A5088403665- Geology and Paleoclimatology Research
- Cryospheric studies and observations
- Climate change and permafrost
- Methane Hydrates and Related Phenomena
- Winter Sports Injuries and Performance
- Pleistocene-Era Hominins and Archaeology
- Geological formations and processes
- Geophysics and Gravity Measurements
- Archaeology and ancient environmental studies
- Ionosphere and magnetosphere dynamics
- Landslides and related hazards
- Earthquake Detection and Analysis
- Service-Learning and Community Engagement
- Maritime and Coastal Archaeology
- Geological and Geochemical Analysis
- Hydrology and Sediment Transport Processes
- Geological Studies and Exploration
- Astro and Planetary Science
- Indigenous Studies and Ecology
- Education Systems and Policy
- Underwater Acoustics Research
- Radioactive contamination and transfer
- Marine and Coastal Research
University at Buffalo, State University of New York
2021-2024
Middlebury College
2020
Abstract. The late-Pleistocene history of the coastal Cordilleran Ice Sheet remains relatively unstudied compared to chronologies Laurentide Sheet. Yet accurate reconstructions extent and timing ice retreat along Pacific Coast are essential for paleoclimate modeling, assessing meltwater contribution North Pacific, determining availability ice-free land margin human migration from Beringia into rest Americas. To improve chronology in Alexander Archipelago, Alaska, we applied 10Be 36Cl dating...
Projections of future sea-level rise benefit from understanding the response past ice sheets to interglacial warmth. Constraints on extent inland Greenland Ice Sheet (GrIS) recession during Middle Holocene (~8 – 4 ka) are limited because geological records a smaller-than-modern phase largely remain beneath modern sheet. We drilled through 509 m firn and at Prudhoe Dome (PD), northwest obtain sub-ice material yielding direct evidence for NW GrIS Our infrared stimulated luminescence...
Abstract. The lack of continental ice sheets in Alaska during the Last Glacial Maximum (LGM; 26–19 ka) has long been attributed to extensive aridity western Arctic. More recently, climate model outputs, a few isolated paleoclimate studies, and global synthesis products show mild summer temperature depressions compared much high northern latitudes. This suggests importance limited controlling relatively glacier growth LGM. To explore this further, we present new statewide map LGM alpine...
Abstract. Direct observations of the size Greenland Ice Sheet during Quaternary interglaciations are sparse yet valuable for testing numerical models ice-sheet history and sea level contribution. Recent measurements cosmogenic nuclides in bedrock from beneath collected past deep-drilling campaigns reveal that ice sheet was significantly smaller, perhaps largely absent, sometime 1.1 million years. These discoveries decades-old basal samples motivate new, targeted sampling cosmogenic-nuclide...
Abstract. The timing of the last deglaciation Laurentide Ice Sheet in western New York is poorly constrained. lack direct chronology region has led to a hypothesis that re-advanced near its Last Glacial Maximum terminal position at ∼ 13 ka, which challenges long-standing datasets. To address this hypothesis, we obtained new from Kent (terminal) and Lake Escarpment (first major recessional) moraines using radiocarbon ages sediment cores moraine kettles supplemented with two optically...
We applied luminescence dating to a suite of shorelines constructed by pluvial Lake Clover in northeastern Nevada, USA during the last glacial cycle. At its maximum extent, lake covered 740 km2 with mean depth 16 m and water volume 13 km3. In north-central sector basin, 10 obvious beach ridges extend from highstand lowest shoreline over horizontal distance ~1.5 km, representing area decrease 35%. These are primarily composed sandy gravel rise ~1.0 above alluvial fan surface on which they...
Abstract. The timing of the last deglaciation Laurentide Ice Sheet in western New York is poorly constrained. lack direct chronology region has led to a provocative hypothesis that re-advanced near its Last Glacial Maximum terminal position at ~13 ka, which challenges long-standing datasets. To address this hypothesis, we obtained new from Kent (terminal) and Lake Escarpment (first major recessional) moraines using radiocarbon ages basal sediments moraine kettles supplemented with two...
Fieldwork is a key element in natural sciences, including polar yet there notable lack of representation minorities field expeditions. Despite the historical involvement ethnic such expeditions, their role as contributors and experts scientific knowledge has often been overlooked. In our efforts to promote diversity inclusivity it important reshape fieldwork spaces. This entails providing support help individuals navigate these spaces, particularly if they are engaging for first time....
Abstract. The contribution of the Greenland Ice Sheet (GIS) to sea level rise (SLR) is accelerating and there an urgent need improve predictions when from what parts ice sheet will contribute its first meter. Estimating volume that was lost during past warm periods offers a way constrain sheet’s response future warming. Sub-ice sediment bedrock, retrieved deep core campaigns or targeted drilling efforts, yield critical direct information about ice-free conditions. However, it challenging...
Abstract. We used mapping of bedrock lithology, fractures, and lake density in Inglefield Land, northwest Greenland, combined with cosmogenic nuclide (10Be 26Al) measurements surfaces, to investigate glacial erosion the ice-sheet history northwestern Greenland Ice Sheet. The pattern eroded versus weathered surfaces other indicators reveal temporally spatially varying under cold- warm-based ice. All that we measured Land contain inheritance apparent 10Be ages ranging from 24.9 ± 0.5 215.8 7.4...
Sea-level rise of even one meter will have drastic global impacts. Melting the Greenland Ice Sheet (GIS) would raise sea level by 7.4 meters. There is an urgent need to improve predictions how quickly GIS contribute its first sea-level rise, and from where on ice sheet that water come. Estimating volume was lost during past warm periods offers a way constrain sheet’s likely response future warming. Here, we assess potential across Greenland, based ensemble ice-sheet model simulations...
Abstract. The lack of continental ice sheets in Alaska during the Last Glacial Maximum (LGM; 26–19 ka) has long been attributed to arid and relatively warm summer conditions. Records this aridity across are abundant, yet quantitative temperature reconstructions have comparatively lacking until recently. Climate model outputs, a few isolated paleoclimate studies, global synthesis products show mild depressions compared much high northern latitudes. This suggests importance controlling limited...