@article{6d8b3d236e0f425da2bd6e282e385f4e,
title = "Early Holocene Laurentide Ice Sheet Retreat Influenced Summer Atmospheric Circulation in Baffin Bay",
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, atmospheric circulation, deglaciation, Early Holocene, 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",
note = "Funding Information: The University at Buffalo operates on the territory of the Seneca Nation, a member of the Haudenosaunee/Six Nations Confederacy. We thank the Qiqitani Inuit who provided access to their land and logistical support for field work. We thank Aron Bini, JR Noble, James Qillaq, Joamie Qillaq, Monica Ridgeway, and Don Rodbell for field support, Martha Raynolds for vegetation data, Harald Sodemann, Hans Christian Steen-Larsen, and Iris Thurnherr for discussions about interpretations, and Ben Gaglioti and an anonymous reviewer for constructive reviews. This research was supported by NSF EAR PDRF 1349595, NSF EAR-IF 1652274, NSF ARCSS 1737716, NSF ARCSS 1947981, and a Fulbright Norway Scholar award to EKT; NSF AGS PDRF 2114657 to AAC; NSF ARCSS 1948005 to MPE and NPM. Funding Information: The University at Buffalo operates on the territory of the Seneca Nation, a member of the Haudenosaunee/Six Nations Confederacy. We thank the Qiqitani Inuit who provided access to their land and logistical support for field work. We thank Aron Bini, JR Noble, James Qillaq, Joamie Qillaq, Monica Ridgeway, and Don Rodbell for field support, Martha Raynolds for vegetation data, Harald Sodemann, Hans Christian Steen‐Larsen, and Iris Thurnherr for discussions about interpretations, and Ben Gaglioti and an anonymous reviewer for constructive reviews. This research was supported by NSF EAR PDRF 1349595, NSF EAR‐IF 1652274, NSF ARCSS 1737716, NSF ARCSS 1947981, and a Fulbright Norway Scholar award to EKT; NSF AGS PDRF 2114657 to AAC; NSF ARCSS 1948005 to MPE and NPM. Publisher Copyright: {\textcopyright} 2023 The Authors.",
year = "2023",
month = jul,
day = "16",
doi = "10.1029/2023GL103428",
language = "English (US)",
volume = "50",
journal = "Geophysical Research Letters",
issn = "0094-8276",
publisher = "American Geophysical Union",
number = "13",
}