A5065130050- Geology and Paleoclimatology Research
- Cryospheric studies and observations
- Pleistocene-Era Hominins and Archaeology
- Climate change and permafrost
- Methane Hydrates and Related Phenomena
- Geological Studies and Exploration
- Geological formations and processes
- Landslides and related hazards
- Winter Sports Injuries and Performance
- Environmental and Cultural Studies in Latin America and Beyond
- Archaeology and ancient environmental studies
- Paleontology and Stratigraphy of Fossils
- Polar Research and Ecology
- Geological and Geophysical Studies
- Isotope Analysis in Ecology
- Evolution and Paleontology Studies
- Pacific and Southeast Asian Studies
- Diatoms and Algae Research
- Heavy metals in environment
- Coastal and Marine Dynamics
- Coastal wetland ecosystem dynamics
- Aeolian processes and effects
- Geological and Geophysical Studies Worldwide
- Climate variability and models
- Tree-ring climate responses
Dartmouth College
2015-2024
University of Otago
2022-2023
University of Minnesota
2020
Dartmouth Hospital
2015-2017
Geological Survey of Canada
2011
Columbia University
2005-2010
Lamont-Doherty Earth Observatory
2005-2010
University of Bern
2004-2006
Wayne State University
2004
The Ohio State University
2004
A new temperature record from East Africa demonstrates that the tropical lapse rate steepened during last ice age.
The statistical distributions of cosmogenic nuclide measurements from moraine boulders contain previously unused information on ages, and they help determine whether degradation or inheritance is more important individual moraines. Here, we present a method for extracting this by fitting geomorphic process models to observed exposure ages single We also apply 94 10 Be apparent 11 moraines reported in four published studies. Our represent accumulation that are exhumed over time slope...
Significance Reconstructions of climate over Greenland during past warm periods provide crucial insights into the likely response Ice Sheet to future warming. However, limited preservation interglacial archives due extensive glacial scouring has hindered paleoclimate reconstructions along Greenland’s margins. Here, we report a lake sediment record that preserves both present and previous periods. This record, combined with prior studies, demonstrates exceptionally strong warming northern...
Abstract Egesen moraines throughout the Alps mark a glacial advance that has been correlated with Younger Dryas cold period. Using surface exposure dating method, in particular measurement of cosmogenic nuclide 10 Be rock surfaces, we attained four ages for boulders on prominent moraine Great Aletsch Glacier, western Swiss Alps. The dates range from 460±1100 to 9040±1020 yr ago. Three between 9630±810 and ago are based upon samples surfaces granite boulders. Two dates, 9910±970 ago, sample...
Abstract We present a 10 Be chronology of late glacial to early Holocene fluctuations Greenland ice sheet outlet glacier and the adjacent Milne Land cap in central East Greenland. Ages boulders on bedrock indicate that both masses receded during Younger Dryas (YD), likely due rising summer temperatures. Since core records register cold mean annual temperatures throughout YD, these ice‐marginal data support climate conditions characterized by strong seasonality. The deposited inner Stade...
Abstract Patterns that maintain and generate biodiversity of macro‐organisms in the Neotropics are widely discussed scientific literature, yet spatial ecology micro‐organisms is largely unknown. The unique character tropical Andes adjacent Amazon lowlands generates a wide gradient environmental conditions to advance our understanding what drives community assembly diversity processes. We analysed distribution patterns benthic diatoms (unicellular siliceous algae) as model group microbial...
Abstract The Laurentide Ice Sheet (LIS) was the largest ice sheet during last glacial period. An accurate representation of its behavior deglaciation is critical to understanding influence on and response a changing climate. We use 10Be dating Bayesian modeling track recession southwest sector Labrador Dome LIS along an ∼500-km-long transect west Lake Superior deglaciation. This reflects terrestrial ice-margin retreat crosses multiple moraine sets, with southwestern part deglaciated by ca....
Abstract Uncertainties in sea‐level projections for the 21st century have focused ice sheet modelling efforts to include processes that are thought be contributing recently observed rapid changes at margins. This effort is still its infancy, however, leaving us unable make reliable predictions of responses a warming climate if such glacier accelerations were increase size and frequency. The geological record, has long identified examples nonlinear response forcing (Shackleton NJ, Opdyke ND....
Research Article| April 01, 2014 Late Holocene fluctuations of Qori Kalis outlet glacier, Quelccaya Ice Cap, Peruvian Andes Justin S. Stroup; Stroup 1Department Earth Sciences, HB 6105 Fairchild Hall, Dartmouth College, Hanover, New Hampshire 03755, USA Search for other works by this author on: GSW Google Scholar Meredith A. Kelly; Kelly Thomas V. Lowell; Lowell 2Department Geology, 500 Geology-Physics Building, University Cincinnati, Ohio 45221, Patrick J. Applegate; Applegate 3Earth and...