Farmer, Jesse R; Pico, Tamara; Underwood, Ona M; Cleveland-Stout, Rebecca; Sigman, Daniel M; Granger, Julie; Fripiat, François; Cronin, Thomas M; Martínez-García, Alfredo; Haug, Gerald H (2023): Arctic Ocean 50 ka foram-bound nitrogen isotope data, core age models, and Bering Strait sea level simulations [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.954603
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Abstract:
The cyclic growth and decay of continental ice sheets can be reconstructed from the history of global sea level. Sea level is relatively well-constrained for the Last Glacial Maximum (LGM, 26,500-19,000 years ago, 26.5-19 ka) and the ensuing deglaciation. However, sea-level estimates for the period of ice-sheet growth before the LGM vary by > 60 m, an uncertainty comparable to the sea-level equivalent of the contemporary Antarctic Ice Sheet. Here we constrain sea level prior to the LGM by reconstructing the flooding history of the shallow Bering Strait since 46 ka. Our data constraint on Bering Strait flooding are nitrogen isotope measurements in organic matter bound in the planktonic foraminifer Neogloboquadrina pachyderma from four sediment cores in the Arctic Ocean, dating back to ~50,000 years before present. These data extend the previous measurements of Farmer et al., 2021 (https://doi.org/10.1038/s41561-021-00789-y). We additionally provide new Bayesian age-depth models for each sediment core based on existing radiocarbon (14C) measurements on N. pachyderma. The nitrogen isotope data are compared with a suite of reconstructions of global mean sea-level and relative sea level at the Bering Strait from glacial isostatic adjustment modeling covering the last 120,000 years.
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Farmer, Jesse R; Pico, Tamara; Underwood, Ona M; Cleveland-Stout, Rebecca; Granger, Julie; Cronin, Thomas M; Fripiat, François; Martínez-García, Alfredo; Haug, Gerald H; Sigman, Daniel M (2023): The Bering Strait was flooded 10,000 years before the Last Glacial Maximum. Proceedings of the National Academy of Sciences, 120(1), e2206742119, https://doi.org/10.1073/pnas.2206742119
Farmer, Jesse R; Sigman, Daniel M; Granger, Julie; Underwood, Ona M; Fripiat, François; Cronin, Thomas M; Martínez-García, Alfredo; Haug, Gerald H (2021): Arctic Ocean stratification set by sea level and freshwater inputs since the last ice age. Nature Geoscience, 14(9), 684-689, https://doi.org/10.1038/s41561-021-00789-y
Coverage:
Median Latitude: 83.585420 * Median Longitude: 164.271068 * South-bound Latitude: 78.128000 * West-bound Longitude: 140.179990 * North-bound Latitude: 88.873300 * East-bound Longitude: -174.288700
Date/Time Start: 1994-08-03T00:00:00 * Date/Time End: 1994-08-19T00:00:00
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
3 datasets
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Datasets listed in this bundled publication
- Farmer, JR; Pico, T; Underwood, OM et al. (2023): Primary and alternative 14C Bayesian age-depth models of sediment from the Arctic Ocean. https://doi.org/10.1594/PANGAEA.954601
- Farmer, JR; Pico, T; Underwood, OM et al. (2023): Foraminifera-bound nitrogen isotope ratios of sediment from the Arctic Ocean. https://doi.org/10.1594/PANGAEA.954602
- Farmer, JR; Pico, T; Underwood, OM et al. (2023): Bering Strait sea level simulations. https://doi.org/10.1594/PANGAEA.954605