Early Holocene Laurentide Ice Sheet Retreat Influenced Summer Atmospheric Circulation in Baffin Bay

Elizabeth K. Thomas; Allison A. Cluett; Michael P. Erb; Nicholas P. McKay; Jason P. Briner; Isla S. Castañeda; Megan C. Corcoran; Owen C. Cowling; Devon B. Gorbey; Kurt R. Lindberg; Karlee K. Prince; Jeffrey Salacup

doi:10.1029/2023GL103428

Early Holocene Laurentide Ice Sheet Retreat Influenced Summer Atmospheric Circulation in Baffin Bay

Elizabeth K. Thomas, Allison A. Cluett, Michael P. Erb, Nicholas P. McKay, Jason P. Briner, Isla S. Castañeda, Megan C. Corcoran, Owen C. Cowling, Devon B. Gorbey, Kurt R. Lindberg, Karlee K. Prince, Jeffrey Salacup

Earth and Sustainability

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Changes in ice-sheet size impact atmospheric circulation, a phenomenon documented by models but constrained by few paleoclimate records. We present sub-centennial-scale records of summer temperature and summer precipitation hydrogen isotope ratios (δ²H) spanning 12–7 ka from a lake on Baffin Island. In a transient model simulation, winds in this region were controlled by the relative strength of the high-pressure systems and associated anticyclonic circulation over the retreating Greenland and Laurentide ice sheets. The correlation between summer temperature and precipitation δ²H proxy records changed from negative to positive at 9.8 ka. This correlation structure indicates a shift from alternating local and remote moisture, governed by the two ice-sheet high-pressure systems, to only remote moisture after 9.8 ka, governed by the strong Greenland high-pressure system after the Laurentide Ice Sheet retreated. Such rapid atmospheric circulation changes may also occur in response to future, gradual ice-sheet retreat.

Original language	English (US)
Article number	e2023GL103428
Journal	Geophysical Research Letters
Volume	50
Issue number	13
DOIs	https://doi.org/10.1029/2023GL103428
State	Published - Jul 16 2023

Keywords

Arctic
Early Holocene
atmospheric circulation
deglaciation
lipid biomarkers
precipitation isotopes

ASJC Scopus subject areas

Geophysics
General Earth and Planetary Sciences

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10.1029/2023GL103428

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Thomas, E. K., Cluett, A. A., Erb, M. P., McKay, N. P., Briner, J. P., Castañeda, I. S., Corcoran, M. C., Cowling, O. C., Gorbey, D. B., Lindberg, K. R., Prince, K. K., & Salacup, J. (2023). Early Holocene Laurentide Ice Sheet Retreat Influenced Summer Atmospheric Circulation in Baffin Bay. Geophysical Research Letters, 50(13), Article e2023GL103428. https://doi.org/10.1029/2023GL103428

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abstract = "Changes in ice-sheet size impact atmospheric circulation, a phenomenon documented by models but constrained by few paleoclimate records. We present sub-centennial-scale records of summer temperature and summer precipitation hydrogen isotope ratios (δ2H) spanning 12–7 ka from a lake on Baffin Island. In a transient model simulation, winds in this region were controlled by the relative strength of the high-pressure systems and associated anticyclonic circulation over the retreating Greenland and Laurentide ice sheets. The correlation between summer temperature and precipitation δ2H proxy records changed from negative to positive at 9.8 ka. This correlation structure indicates a shift from alternating local and remote moisture, governed by the two ice-sheet high-pressure systems, to only remote moisture after 9.8 ka, governed by the strong Greenland high-pressure system after the Laurentide Ice Sheet retreated. Such rapid atmospheric circulation changes may also occur in response to future, gradual ice-sheet retreat.",

keywords = "Arctic, Early Holocene, atmospheric circulation, deglaciation, lipid biomarkers, precipitation isotopes",

author = "Thomas, {Elizabeth K.} and Cluett, {Allison A.} and Erb, {Michael P.} and McKay, {Nicholas P.} and Briner, {Jason P.} and Casta{\~n}eda, {Isla S.} and Corcoran, {Megan C.} and Cowling, {Owen C.} and Gorbey, {Devon B.} and Lindberg, {Kurt R.} and Prince, {Karlee K.} and Jeffrey Salacup",

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doi = "10.1029/2023GL103428",

language = "English (US)",

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T1 - Early Holocene Laurentide Ice Sheet Retreat Influenced Summer Atmospheric Circulation in Baffin Bay

AU - Thomas, Elizabeth K.

AU - Cluett, Allison A.

AU - Erb, Michael P.

AU - McKay, Nicholas P.

AU - Briner, Jason P.

AU - Castañeda, Isla S.

AU - Corcoran, Megan C.

AU - Cowling, Owen C.

AU - Gorbey, Devon B.

AU - Lindberg, Kurt R.

AU - Prince, Karlee K.

AU - Salacup, Jeffrey

PY - 2023/7/16

Y1 - 2023/7/16

N2 - Changes in ice-sheet size impact atmospheric circulation, a phenomenon documented by models but constrained by few paleoclimate records. We present sub-centennial-scale records of summer temperature and summer precipitation hydrogen isotope ratios (δ2H) spanning 12–7 ka from a lake on Baffin Island. In a transient model simulation, winds in this region were controlled by the relative strength of the high-pressure systems and associated anticyclonic circulation over the retreating Greenland and Laurentide ice sheets. The correlation between summer temperature and precipitation δ2H proxy records changed from negative to positive at 9.8 ka. This correlation structure indicates a shift from alternating local and remote moisture, governed by the two ice-sheet high-pressure systems, to only remote moisture after 9.8 ka, governed by the strong Greenland high-pressure system after the Laurentide Ice Sheet retreated. Such rapid atmospheric circulation changes may also occur in response to future, gradual ice-sheet retreat.

AB - Changes in ice-sheet size impact atmospheric circulation, a phenomenon documented by models but constrained by few paleoclimate records. We present sub-centennial-scale records of summer temperature and summer precipitation hydrogen isotope ratios (δ2H) spanning 12–7 ka from a lake on Baffin Island. In a transient model simulation, winds in this region were controlled by the relative strength of the high-pressure systems and associated anticyclonic circulation over the retreating Greenland and Laurentide ice sheets. The correlation between summer temperature and precipitation δ2H proxy records changed from negative to positive at 9.8 ka. This correlation structure indicates a shift from alternating local and remote moisture, governed by the two ice-sheet high-pressure systems, to only remote moisture after 9.8 ka, governed by the strong Greenland high-pressure system after the Laurentide Ice Sheet retreated. Such rapid atmospheric circulation changes may also occur in response to future, gradual ice-sheet retreat.

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KW - Early Holocene

KW - atmospheric circulation

KW - deglaciation

KW - lipid biomarkers

KW - precipitation isotopes

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Early Holocene Laurentide Ice Sheet Retreat Influenced Summer Atmospheric Circulation in Baffin Bay

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