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

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

doi:10.1029/2023gl103428

i

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

Supporting Files

2023
By Thomas, Elizabeth K. ; Cluett, Allison A. ; Erb, Michael P. ; ...

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Journal Title:

Geophysical Research Letters
Personal Author:

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

NMFS (National Marine Fisheries Service) ; SWFSC (Southwest Fisheries Science Center)
Description:

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:

General Earth And Planetary Sciences Geophysics General Earth And Planetary Sciences General Earth And Planetary Sciences
Source:

Geophysical Research Letters, 50(13)
DOI:

https://doi.org/10.1029/2023gl103428
ISSN:

0094-8276 ; 1944-8007
Publisher:

American Geophysical Union (AGU)
Document Type:

Journal Article
License:

https://creativecommons.org/licenses/by-nc/4.0/
Rights Information:

CC BY-NC
Compliance:

Library
Main Document Checksum:

urn:sha256:d9e53e11e50a11801f337f26050a02956d8c7c3c04bc70841aa8f1f5242d9d42
Download URL:

https://repository.library.noaa.gov/view/noaa/59245/noaa_59245_DS1.pdf
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[PDF - 1.23 MB ]

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