A5088893035- Geology and Paleoclimatology Research
- Isotope Analysis in Ecology
- Archaeology and ancient environmental studies
- Geological formations and processes
- Groundwater and Isotope Geochemistry
- Karst Systems and Hydrogeology
- Tree-ring climate responses
- Pleistocene-Era Hominins and Archaeology
- Climate variability and models
- Forensic Anthropology and Bioarchaeology Studies
- Coastal wetland ecosystem dynamics
- Heavy metals in environment
- Landslides and related hazards
- Marine and coastal ecosystems
- Pacific and Southeast Asian Studies
- Geomagnetism and Paleomagnetism Studies
- Hydrology and Sediment Transport Processes
- Marine Bivalve and Aquaculture Studies
- Plant Water Relations and Carbon Dynamics
- Climate change and permafrost
- Mine drainage and remediation techniques
- Minerals Flotation and Separation Techniques
- Eurasian Exchange Networks
- Mass Spectrometry Techniques and Applications
- Aeolian processes and effects
Hebrew University of Jerusalem
2012-2025
Lamont-Doherty Earth Observatory
2013-2022
Columbia University
2013-2022
California Institute of Technology
2018-2020
Geological Survey of Israel
2012-2013
The magnitude, rate, and extent of past future East Asian monsoon (EAM) rainfall fluctuations remain unresolved. Here, late Pleistocene-Holocene EAM intensity is reconstructed using a well-dated northeastern China closed-basin lake area record located at the modern northwestern fringe EAM. northern alternated rapidly between wet dry periods on time scales centuries. Lake levels were 60 m higher than present during early middle Holocene, requiring twofold increase in annual rainfall, which,...
Abstract Increasing lines of evidence question the homogenous response Asian Summer Monsoon (ASM) precipitation patterns, requiring rethinking forcing mechanisms. Here we show a ~15,000‐year quantitative history based on well‐dated lake levels at Lake Chenghai, subtropical China. and inferred were high during Bølling‐Allerød, early late Holocene, but low middle Holocene. The orbital scale trend is out phase with boreal summer insolation, later has been widely suggested as driver ASM...
Abstract. Palaeoclimate information on multiple climate variables at different spatiotemporal scales is becoming increasingly important to understand environmental and societal responses change. A lack of high-quality reconstructions past hydroclimate has recently been identified as a critical research gap. Speleothems, with their precise chronologies, widespread distribution, ability record changes in local regional variability, are an ideal source such information. Here, we present new...
The reasons and processes that led hunter-gatherers to transition into a sedentary agricultural way of life are fundamental unresolved question human history. Here we present results excavations two single-occupation early Neolithic sites (dated 7.9 7.4 ka) high-resolution archaeological surveys in northeast China, which capture the earliest stages sedentism millet cultivation second oldest center domestication Old World. coincided with significant wetter conditions north at 8.1–7.9 ka. We...
Abstract. Sedimentary records of lipid biomarkers such as leaf wax n-alkanes are influenced by not only ecosystem turnover and physiological changes in plants but also earth surface processes integrating these signals into the sedimentary record, though effect integration is fully understood. To determine depositional constraints on biomarker a high-altitude small catchment system, we collected both soil stream sediments along 1000 m altitude transect (1500–2500 a.s.l.) Areguni Mountains,...
Extended salt deposits, indicative of pronounced aridity, are preserved in a 220,000-year sediment core from the Dead Sea eastern Mediterranean Levant. These arid intervals occur warm interglacial periods Marine Isotope Stages (MIS) 7, 5, and Holocene, coincide with maxima Northern Hemisphere fall precession cycle. Similar layers also present during current penultimate deglaciations. In insolation-driven climate model simulations, North Atlantic latitudinal surface temperature gradient...
Abstract Understanding landscape evolution history and sedimentary dynamics in high mountainous regions is tampered by rapid erosion of the archives. Naturally dammed lakes provide unique snapshots these processes enable evaluating under climatic conditions different from present. Marpha Lake, Himalayan rain‐shadow upper Kali Gandaki, central Nepal, with its ∼450 m thick lacustrine sequence provides a rare opportunity to study processes. Optically Stimulated Luminescence (OSL) quartz...
Abstract. Sedimentary records of lipid biomarkers such as leaf wax n-alkanes are not only influenced by ecosystem turnover and physiological changes in plants, they also earth surface processes integrating these signals. The integration into the sedimentary record effects on recorded environmental signals complex fully understood. To determine depositional constraints biomarker a high-altitude small catchment system, we collected both soil stream sediments along 1000 m altitude transect...
The mechanisms underlying the current greenhouse gas (GHG) forced decline in Mediterranean rainfall remain a matter of debate. To inform our understanding and projected drying, we examined extended arid intervals late Quaternary, Eastern (EM) Levant indicated by substantial salt deposits Dead Sea sediment core covering past 220 kyr. These events occurred during interglacials, when Earth was at perihelion to sun boreal fall glacial-interglacial transitions, associated with icesheet melting....
Abstract The hydrogen (δD wax ) and carbon (δ 13 C isotope compositions of long‐chain alkanes derived from plant waxes record hydrological environmental conditions. However, the integration n ‐alkanes into sedimentary cycle, variability δD δ in soils, paleoclimate applicability paleosols archaeological sediments are poorly constrained. We sampled plants soils across a steep climate transect Israel to understand how type parameters shape . This has three advantages: existence long‐term...
Abstract. Paleoclimate information on multiple climate variables at different spatiotemporal scales is increasingly important to understand environmental and societal responses change. A lack of high-quality reconstructions past hydroclimate has recently been identified as a critical research gap. Speleothems, with their precise chronologies, widespread distribution, ability record changes in local regional variability, are an ideal source such information. Here we present new version the...
Abstract Rain‐belt migration, and in particular monsoon are a cardinal, yet under‐constrained aspect of climate change. Here, we present new lake‐level record from closed‐basin lake northern China compilation available level records lakes located at the margins East Asian Indian regions. These data show that ca. 6 ka ago, changes water availability, as recorded by surface areas lakes, shrunk dramatically, within few decades, have not been restored to their pre‐6 sizes since. imply Indo‐East...
Traditionally, nuclear spin is not considered to affect biological processes. Recently, this has changed as isotopic fractionation that deviates from classical mass dependence was reported both in vitro and vivo. In these cases, the effect correlates with magnetic spin. Here, we show effects using stable oxygen isotopes ( 16 O, 17 18 O) two separate setups: an artificial dioxygen production system aquaporin channels cells. We observe dynamics chiral environments (in particular its transport)...
Abstract This study presents an assessment of the potential application Mn content in rock varnish laminae as a paleoclimate indicator. To investigate environmental controls on formation, we determined composition formed flint artifacts produced during earliest Holocene from eight coeval prehistoric sites Negev desert, Israel. These lie along north–south annual rainfall transect ranging between 120 and 30 mm yr − 1 . The is ~ 100 times enriched relative to desert dust source material....
Enclosures, single large curvilinear structures, constitute ubiquitous relics of past human societies in marginal environments. Many enclosures suffer from severe scarcity related artefactual and ecofactual remains, allowing only tentative assessments their date function. A case point comes the J udean D esert, S outhern L evant, where several dozen were surveyed described as C halcolithic cult sites. Using new research strategies, incorporating critical evaluation previous surveys, test...