and rates of landscape evolution away from tectonic-plate boundaries: examples from southern Africa on email Add the event Styles and rates of landscape evolution away from tectonic-plate boundaries: examples from southern Africa to calendar
    Contact: dalia.madhala@weizmann.ac.il
    Zoom meeting on https://weizmann.zoom.us/j/7621438333?pwd=c0lpdlQzYSthellXWG9rZnM0ZDRFZz09
  • Lecture

    TBA

    Date: Tuesday, March 2, 2021 Hour: 16:00
    Speaker: Kevin Uno, Lamont-Doherty Earth Observatory Columbia University
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    Contact: dalia.madhala@weizmann.ac.il
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  • Lecture

    Marine electrical imaging reveals novel freshwater transport mechanism in Hawaiʻi

    Date: Tuesday, January 26, 2021 Hour: 11:00
    Speaker: Eric Attias , Hawaiʻi Institute of Geophysics and Planetology University of Hawaiʻi
    Abstract: Conventional hydrogeologic models employed to compute ocean island sustainable yields and aquifer storage neglect the nearshore and onshore submarine environment’s complexity. Ho read more »Continue read abstract
    Abstract: Conventional hydrogeologic models employed to compute ocean island sustainable yields and aquifer storage neglect the nearshore and onshore submarine environment’s complexity. However, the onshore aquifer at the island of Hawaiʻi exhibits a significant volumetric discrepancy between high-elevation freshwater recharge and coastal discharge. This study presents a novel transport mechanism of freshwater moving from onshore to onshore via a multilayer formation of water-saturated layered basalts with interbedded low-permeability layers of ash/soil, as revealed by marine-controlled source electromagnetic (CSEM) imaging. We propose that this newly discovered transport mechanism of fresh water may be the governing mechanism in other volcanic islands. Additionally, our water column CSEM imaging detects multiple vertical freshwater plumes extending from the seafloor to the ocean surface. These findings provide valuable information to elucidate hydrogeologic and oceanographic rocesses affecting biogeochemical cycles in coastal waters worldwide. Close abstractClose abstract
    Share the event Marine electrical imaging reveals novel freshwater transport mechanism in Hawaiʻi on email Add the event Marine electrical imaging reveals novel freshwater transport mechanism in Hawaiʻi to calendar
    Contact: dalia.madhala@weizmann.ac.il
    Zoom meeting on https://weizmann.zoom.us/j/7621438333?pwd=c0lpdlQzYSthellXWG9rZnM0ZDRFZz09
  • Lecture

    In situ identification of 48-56.0 million old proteins in chert with unusually high stiffness

    Date: Tuesday, January 19, 2021 Hour: 11:00
    Speaker: Filipe Natalio , Scientific Archaeology Unit Weizmann Institute of Science
    Share the event In situ identification of 48-56.0 million old proteins in chert with unusually high stiffness on email Add the event In situ identification of 48-56.0 million old proteins in chert with unusually high stiffness to calendar
    Contact: dalia.madhala@weizmann.ac.il
  • Lecture

    Nanoinclusions in diamonds: trapped fluids and solid molecular N2 and CO2

    Date: Tuesday, January 5, 2021 Hour: 11:00
    Speaker: Oded Navon, Institute of Earth Sciences The Hebrew University of Jerusalem
    Abstract: Diamonds are perfect boxes for delivering samples of fluids and volatile species from the mantle to the surface. While mineral inclusions are often a few >30 micrometer in size and read more »Continue read abstract
    Abstract: Diamonds are perfect boxes for delivering samples of fluids and volatile species from the mantle to the surface. While mineral inclusions are often a few >30 micrometer in size and allow easy analysis, fluid inclusions are mostly <1 micrometer. Still, careful analysis allowed us to define carbonatitic, saline and silicic melts in the inclusions. Recently, transmission electron microscopy allowed us to look into even smaller inclusions, 10-30 nm in size where we found solid molecular nitrogen and solid molecular CO2. Contrary to the melts that are low volume mantle melts, the N2 and CO2 are interpreted as exsolutions of N and O atoms that were taken as single atoms in the diamond matrix and later migrated and joined to form tiny octahedrons full of N2 and CO2. Geologically, the solids are an oddity of nature, but the melts can play an important roll in the extraction of trace elements from the mantle and into the crust. Close abstractClose abstract
    Share the event Nanoinclusions in diamonds: trapped fluids and solid molecular N2 and CO2 on email Add the event Nanoinclusions in diamonds: trapped fluids and solid molecular N2 and CO2 to calendar
    Contact: dalia.madhala@weizmann.ac.il
    Zoom meeting on https://weizmann.zoom.us/j/7621438333?pwd=c0lpdlQzYSthellXWG9rZnM0ZDRFZz09
  • Lecture

    A coupled Eulerian-Lagrangian analysis of the large-scale tropical atmospheric circulation and its implication for climate change

    Date: Sunday, December 27, 2020 Hour: 11:00
    Speaker: Dana Reiter, Department of Earth and Planetary Sciences Weizmann Institute of Science
    Abstract: The Hadley circulation is a key element of the climate system. It is traditionally defined as the zonally averaged meridional circulation in the tropics, therefore treated as a zon read more »Continue read abstract
    Abstract: The Hadley circulation is a key element of the climate system. It is traditionally defined as the zonally averaged meridional circulation in the tropics, therefore treated as a zonally symmetric phenomenon. However, differences in temperature between land and sea cause zonal asymmetries on Earth, dramatically affecting the circulation. This longitudinal dependence of the meridional circulation evokes questions about where and when the actual large scale tropical circulation occurs. Here, we look into the connection between the longitudinally dependent meridional circulation, and the actual large scale transport of air in the tropics using a coupled Eulerian and Lagrangian approach. Decomposing the velocity field into rotational and divergent components, we identify how each component affects the actual circulation. We propose an alternative definition for the circulation, that describes the actual path of air parcels in the tropics, as a tropical atmospheric conveyor belt. We further investigate this definition, analyzing the circulation under climate change and its effect on precipitation changes. We show that in order to predict future climate, the regionality and three-dimensionality of the large-scale tropical circulation must be taken into account. We find that the changes in the circulation vary significantly over longitude, and are overlooked when analyzing the zonally averaged meridional circulation. The circulation is strengthening and expanding in the center of the Pacific, a region where the circulation barely existed in past. On the other hand, the circulation is weakening in the Indo-Pacific region, where it was the most significant in the past. These differences appear as a shift in the region of ascent of the conveyor belt, that is revealed when analyzing the decomposed vertical wind. The pattern of weakening of the ascent in the Indo-Pacific and strengthening in the center of the Pacific explains the projected changes in precipitation. The Indo-Pacific region is drying, while the precipitation in the center of the Pacific is intensifying. Close abstractClose abstract
    Share the event A coupled Eulerian-Lagrangian analysis of the large-scale tropical atmospheric circulation and its implication for climate change on email Add the event A coupled Eulerian-Lagrangian analysis of the large-scale tropical atmospheric circulation and its implication for climate change to calendar
    Contact: dalia.madhala@weizmann.ac.il
  • Lecture

    Reducing the Uncertainty of Extreme Weather and Climate Predictions

    Date: Tuesday, December 22, 2020 Hour: 11:00
    Speaker: Assaf Hochman , Department of Tropospheric Research, Institute of Meteorology and Climate Research Karlsruhe Institute of Technology, Eggenstein - Leopoldshafen
    Abstract: Weather and climate extremes such as cold spells, heat waves, heavy precipitation or windstorms have long been considered challenging to adequately predict a few days in advance. E read more »Continue read abstract
    Abstract: Weather and climate extremes such as cold spells, heat waves, heavy precipitation or windstorms have long been considered challenging to adequately predict a few days in advance. Even at shorter time scales, it is sometimes difficult to estimate the magnitude and impact area accurately. Therefore, they have been selected as one of the grand challenges by the World Climate Research Program. Several studies suggest that extreme temperatures or heavy precipitation events may become more frequent and more intense with climate change, making this topic even more pertinent. The ability to predict the development of any dynamical system (a system that evolves in time), depends on: 1) its persistence, meaning that a persistent system will be easier to predict and 2) the number of options the system can develop into/from, meaning that systems with a small number of options will be easier to predict. Recent advances in dynamical systems theory allow to efficiently compute these metrics from model data. Our earlier findings show that the dynamical systems metrics can serve as an extremely informative qualitative method for evaluating the predictability and dynamics of synoptic systems over the Eastern Mediterranean. The talk will discuss this novel dynamic approach and its recent applications in extreme weather forecasting, as well as in climate model projections over the Eastern Mediterranean. Close abstractClose abstract
    Share the event Reducing the Uncertainty of Extreme Weather and Climate Predictions on email Add the event Reducing the Uncertainty of Extreme Weather and Climate Predictions to calendar
    Contact: dalia.madhala@weizmann.ac.il
    Zoom meeting on https://weizmann.zoom.us/j/97705505483?pwd=QWhHV21YdGR2bmg5VFNEQTlmaStYQT09
  • Lecture

    Seismic sensing with optical fibers – principles and applications

    Date: Tuesday, December 8, 2020 Hour: 10:00
    Speaker: Ariel Lellouch, Stanford University
    Abstract: During the last decade, seismic sensing with optical fibers has become a reality. By analyzing the effect of seismic deformation on the fiber’s optical response, state-of-the-art read more »Continue read abstract
    Abstract: During the last decade, seismic sensing with optical fibers has become a reality. By analyzing the effect of seismic deformation on the fiber’s optical response, state-of-the-art Distributed Acoustic Sensing (DAS) now offers a 1-meter sensor resolution for tens of kilometers of fiber. In other words, a single DAS system can record up to 40,000 data channels at once – two orders of magnitude more than the entire earthquake-monitoring seismic network in Israel. In this talk, I will first introduce the underlying operating principles of DAS acquisition. These measurements are very different from conventional seismic sensors and need to be analyzed accordingly. Subsequently, most of the talk will revolve around DAS applications in various scenarios. We utilize the ambient seismic field, recorded on a standard telecommunication fiber deployed around the Stanford campus, to analyze subsurface properties. The same fiber can also be used to measure changes in traffic patterns due to the COVID-19 lockdown. With downhole DAS arrays deployed in deep vertical wells, we can study previously undetected low-magnitude earthquakes. Finally, we utilize DAS data recorded inside an unconventional gas field to unveil reservoir properties with unprecedented resolution. Close abstractClose abstract
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    Contact: dalia.madhala@weizmann.ac.il
    Zoom meeting on https://weizmann.zoom.us/j/98139055420?pwd=aUtCWDY4czgvMXY2R2xDU3pRTCtqZz09
  • Lecture

    What caused megadroughts in North and South America?

    Date: Tuesday, November 24, 2020 Hour: 11:00
    Speaker: Nathan Steiger , Hebrew University of Jerusalem
    Share the event What caused megadroughts in North and South America? on email Add the event What caused megadroughts in North and South America? to calendar
    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Insights on Processes in Polar Supercooled Cloud Lifecycles from Observations and Cloud Resolving Model Simulations

    Date: Tuesday, November 17, 2020 Hour: 16:15
    Speaker: Israel Silber, Department of Meteorology and Atmospheric Science Pennsylvania State University
    Abstract: Supercooled clouds substantially impact polar surface energy budgets but large-scale models often underestimate their occurrence, which motivates accurately establishing metrics of read more »Continue read abstract
    Abstract: Supercooled clouds substantially impact polar surface energy budgets but large-scale models often underestimate their occurrence, which motivates accurately establishing metrics of basic processes. A polar stratiform cloud’s lifecycle is determined by a set of complex interactions and feedbacks between different micro-physical and macro-physical processes, some of which are not fully understood or quantified, leading to uncertainty in climate predictions. These polar clouds are commonly presupposed as being turbulent as a result of intense cloud-top longwave radiative cooling, while experiencing desiccation dominated by precipitating ice. In this talk, I examine some of these underlying assumptions and provide applicable guidance for large-scale model evaluation. I first present observations of persistent formation of drizzle drops at cloud temperatures below -25 °C detected over McMurdo Station, Antarctica. These supercooled drizzle observations supported by large-eddy simulations (LES) used to examine the cloud’s formation and evolution under initially stable, nonturbulent conditions, suggest that drizzle can be common over polar regions and serve as the main cloud moisture sink even well below the freezing temperature. A persistent nonturbulent cloud state suggested by the LES leads to the examination of nonturbulent cloud occurrence in observational datasets from Arctic and Antarctic ground-based sites. Such stable, nonturbulent conditions, surmised to preferentially occur early in cloud lifecycles, are estimated to prevail in a quarter of cloud occurrences over these polar sites. I use LES sensitivity tests to examine how short to intermediate period gravity waves, which are supported by such stable conditions, may catalyze turbulence formation when aerosol particles available for activation are sufficiently small. The observational datasets are also utilized to examine ice precipitation processes, and show that the vast majority of polar supercooled clouds are at least weakly precipitating ice at the cloud base even when they are not seeded from above, consistent with commonly observed supercooled cloud longevity. These results indicate that supercooled cloud layers are a sustained source of ice precipitation, and suggest that ground-based statistics offer valuable guidance for large-scale models. Finally, as an example of how some of these observational and modeling results may be used to evaluate the representations of polar clouds in large-scale models, I briefly describe using the GISS E3 climate model in single-column model (SCM) mode applied to the supercooled drizzle case study. Close abstractClose abstract
    Share the event Insights on Processes in Polar Supercooled Cloud Lifecycles from Observations and Cloud Resolving Model Simulations on email Add the event Insights on Processes in Polar Supercooled Cloud Lifecycles from Observations and Cloud Resolving Model Simulations to calendar
    Contact: dalia.madhala@weizmann.ac.il
    Zoom meeting on https://weizmann.zoom.us/j/98304295504?pwd=UmlnM3FMVG5pRHBTSFhhVTZEc3RRQT09
  • Lecture

    Why are there colors in the ocean?

    Date: Thursday, September 10, 2020 Hour: 09:00
    Speaker: Derya Akkaynak, Harbor Branch Oceanographic Institution Florida Atlantic University
    Homepage of event Why are there colors in the ocean? Share the event Why are there colors in the ocean? on email Add the event Why are there colors in the ocean? to calendar
    Contact: dalia.madhala@weizmann.ac.il
    Zoom meeting on https://weizmann.zoom.us/j/94960131201?pwd=ZjB3RkdIYnRhNFB3U056Y0lzaUltZz09
  • Lecture

    Maritime silver trade in the Levant during the Iron Age and its effect on human pollution

    Date: Sunday, June 7, 2020 Hour: 11:00
    Speaker: Yigal Erel , The Hebrew University of Jerusalem & University of Haifa, Israel
    Share the event Maritime silver trade in the Levant during the Iron Age and its effect on human pollution on email Add the event Maritime silver trade in the Levant during the Iron Age and its effect on human pollution to calendar
    Contact: dalia.madhala@weizmann.ac.il
    Zoom meeting on https://weizmann.zoom.us/j/93311757358
  • Lecture

    Life and death in a pinch of salt: chronology, sedimentology, and geobiology of the Messenian Salinity Crisis deposits in the deep Levant Basin

    Date: Sunday, May 31, 2020 Hour: 11:00
    Speaker: Aaron Meilijson , University of Haifa
    Abstract: The Messinian Salinity Crisis (MSC; 5.97-5.33 Ma) is considered an extreme environmental event driven by changes in climate and tectonics, which affected global ocean salinity and read more »Continue read abstract
    Abstract: The Messinian Salinity Crisis (MSC; 5.97-5.33 Ma) is considered an extreme environmental event driven by changes in climate and tectonics, which affected global ocean salinity and shaped the biogeochemical composition of the Mediterranean Sea. Yet, after more than 50 years of research, MSC chronology and events remains controversial. Recently drilled offshore wells in the Levant Basin retrieved for the first time a complete sedimentary record of the deep-basin Mediterranean MSC salt deposits and the underlying Pre-Evaporite unit. Analysis of this dataset changes the way these deposits have been perceived since the 1970’s, when they were first penetrated in their uppermost part during DSDP expeditions. Using sedimentology, chemistry, seismic interpretation, biostratigraphy, and astronomical tuning we show that Messinian salt deposition in the Eastern Mediterranean began during stage 1, and not stage 2 of the MSC. In contrast to the present paradigm, salt was deposited synchronously with gypsum deposition in the marginal and intermediate-depth basins. This occurred significantly earlier than the 50 kyr interval coined as the ‘MSC acme event’, ~300 kyr after the crisis began. The one-kilometer-thick lower part of the evaporitic unit is composed of essentially pure halite, except for a thin transitional anhydrite layer at its base. The halite is undisturbed and homogeneous, lacking diverse features apparent in more proximal sections, indicating a deep-sea depositional environment. We find that distinct, meters-thick non-evaporitic intervals interbedded with the halite, previously thought to be clastic layers, are diatomites. While XRD analysis confirms an increase in clastic components in these sediments, they are composed primarily of well-preserved marine and freshwater planktonic diatoms. The occurrence of marine planktonic diatoms in these intervals indicates the input of Atlantic waters into the Mediterranean Basin during the deposition of the massive halite unit. In the second part of this talk I will couple lipid biomarker analysis with faunal and taxonomic evaluation of the diatom assemblages to try and answer the following question: why do we see this extreme abundance of diatoms, but a complete absence of calcareous-shelled forms of life within the MSC salt deposits? This study demonstrates that brine formation, salt precipitation, and faunal extinction occurred at least in part in a deep, non-desiccated basin, with a restricted yet open Mediterranean-Atlantic connection that allowed inflow of oceanic water. A coeval onset of basinal halite and marginal gypsum precipitation calls for a revaluation of global-scale climatic and oceanographic models of the MSC, while substantially altering our understanding of the mechanisms governing the deposition of salt giants. Close abstractClose abstract
    Share the event Life and death in a pinch of salt: chronology, sedimentology, and geobiology of the Messenian Salinity Crisis deposits in the deep Levant Basin on email Add the event Life and death in a pinch of salt: chronology, sedimentology, and geobiology of the Messenian Salinity Crisis deposits in the deep Levant Basin to calendar
    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    TBA

    Date: Sunday, April 5, 2020 Hour: 11:00
    Speaker: Colin Price
    Share the event TBA on email Add the event TBA to calendar
    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    TBA

    Date: Sunday, March 29, 2020 Hour: 11:00
    Speaker: Bar Oryan
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Seismic sensing with optical fibers – principles and applications

    Date: Tuesday, March 17, 2020 Hour: 10:30
    Speaker: Ariel Lellouch, Department of Geophysics Stanford University
    Abstract: During the last decade, seismic sensing with optical fibers has become a reality. By analyzing the effect of seismic deformation on the fiber’s optical response, state-of-the-art read more »Continue read abstract
    Abstract: During the last decade, seismic sensing with optical fibers has become a reality. By analyzing the effect of seismic deformation on the fiber’s optical response, state-of-the-art Distributed Acoustic Sensing (DAS) now offers a 1-meter sensor resolution for tens of kilometers of fiber. In other words, a single DAS system can record up to 40,000 data channels at once – two orders of magnitude more than the entire earthquake-monitoring seismic network in Israel. In this talk, I will first introduce the underlying operating principles of DAS acquisition. These measurements are very different from conventional seismic sensors and need to be analyzed accordingly. Subsequently, most of the talk will revolve around DAS applications in various scenarios. We use the ambient seismic field, recorded on a standard telecommunication fiber deployed around the Stanford campus, to analyze subsurface properties. We also acquired DAS data from a downhole fiber deployed in the SAFOD well and utilized it to reconstruct the earth’s structure and detect earthquakes. Finally, we study DAS data from an unconventional gas field and show how to conduct a simple analysis that unveils reservoir properties. Close abstractClose abstract
    Share the event Seismic sensing with optical fibers – principles and applications on email Add the event Seismic sensing with optical fibers – principles and applications to calendar
    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Potential role of cloud microorganisms in atmospheric chemistry

    Date: Sunday, March 15, 2020 Hour: 11:00
    Speaker: Anne-Marie Delort , Institut de Chimie de Clermont-Ferrand, CNRS, Université Clermont Auvergne
    Abstract: We have shown that microorganisms (bacteria, yeast and fungi) were present in clouds and were metabolically active. As a consequence a new scientific question rose: are they able t read more »Continue read abstract
    Abstract: We have shown that microorganisms (bacteria, yeast and fungi) were present in clouds and were metabolically active. As a consequence a new scientific question rose: are they able to modify the chemical composition of clouds and be an alternative route to radical chemistry? In the past we have mainly studied the biotransformation of simple carbon compounds (acetate, succinate, formate, methanol, formaldehyde), and oxidants (H2O2). We showed that biodegradation rates were within the same range of order than photo-transformation rates. More recently we investigated their potential biodegradation activity towards atmospheric pollutants. Using GCxGC-HRMS technique we were able to detect and identify over 100 semi-volatile compounds in 3 cloud samples collected at the puy de Dôme station (1465 m, France). Among these compounds, 10 priority pollutants from the US EPA list were identified and quantified. We focused our work on the biodegradation of phenol and catechol in clouds using two strategies. 1) A metatranscriptomic analysis showed in cloud activity of microorganisms. We detected transcripts of genes coding for phenol monooxygenases (and phenol hydroxylases) and catechol 1,2-dioxygenases. These enzymes were likely from Gamma-proteobacteria (Acinetobacter and Pseudomonas genera). 2) 145 bacterial strains isolated from cloud water were screened for their phenol degradation capabilities, 93% of them (mainly Pseudomonas and Rhodococcus strains) were positive. These findings highlighted the possibility of phenol degradation by microorganisms in clouds. To go further we measured the biodegradation rates of Phenol and Catechol by one of the most active strain (Rhodococcus enclensis) and compared them with the transformation rates resulting from the reactivity of °OH and NO3°radicals. In the cloud water phase, both phenol transformation rates were within the same range of order, while biodegradation of catechol was ten times quicker than chemical transformation. The experimentally derived biodegradation rates were included in a multiphase box model to compare the chemical loss rates of phenol and catechol in both the gas and aqueous phases to their biodegradation rate in the aqueous phase under atmospheric conditions. In conclusion our results suggest that cloud microorganisms could play a role in atmospheric chemistry. Close abstractClose abstract
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    TBA

    Date: Sunday, March 8, 2020 Hour: 11:00
    Speaker: Antonello Provenzale
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    TBA

    Date: Sunday, March 1, 2020 Hour: 11:00
    Speaker: Yakov Weiss , The Hebrew University of Jerusalem
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Exploring the limits of Earth’s habitability by scientific ocean drilling: The impact of temperature on microbial life and carbon flow in deep sub-seafloor sediments

    Date: Sunday, February 23, 2020 Hour: 11:00
    Speaker: Verena Heuer, National Academy of Science University of Bremen
    Share the event Exploring the limits of Earth’s habitability by scientific ocean drilling: The impact of temperature on microbial life and carbon flow in deep sub-seafloor sediments on email Add the event Exploring the limits of Earth’s habitability by scientific ocean drilling: The impact of temperature on microbial life and carbon flow in deep sub-seafloor sediments to calendar
    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Utilization of machine learning techniques to retrieve aerosol and cloud properties from remote sensing measurements

    Date: Sunday, February 9, 2020 Hour: 11:00
    Speaker: Michal Segal Rosenheimer , Tel Aviv University
    Share the event Utilization of machine learning techniques to retrieve aerosol and cloud properties from remote sensing measurements on email Add the event Utilization of machine learning techniques to retrieve aerosol and cloud properties from remote sensing measurements to calendar
    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Developing Models to Estimate Crop Water Consumption based on Remote Sensing and Meteorological Data

    Date: Sunday, February 2, 2020 Hour: 11:00
    Speaker: Offer Rozenstein, Volcani
    Share the event Developing Models to Estimate Crop Water Consumption based on Remote Sensing and Meteorological Data on email Add the event Developing Models to Estimate Crop Water Consumption based on Remote Sensing and Meteorological Data to calendar
    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Quantifying Holocene rainfall and evaporation in East Asia

    Date: Sunday, January 26, 2020 Hour: 11:00
    Speaker: Yoni Goldsmith , Hebrew University of Jerusalem
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Soil Spectroscopy throughout the Years: Availabilities and Capabilities

    Date: Sunday, January 19, 2020 Hour: 11:00
    Speaker: Eyal Ben-Dor , Department of Geography Porter School of Environment and Earth Sciences Faculty of Exact Sciences Tel Aviv University Israel
    Abstract: The soil spectroscopy discipline has been progressed over the past two decades quite remarkably. Many portable point spectrometers became available through that time where recently read more »Continue read abstract
    Abstract: The soil spectroscopy discipline has been progressed over the past two decades quite remarkably. Many portable point spectrometers became available through that time where recently also image spectrometers have become quite popular. The technology was used in the laboratory, field, and airborne levels and provided a new capability for a rapid and quantitative view of a large number of samples. At the same time platforms were also developed to carry the new family of sensors for remote sensing applications of large areas using ground and airborne vehicles ( manned and un-manned) and recently even satellites. This progress has led to a large number of activities in exploiting the spectroscopy for many applications within the soil science discipline. As the data acquisition increases and the soil spectral database has been enlarged, a new technique to compile soil spectral database together with methods to effectively analyze them has also been developed. To that end, activities to deal with the data mining process using big databases were successfully adopted from other disciplines while also designed especially for the soil spectroscopy activity. The results demonstrated that soil spectroscopy could be used for many applications from different domains such as soil mapping, precision agriculture, and laboratory work and can progress the soil science discipline quite forward. In this talk, we will review the history of soil spectroscopy from the first spectrometer and platform to the present situation. A particular emphasis will be given to the recent applications that have been developed in our group and to the future capability of this critical technology from all perspectives and to the new horizon it may open as expressed by space agencies such as NASA, ESA, ASI, JAXA, ISA and DLR. Close abstractClose abstract
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Orbital modulation of geological activity

    Date: Sunday, January 12, 2020 Hour: 11:00
    Speaker: Francis Nimmo, Department of Earth and Planetary Sciences University of California Santa Cruz
    Abstract: Many planetary bodies experience tides, which produce time-varying stresses. Seismic activity on the Moon is modulated by tides, and there are hints of similar effects on Earth (bu read more »Continue read abstract
    Abstract: Many planetary bodies experience tides, which produce time-varying stresses. Seismic activity on the Moon is modulated by tides, and there are hints of similar effects on Earth (but not, so far, Mars). In this talk I'll describe two other places where tides modulate geological activity at different periods: Io, a highly volcanic moon of Jupiter; and Enceladus, a small icy moon of Saturn. In both cases we can use remote-sensing observations of the modulation to make inferences about the properties of these bodies' interiors. One could imagine similar approaches being used for tidally-distorted exoplanets (e.g. the TRAPPIST system). Close abstractClose abstract
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    The Critical Role of Chronology in Understanding Past Climate Change: Precisely Reconstructing Holocene Climate at Mono Lake, California

    Date: Sunday, January 5, 2020 Hour: 11:00
    Speaker: Susan R. H. Zimmerman, Atmospheric, Earth and Energy Division Lawrence Livermore National Laboratory
    Abstract: Recent droughts and floods in California have drawn attention to the vulnerability of our water-supply system to present and future climate variability. A recent analysis of climat read more »Continue read abstract
    Abstract: Recent droughts and floods in California have drawn attention to the vulnerability of our water-supply system to present and future climate variability. A recent analysis of climate-model simulations suggests that wet and dry conditions in California may be predictably linked to tropical and high-latitude conditions, a hypothesis that should be testable using paleoclimate records. Abundant paleoclimate evidence indicates that natural whiplash between wet and dry conditions characterized California’s climate throughout the last 4000 years, especially during the Medieval Climate Anomaly (~AD 950 to 1250), but the chronologies of the records are not precise enough to correlate to tropical and high-latitude records in order to test the model prediction. Our recent work at Mono Lake, a climatically sensitive lake on the arid eastern side of the Sierra Nevada mountain range, has focused on exploring and developing radiocarbon dating of pollen purified by flow cytometry as a tool for high-resolution dating of lake records. Our results suggest that pollen can be reliably separated and dated, but (like everything in lakes) must be interpreted within the specific geologic system where it was produced, deposited, and preserved. If pollen dating proves robust in many lake systems, it may provide the high-precision chronologies required for spatial mapping of past terrestrial climate changes. Close abstractClose abstract
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Should multiple agents work together or split their job to control populations of harmful species?

    Date: Thursday, January 2, 2020 Hour: 11:00
    Speaker: Adam Lampert
    Abstract: The management of harmful species, including invasive species, pests, parasites, and diseases, is a major global challenge. Harmful species cause severe damage to ecosystems, biodi read more »Continue read abstract
    Abstract: The management of harmful species, including invasive species, pests, parasites, and diseases, is a major global challenge. Harmful species cause severe damage to ecosystems, biodiversity, agriculture, and human health. In particular, the management of harmful species often requires cooperation among multiple agents, such as land‐owners, agencies, and countries. Each agent may have incentives to contribute less to the treatment, leaving more work for other agents, which may result in inefficient treatment. A central question is, therefore, how should a policymaker allocate the treatment duties among the agents? Specifically, should the agents work together in the same area, or should each agent work only in a smaller area designated just for her/him? I will present a dynamic game-theoretic model, where a Nash equilibrium corresponds to a possible set of contributions that the agents could adopt over time. In turn, the allocation by the policymaker determines which of the Nash equilibria could be adopted, which will allow us to compare the outcome of various allocations. I will show that fewer agents abate the harmful species population faster, but multiple agents can better control the population to keep its density lower. This is proven in a general theorem and demonstrated numerically for two case studies. Therefore, following an outbreak, the better policy would be to split and assign one or a few agents to treat the species in a given location; but if controlling the harmful species population at some low density is needed, the agents should work together in all the locations. Close abstractClose abstract
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    A mechanism for positive lapse-rate feedback in polar regions

    Date: Monday, December 30, 2019 Hour: 11:00
    Speaker: Prof. Rodrigo Caballero, Department of Meteorology (MISU) Stockholm University
    Abstract: Observations and climate simulations show that polar regions warm faster than the rest of the globe in response to radiative forcing. Feedback diagnostics in models show that a lar read more »Continue read abstract
    Abstract: Observations and climate simulations show that polar regions warm faster than the rest of the globe in response to radiative forcing. Feedback diagnostics in models show that a large fraction of this enhanced polar warming is due to strong positive lapse-rate feedback. However, there is little mechanistic understanding for why this feedback is positive and what controls its strength. Here, I discuss a mechanism for high-latitude lapse rate feedback and show it functioning in a set of simplified GCM simulations. The mechanism hinges crucially on low cloud response. In this sense, high-latitude lapse-rate feedback is a cloud feedback in disguise. Close abstractClose abstract
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Water-use strategies leading to resilience of pine trees to global climatic change

    Date: Tuesday, December 24, 2019 Hour: 10:30
    Speaker: Yakir Preisler, Department of Earth and Planetary Sciences Weizmann Institute of Science Department of Plant Sciences and Genetics in Agriclture The Hebrew University of Jerusalem
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Study of S isotope values of specific organic and inorganic S compounds in immature organic rich sediments

    Date: Sunday, December 22, 2019 Hour: 11:00
    Speaker: Lubna Shawar , The Hebrew University of Jerusalem
    Abstract: The preservation of the organic matter (OM) occurs as a result of post-depositional abiotic sulfurization, condensation and polymerization processes that convert the OM into stable read more »Continue read abstract
    Abstract: The preservation of the organic matter (OM) occurs as a result of post-depositional abiotic sulfurization, condensation and polymerization processes that convert the OM into stable macromolecular material termed kerogen. Different sulfurization processes, pathways and rates affect the 34S values of organic and inorganic S compounds. These sulfurization processes are affected by the redox conditions and paleo-environmental conditions (e.g. organic matter and Fe availability). Therefore, studying the organic and inorganic S distribution and their associated 34S values could be useful for understanding the paleo-environmental history associated with the deposition of ancient organic rich sediments. Until recently, only bulk phases of S could be measured for their 34S values, usually excluding organic S. A new method was developed that allows for S isotope analysis of specific organic S compounds (OSCs) at the sub- nanogram level. In my talk I will give an overview about the utility of compound specific S isotope analysis (CSSIA) for the study of different geochemical environments (e.g., immature organic rich sediments). Applying CSSIA to immature organic rich sediments from the Monterey and Ghareb formations I will show the combination of biomarkers and their S isotope composition in a single analysis. This provides a more detailed and in-depth understanding of the S and C cycles than bulk measurements of organic and inorganic S species alone. Close abstractClose abstract
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Evaporation from the ocean: A new Lagrangian model and its application to observations

    Date: Sunday, December 15, 2019 Hour: 11:00
    Speaker: Natan Paldor, The Hebrew University of Jerusalem
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Using cosmogenic 21Ne to quantify sediment residence time in large-scale fluvial systems throughout the geological record

    Date: Sunday, December 1, 2019 Hour: 11:00
    Speaker: Michal Ben-Israel, The Hebrew University of Jerusalem
    Abstract: Rivers are the most effective agent of erosion on earth, transporting massive amounts of detrital and dissolved matter into depositional basins, making them a significant part of t read more »Continue read abstract
    Abstract: Rivers are the most effective agent of erosion on earth, transporting massive amounts of detrital and dissolved matter into depositional basins, making them a significant part of the rock cycle. To better understand the relationship between denudation of continents and the rivers that drain them, numerous studies examine the pathways of sediment transport through large drainage systems. However, due to the complex nature of sediment storage and transport dynamics in large-scale fluvial systems, the amount of time sediment spends in the sedimentary system is poorly constrained. We measured cosmogenic 21Ne to quantify the exposure time of sediments within large-scale fluvial systems in large rivers: the modern Colorado river, the Miocene Hazeva River (~18 Ma), and the Lower Cretaceous (~130 Ma) Kurnub fluvial system. We observe that fluvial transport dynamics in large rivers are complex and that sediment transport time varies significantly and can last between very rapid (faster than our analytical measurement limitation ~103 yr) and 105 yr. To better understand the nature of fluvial transport dynamics in large rivers, we constructed a stochastic model that simulates repeated episodes of burial and exposure and examines the changes in concentrations of cosmogenic 26Al, 10Be, and 21Ne. We compared the simulated results to the concentrations measured in the Colorado River, and we predict that the total that sediment spent both buried and exposed – the residence time in large rivers is ~103-105 years. These observations suggest that the time-scales of sediment transport in large rivers have not changed significantly over the past 130 Myr and have remained significantly fast compared to other processes in the rock-cycle. Close abstractClose abstract
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    A Photodynamical Model for Uniform and Precise Planetary Parameters Determination in Kepler Systems

    Date: Wednesday, November 27, 2019 Hour: 13:30
    Speaker: Gidi Yoffe, Department of Earth and Planetary Sciences Weizmann Institute of Science
    Share the event A Photodynamical Model for Uniform and Precise Planetary Parameters Determination in Kepler Systems on email Add the event A Photodynamical Model for Uniform and Precise Planetary Parameters Determination in Kepler Systems to calendar
    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Internal Waves in the Ocean - what we know, and what we don't

    Date: Tuesday, November 26, 2019 Hour: 11:00
    Speaker: Yuri V Lvov , Rensselaer Polytechnic Institute
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Isotopic diagenesis of biogenic silica in marine sediments and implications for Cenozoic climate

    Date: Sunday, November 24, 2019 Hour: 11:00
    Speaker: Anastasia Yanchilina, Department of Earth and Planetary Sciences Weizmann Institute of Science
    Abstract: The oxygen isotopic signature of marine deep-sea cherts was previously used to reconstruct past ocean temperature and bottom water δ18O through the Cenozoic and Mesozoic periods. read more »Continue read abstract
    Abstract: The oxygen isotopic signature of marine deep-sea cherts was previously used to reconstruct past ocean temperature and bottom water δ18O through the Cenozoic and Mesozoic periods. Oxygen isotopes of deep-sea cherts, which were never exposed to meteoric water, exhibit a wide range of values indicating that the evolution and maturation of biogenic amorphous opal (opal-A) to opal-CT and microquartz chert is accompanied by isotopic changes. We measured δ18O of diatom opal-A, opal-CT, and microquartz chert from deep sea cores retrieved from the Japan Sea. The δ18O of opal-CT and microquartz chert phases correspond to the depth in the sediments where these transitions occur, ~400 m and 40 °C for opal-A to opal-CT and ~500 m and 60 °C for opal-CT to microquartz chert. The δ18O values of opal-CT and microquartz chert appear to reflect equilibrium formation temperatures of silica, corresponding to the geothermal gradient and the local porewater δ18O. The δ18O of opal-CT and microquartz chert are controlled by the geothermal gradient and compositions of pore waters during polymorphic transformations deep within the sediment, indicating that the δ18O of these phases cannot be used to determine temperature or composition of seawater during diatom growth. Opal-A is the most susceptible phase for isotope alteration. We separated opal-A (i.e., diatoms, radiolaria, and siliceous sponge spicules) of Cenozoic age and measured its isotope composition. The results do not indicate any significant change in δ18O. This will be discussed within the general framework of global climatic change. Close abstractClose abstract
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    A universal rank-order transform to extract signals from noisy data

    Date: Sunday, November 17, 2019 Hour: 11:00
    Speaker: Alex Kostinski, Michigan Technological University
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Kepler's Multiple Planet Systems

    Date: Sunday, November 10, 2019 Hour: 14:00
    Speaker: Jack Lissauer , NASA Ames Research Center
    Abstract: More than one-third of the 4000+ planet candidates found by NASA’s Kepler spacecraft are associated with target stars that have more than one planet candidate, and such “multis read more »Continue read abstract
    Abstract: More than one-third of the 4000+ planet candidates found by NASA’s Kepler spacecraft are associated with target stars that have more than one planet candidate, and such “multis” account for the vast majority of candidates that have been verified as true planets. The large number of multis tells us that flat multiplanet systems like our Solar System are common. Virtually all of the candidate planetary systems are stable, as tested by numerical integrations that assume a physically motivated mass-radius relationship. Statistical studies performed on these candidate systems reveal a great deal about the architecture of planetary systems, including the typical spacing of orbits and flatness. The characteristics of several of the most interesting confirmed Kepler & TESS multi-planet systems will also be discussed. Close abstractClose abstract
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Ocean Worlds of the Outer Solar System: Life as we know it or life as we don’t?

    Date: Sunday, November 3, 2019 Hour: 11:00
    Speaker: Alex Hayes, Associate Professor, Director, Cornell Center for Astrophysics and Planetarty Science, Director of the Spacecraft Planetary Image Facility
    Abstract: Recent discoveries have shown that habitable environments likely exist in subsurface water oceans within the outer planet moons of Europa and Enceladus. On Titan, the largest moon read more »Continue read abstract
    Abstract: Recent discoveries have shown that habitable environments likely exist in subsurface water oceans within the outer planet moons of Europa and Enceladus. On Titan, the largest moon of Saturn, lakes and seas of liquid hydrocarbon exist in addition to a vast subsurface water ocean. These places represent ideal locations for hydrothermal environments that could sustain life as we know it and, in Titan’s case, perhaps even life as we don’t. The next generation of uncrewed planetary spacecraft will be designed to search for the signs of life in one or more of these worlds. This lecture will begin with a brief review of the discoveries that have motivated a renewed importance for Ocean World exploration, before diving into Titan's lakes and seas to discuss recent findings related to its hydrocarbon-based hydrologic cycle and setting the stage for the newly selected Dragonfly quadcopter set to explore Titan in the mid 2030s. Close abstractClose abstract
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Forecast Skill and the Impact of Equatorial Waves in Two Operational Weather Prediction Systems

    Date: Wednesday, September 18, 2019 Hour: 11:00
    Speaker: George N. Kiladis , Physical Sciences Division, Earth System Research Laboratory National Oceanic and Atmospheric Administration Boulder, Colorado
    Abstract: Equatorially trapped waves account for a large portion of the perturbations within the tropical atmosphere and ocean. In the atmosphere, these disturbances are coupled to convectio read more »Continue read abstract
    Abstract: Equatorially trapped waves account for a large portion of the perturbations within the tropical atmosphere and ocean. In the atmosphere, these disturbances are coupled to convection and determine a significant amount of rainfall variability on synoptic to intraseasonal time scales. Numerical models used for both weather and climate forecasting universally still have great difficulty simulating these convectively coupled disturbances. We assess the quantitative precipitation forecasts (QPF) skill of NOAA's Global Forecast System (GFS) and the European Centre for Medium Range Weather Forecasting Integrated Forecast System (IFS) operational models used for short term forecasts out to 10 days. Forecast skill was assessed by comparison with virtually independent GPM and CMORPH satellite precipitation estimates. Skill was quantified using a variety of metrics including pattern correlations for various latitude bands, temporal correlation at individual grid points, and space-time spectra of forecast precipitation over the global tropics and extratropics. Results reveal that, in general, initial conditions are reasonably well estimated in both forecast systems, as indicated by relatively good scores for the 6-12 hour forecasts. Since precipitation estimates are not directly assimilated into these systems, this indicates that the initialization of dynamical and thermodynamical fields is able to produce a reasonable QPF field, at least for the larger scales. We present evidence that the specification of the mass circulation rather than the moisture field is the primary source of this initial skill. Model skill is substantially better overall in the extratropics, however, tropical QPF in both systems is not considered useful by typical metrics much beyond a few days. A portion of this lack of tropical skill in can be traced back to inadequate treatment of equatorial wave activity coupled to convection. It is also demonstrated that extratropical forecast skill is positively correlated to preceding tropical skill, strongly suggesting that improvements in the treatment of tropics will lead to improved extratropical forecasts on the weekly and longer timescale. Close abstractClose abstract
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Influence of terrestrial plants and phytoplankton on photochemical air-pollution

    Date: Sunday, June 30, 2019 Hour: 11:00
    Speaker: Eran Tas, Hebrew University of Jerusalem
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Geochemical Dynamics of Atmospheric Oxygen

    Date: Tuesday, June 25, 2019 Hour: 11:00
    Speaker: Dan Schrag, Harvard University
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    A Forward Model for the Architecture of Inner Planetary Systems

    Date: Sunday, June 23, 2019 Hour: 11:00
    Speaker: Eric Ford, Department of Astronomy and Astrophysics Penn State
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Geoethics: what is geoethics and what it has to do with us?

    Date: Sunday, June 16, 2019 Hour: 11:00
    Speaker: Nir Orion, Department of Science Teaching Weizmann Institute of Science
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    The Ventilated Thermocline in the Tropical Pacific and Its Relationship to Decadal Variability in Global Warming

    Date: Tuesday, June 11, 2019 Hour: 14:00
    Speaker: Dan Schrag, Harvard University
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    The role of clouds in extratropical climate change and variability

    Date: Sunday, June 2, 2019 Hour: 11:00
    Speaker: David Thompson
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Mixing and Unmixing in Planets

    Date: Sunday, May 26, 2019 Hour: 11:00
    Speaker: David Stevenson
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Fluvial response to base-level fall: insights from the main perennial tributaries of the Dead Sea

    Date: Sunday, May 19, 2019 Hour: 11:00
    Speaker: Elad Dente , Hebrew University of Jerusalem
    Share the event Fluvial response to base-level fall: insights from the main perennial tributaries of the Dead Sea on email Add the event Fluvial response to base-level fall: insights from the main perennial tributaries of the Dead Sea to calendar
    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Improving the detection of biological aerosols in the atmosphere - pollen, spores, and nitrated proteins

    Date: Sunday, May 12, 2019 Hour: 11:00
    Speaker: Alex Huffman, University of Denver
    Share the event Improving the detection of biological aerosols in the atmosphere - pollen, spores, and nitrated proteins on email Add the event Improving the detection of biological aerosols in the atmosphere - pollen, spores, and nitrated proteins to calendar
    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    The pathway of atmospheric water from ocean evaporation to rainout in extratropical weather systems

    Date: Sunday, May 5, 2019 Hour: 11:00
    Speaker: Heini Wernli , ETH
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    The stinging mechanism of jellyfish

    Date: Sunday, April 28, 2019 Hour: 11:00
    Speaker: Uri Shavit , Technion
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    From patterns to function in dryland ecosystems

    Date: Sunday, April 14, 2019 Hour: 11:00
    Speaker: Ehud Meron , Ben Gurion University
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Digitally draining the oceans (so we can see what’s inside)

    Date: Monday, April 8, 2019 Hour: 10:00
    Speaker: Derya Akkaynak, Princeton University
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    What planet formation tells us about planetary interior structure

    Date: Sunday, April 7, 2019 Hour: 11:00
    Speaker: Alona Vazan , Hebrew University
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Optics in the Air

    Date: Wednesday, April 3, 2019 Hour: 14:00
    Speaker: Joseph Shaw, Director, Optical Technology Center Montana State University
    Abstract: This talk will use photographs and diagrams to illustrate and explain some of the beautiful optical phenomena observable in nature, such as ice‐crystal halos, rainbows, and sky c read more »Continue read abstract
    Abstract: This talk will use photographs and diagrams to illustrate and explain some of the beautiful optical phenomena observable in nature, such as ice‐crystal halos, rainbows, and sky colors, and will relate them to ongoing research into the spectral and spatial distribution of polarization in the atmosphere. Our group at Montana State University has pioneered all‐sky imaging methods to study skylight polarization and relate it to properties of airborne particles, clouds, and the underlying surface. Brief results from a deployment of all‐sky polarization imagers at the August 2017 solar eclipse will be shown and related to a more general discussion of atmospheric optical effects that can be seen by eye. The talk takes its title from my 2017 book, which describes optical phenomena in nature, especially as seen through airplane windows. Close abstractClose abstract
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Physical modelling of canopy flows

    Date: Sunday, March 31, 2019 Hour: 11:00
    Speaker: Yardena Raviv , Biological Institute
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Multiphase Chemistry of Organic Aerosols and Reactive Oxygen Species in the Atmosphere

    Date: Sunday, March 24, 2019 Hour: 11:00
    Speaker: Manabu Shiraiwa , UCI
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Reductionist vs. Emergence-based approaches to the study of complex systems: Examples from cloud systems

    Date: Sunday, March 17, 2019 Hour: 11:00
    Speaker: Graham Feingold , NOAA
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    The interior of Jupiter revealed by Juno

    Date: Sunday, March 10, 2019 Hour: 11:00
    Speaker: Jamila Miguel, Leiden
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Sensitivity Analysis and Uncertainty Quantification in Hydrogeological Modeling

    Date: Sunday, March 3, 2019 Hour: 11:00
    Speaker: Alberto Guadagnini , Politenico di Milano
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Scattering of radiation by porous and amorphous atmospheric aerosol

    Date: Sunday, February 24, 2019 Hour: 11:00
    Speaker: Caryn Erlick-Haspel , Hebrew University
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Geostrophic Turbulence and the Formation of Large Scale Structure

    Date: Sunday, February 17, 2019 Hour: 11:00
    Speaker: Edgar Knobloch , Department of Physics University of California, Berkley
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Uncertainty in aquatic ecosystems: living with it, managing with it…

    Date: Sunday, February 10, 2019 Hour: 11:00
    Speaker: Gideon Gal, Kinneret Limnological Laboratory, (KLL)
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    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    Field and Laboratory Studies of Ice Nucleation by Organic Aerosols: Insights on Phase Transitions and Glass Formation

    Date: Wednesday, February 6, 2019 Hour: 11:00
    Speaker: Prof. Daniel Cziczo, Earth, Atmospheric and Planetary Sciences Civil and Environmental Engineering Massachusetts Institute of Technology
    Share the event Field and Laboratory Studies of Ice Nucleation by Organic Aerosols: Insights on Phase Transitions and Glass Formation on email Add the event Field and Laboratory Studies of Ice Nucleation by Organic Aerosols: Insights on Phase Transitions and Glass Formation to calendar
    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    δ26Mg values of low-T hydrothermal fluids exert new constraints on the oceanic Mg budget and require significant dolomite formation

    Date: Tuesday, February 5, 2019 Hour: 11:00
    Speaker: Netta Shalev , ETH Zurich
    Share the event δ26Mg values of low-T hydrothermal fluids exert new constraints on the oceanic Mg budget and require significant dolomite formation on email Add the event δ26Mg values of low-T hydrothermal fluids exert new constraints on the oceanic Mg budget and require significant dolomite formation to calendar
    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    The biomass distribution on earth

    Date: Sunday, February 3, 2019 Hour: 11:00
    Speaker: Ron Milo, Department of Plant and Environmental Sciences Weizmann Institute of Science
    Share the event The biomass distribution on earth on email Add the event The biomass distribution on earth to calendar
    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
  • Lecture

    TBA

    Date: Sunday, January 27, 2019 Hour: 11:00
    Speaker: Jiwchar Ganor , BGU University
    Share the event TBA on email Add the event TBA to calendar
    Contact: dalia.madhala@weizmann.ac.il
    Location: Sussman Family Building for Environmental Sciences
Department of Earth and Planetary Sciences

Department of Earth and Planetary Sciences

Faculty of Chemistry
Weizmann Institute of Science

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Last update:
27 Jan 2021