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Title: Greenland-Wide Seasonal Temperatures During the Last Deglaciation

Journal Article · · Geophysical Research Letters
DOI:https://doi.org/10.1002/2017gl075601· OSTI ID:1565632

The sensitivity of the Greenland ice sheet to climate forcing is of prime importance in assessing its contribution to past and future sea level rise. Surface mass loss occurs during summer, and accounting for temperature seasonality is critical in simulating ice sheet evolution and in interpreting glacial landforms and chronologies. Ice core records constrain the timing and magnitude of climate change but are largely limited to annual mean estimates from the ice sheet interior. In this work, we merge ice core reconstructions with transient climate model simulations to generate Greenland-wide and seasonally resolved surface air temperature fields during the last deglaciation. Greenland summer temperatures peak in the early Holocene, consistent with records of ice core melt layers. We perform deglacial Greenland ice sheet model simulations to demonstrate that accounting for realistic temperature seasonality decreases simulated glacial ice volume, expedites the deglacial margin retreat, mutes the impact of abrupt climate warming, and gives rise to a clear Holocene ice volume minimum.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)
Sponsoring Organization:
USDOE Office of Science (SC); National Science Foundation (NSF)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1565632
Journal Information:
Geophysical Research Letters, Vol. 45, Issue 4; ISSN 0094-8276
Publisher:
American Geophysical UnionCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 90 works
Citation information provided by
Web of Science

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Cited By (14)

Instability of the Northeast Greenland Ice Stream over the last 45,000 years journal May 2018
Hot summers ahead? Multi-decadal spring season warming precedes sudden summer temperature rise in pre-anthropogenic climate change journal July 2019
Local ice caps in Finderup Land, North Greenland, survived the Holocene Thermal Maximum journal February 2019
Ice-stream demise dynamically conditioned by trough shape and bed strength journal April 2019
Ice core evidence for decoupling between midlatitude atmospheric water cycle and Greenland temperature during the last deglaciation journal January 2018
Eemian Greenland SMB strongly sensitive to model choice journal January 2018
The sensitivity of the Greenland Ice Sheet to glacial–interglacial oceanic forcing journal January 2018
Antarctic temperature and CO2: near-synchrony yet variable phasing during the last deglaciation journal January 2019
Submarine melt as a potential trigger of the North East Greenland Ice Stream margin retreat during Marine Isotope Stage 3 journal January 2019
The impact of model resolution on the simulated Holocene retreat of the southwestern Greenland ice sheet using the Ice Sheet System Model (ISSM) journal January 2019
Eemian Greenland SMB strongly sensitive to model choice text January 2018
Eemian Greenland SMB strongly sensitive to model choice text January 2018
A simulated Northern Hemisphere terrestrial climate dataset for the past 60,000 years journal November 2019
Author Correction: A simulated Northern Hemisphere terrestrial climate dataset for the past 60,000 years journal March 2020