Award Abstract # 2110923
When the Earth Warms: Paleoceanography at the Southern Ice Margin in the Bering Sea during Three Glacial-Interglacial Transitions
| NSF Org: | OPP Office of Polar Programs (OPP) |
| Recipient: | |
| Initial Amendment Date: | January 5, 2021 |
| Latest Amendment Date: | January 30, 2024 |
| Award Number: | 2110923 |
| Award Instrument: | Standard Grant |
| Program Manager: | Penny Vlahos pvlahos@nsf.gov (703)292-2671 OPP Office of Polar Programs (OPP) GEO Directorate For Geosciences |
| Start Date: | November 1, 2020 |
| End Date: | February 28, 2025(Estimated) |
| Total Intended Award Amount: | $500,433.00 |
| Total Awarded Amount to Date: | $473,083.00 |
| Funds Obligated to Date: | |
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| Recipient Sponsored Research Office: | 1156 HIGH ST SANTA CRUZ CA US 95064-1077 (831)459-5278 |
| Sponsor Congressional District: | |
| Primary Place of Performance: | 1156 High Street Santa Cruz CA US 95064-1077 |
| Primary Place of Performance Congressional District: | |
| Unique Entity Identifier (UEI): | |
| Parent UEI: | |
| NSF Program(s): | ANS-Arctic Natural Sciences |
| Primary Program Source: | |
| Program Reference Code(s): | |
| Program Element Code(s): | |
| Award Agency Code: | 4900 |
| Fund Agency Code: | 4900 |
| Assistance Listing Number(s): | 47.078 |
ABSTRACT The project has four components: (1) building a dynamic, web-based database of North Pacific paleoceanographic records, (2) using this database to identify spatial and temporal gaps in Bering Sea paleoceanography during three warm periods of Earth history in the past 500,000 years, (3) sampling archived cores to create new, multi-proxy records that can be used for (a) reconstructing sea ice extent, (b) differentiating between the presence of sea ice versus glacial ice, (c) reconstructing sea surface temperatures, and (d) evaluating ventilation and ocean structure, productivity at various ocean levels, changes in the oxygen content of water masses, and the provenance of organic matter, and (4) synthesizing Bering Sea paleoceanographic records to examine variability on glacial-interglacial and millennial timescales. The goals of the project are: (1) to advance understanding of the location of the winter sea ice edge in the North Pacific over time, (2) to determine what aspects of the climate system control the location of the winter sea ice edge: heat export, sea surface temperature, or atmospheric circulation, and (3) to infer how primary productivity is affected by decreasing sea ice extent. This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
The focus of this project is to document the past temporal and spatial variability of Bering Sea paleoceanography through analyses of sediment cores. The project builds on the PI?s prior work creating diatom-based, quantitative and qualitative sea ice proxies in the Bering Sea and participating in large syntheses of North Pacific SST and sea ice distribution since the Last Glacial Maximum. The project will be led by a junior faculty member and will support a female postdoctoral scholar. It will provide the basis for a PhD thesis and also expose undergraduates to paleoclimate research in the lab. This work will be communicated clearly and concisely to the general public in several ways, with emphasis on engaging women and girls in paleoceanography.
PUBLICATIONS PRODUCED AS A RESULT OF THIS RESEARCH
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Davis, Catherine V. and Myhre, Sarah E. and Deutsch, Curtis and Caissie, Beth and Praetorius, Summer and Borreggine, Marisa and Thunell, Robert "Sea surface temperature across the Subarctic North Pacific and marginal seas through the past 20,000 years: A paleoceanographic synthesis" Quaternary Science Reviews , v.246 , 2020 https://doi.org/10.1016/j.quascirev.2020.106519 Citation Details
Praetorius, Summer K. and Alder, Jay R. and Condron, Alan and Mix, Alan C. and Walczak, Maureen H. and Caissie, Beth E. and Erlandson, Jon M. "Ice and ocean constraints on early human migrations into North America along the Pacific coast" Proceedings of the National Academy of Sciences , v.120 , 2023 https://doi.org/10.1073/pnas.2208738120 Citation Details
Seppä, Heikki and Seidenkrantz, Marit-Solveig and Caissie, Beth and Macias-Fauria, Marc "Polar bear's range dynamics and survival in the Holocene" Quaternary Science Reviews , v.317 , 2023 https://doi.org/10.1016/j.quascirev.2023.108277 Citation Details
Thompson, N. and Caissie, B.E "Evaluating the paleoenvironmental significance of sediment grain size in Bering Sea sediments during Marine Isotope Stage 11" Stratigraphy , v.19 , 2022 Citation Details
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