Lake Level Fluctuations in the Northern Great Basin for the Last 25,000 years

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Authors

Lauren Santi , Daniel Enrique Ibarra , John Mering, Alexandrea Arnold, Aradhna Tripati, Chloe Whicker, Charles G. Oviatt

Abstract

During the Last Glacial Maximum (LGM; ~23,000 to 19,000 years ago or ka) and through the last deglaciation, the Great Basin physiographic region in the western United States was marked by multiple extensive lake systems, as recorded by proxy evidence and lake sediments. However, temporal constraints on the growth, desiccation, and timing of lake highstands remain poorly constrained. Studies aimed at disentangling hydroclimate dynamics have offered multiple hypotheses to explain the growth of post-LGM lakes; however, a more robust understanding is currently impeded by a general paucity of spatially and temporally robust data. In this study, we present new data constraining the timing and extent of lake highstands at three post-LGM age pluvial lakes: Lake Newark, Lake Surprise, and Lake Franklin. This data is used in concert with previously published data for these basins and others from the Northern Great Basin including Lakes Bonneville, Chewaucan, and Lahontan to compare the timings of lake growth and decay over a large spatial scale and constrain how regional hydroclimate evolved through the deglaciation.

DOI

https://doi.org/10.31223/osf.io/6as7t

Subjects

Climate, Earth Sciences, Environmental Sciences, Geology, Hydrology, Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics, Sedimentology

Keywords

hydroclimate, paleoclimate, Last Glacial Maximum, bonneville, hydrologic index, lahontan, lake hydrograph, LGM, paleohydrology

Dates

Published: 2019-05-30 14:38

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License

GNU Lesser General Public License (LGPL) 2.1

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