Sea Ice and Dynamical Controls on Preindustrial and Last Glacial Maximum Accumulation in Central Greenland
Greenland has experienced large changes since the last glacial with its summit warming by approximately 21°C, average accumulation rates tripling, and annual amplitudes of temperature and accumulation seemingly declining. The altered seasonal cycle of accumulation has been attributed to a combinatio...
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ftharvardudash:oai:dash.harvard.edu:1/25667313 2023-05-15T16:26:18+02:00 Sea Ice and Dynamical Controls on Preindustrial and Last Glacial Maximum Accumulation in Central Greenland Rhines, Andrew Nelson Huybers, Peter John 2014 application/pdf http://nrs.harvard.edu/urn-3:HUL.InstRepos:25667313 https://doi.org/10.1175/jcli-d-14-00075.1 en_US eng American Meteorological Society doi:10.1175/jcli-d-14-00075.1 Journal of Climate Quick submit: 2016-01-29T16:51:50-05:00 Rhines, Andrew, and Peter J. Huybers. 2014. “Sea Ice and Dynamical Controls on Preindustrial and Last Glacial Maximum Accumulation in Central Greenland.” J. Climate 27 (23) (December): 8902–8917. doi:10.1175/jcli-d-14-00075.1. 0894-8755 http://nrs.harvard.edu/urn-3:HUL.InstRepos:25667313 Rhines and Huybers sea ice dynamics Moisture/moisture budget paleoclimate seasonal cycle Journal Article 2014 ftharvardudash https://doi.org/10.1175/jcli-d-14-00075.1 2022-04-05T11:47:02Z Greenland has experienced large changes since the last glacial with its summit warming by approximately 21°C, average accumulation rates tripling, and annual amplitudes of temperature and accumulation seemingly declining. The altered seasonal cycle of accumulation has been attributed to a combination of the large-scale dynamical response of the North Atlantic storm track to surface boundary conditions and the modulation of moisture availability due to changes in winter sea ice cover. Using atmospheric simulations of preindustrial and glacial climate, the contributions of these two mechanisms are evaluated. Estimates of moisture source footprints make it possible to distinguish between long-range transport related to the storm track and regional transport from the ocean surface near Greenland. It is found that the contribution of both mechanisms varies significantly with the background climate. With greater ice cover and the North Atlantic storm track locked to the topographically enhanced stationary wave during the glacial, seasonal migration of the sea ice edge becomes relatively important in controlling moisture availability. In contrast, the preindustrial simulation has relatively greater transient eddy activity and is less moisture limited by sea ice extent, so accumulation is more strongly related to synoptic variability in the North Atlantic. These results highlight how changes in atmospheric circulation and sea ice together explain the shifts in annual mean and seasonal moisture supply to Greenland. Also discussed are some implications of the inferred narrow source distribution of accumulation during the glacial for the interpretation of stable isotopes derived from the central Greenland ice cores. Earth and Planetary Sciences Version of Record Article in Journal/Newspaper Greenland Greenland ice cores North Atlantic Sea ice Harvard University: DASH - Digital Access to Scholarship at Harvard Greenland Journal of Climate 27 23 8902 8917 |
institution |
Open Polar |
collection |
Harvard University: DASH - Digital Access to Scholarship at Harvard |
op_collection_id |
ftharvardudash |
language |
English |
topic |
sea ice dynamics Moisture/moisture budget paleoclimate seasonal cycle |
spellingShingle |
sea ice dynamics Moisture/moisture budget paleoclimate seasonal cycle Rhines, Andrew Nelson Huybers, Peter John Sea Ice and Dynamical Controls on Preindustrial and Last Glacial Maximum Accumulation in Central Greenland |
topic_facet |
sea ice dynamics Moisture/moisture budget paleoclimate seasonal cycle |
description |
Greenland has experienced large changes since the last glacial with its summit warming by approximately 21°C, average accumulation rates tripling, and annual amplitudes of temperature and accumulation seemingly declining. The altered seasonal cycle of accumulation has been attributed to a combination of the large-scale dynamical response of the North Atlantic storm track to surface boundary conditions and the modulation of moisture availability due to changes in winter sea ice cover. Using atmospheric simulations of preindustrial and glacial climate, the contributions of these two mechanisms are evaluated. Estimates of moisture source footprints make it possible to distinguish between long-range transport related to the storm track and regional transport from the ocean surface near Greenland. It is found that the contribution of both mechanisms varies significantly with the background climate. With greater ice cover and the North Atlantic storm track locked to the topographically enhanced stationary wave during the glacial, seasonal migration of the sea ice edge becomes relatively important in controlling moisture availability. In contrast, the preindustrial simulation has relatively greater transient eddy activity and is less moisture limited by sea ice extent, so accumulation is more strongly related to synoptic variability in the North Atlantic. These results highlight how changes in atmospheric circulation and sea ice together explain the shifts in annual mean and seasonal moisture supply to Greenland. Also discussed are some implications of the inferred narrow source distribution of accumulation during the glacial for the interpretation of stable isotopes derived from the central Greenland ice cores. Earth and Planetary Sciences Version of Record |
format |
Article in Journal/Newspaper |
author |
Rhines, Andrew Nelson Huybers, Peter John |
author_facet |
Rhines, Andrew Nelson Huybers, Peter John |
author_sort |
Rhines, Andrew Nelson |
title |
Sea Ice and Dynamical Controls on Preindustrial and Last Glacial Maximum Accumulation in Central Greenland |
title_short |
Sea Ice and Dynamical Controls on Preindustrial and Last Glacial Maximum Accumulation in Central Greenland |
title_full |
Sea Ice and Dynamical Controls on Preindustrial and Last Glacial Maximum Accumulation in Central Greenland |
title_fullStr |
Sea Ice and Dynamical Controls on Preindustrial and Last Glacial Maximum Accumulation in Central Greenland |
title_full_unstemmed |
Sea Ice and Dynamical Controls on Preindustrial and Last Glacial Maximum Accumulation in Central Greenland |
title_sort |
sea ice and dynamical controls on preindustrial and last glacial maximum accumulation in central greenland |
publisher |
American Meteorological Society |
publishDate |
2014 |
url |
http://nrs.harvard.edu/urn-3:HUL.InstRepos:25667313 https://doi.org/10.1175/jcli-d-14-00075.1 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice cores North Atlantic Sea ice |
genre_facet |
Greenland Greenland ice cores North Atlantic Sea ice |
op_relation |
doi:10.1175/jcli-d-14-00075.1 Journal of Climate Quick submit: 2016-01-29T16:51:50-05:00 Rhines, Andrew, and Peter J. Huybers. 2014. “Sea Ice and Dynamical Controls on Preindustrial and Last Glacial Maximum Accumulation in Central Greenland.” J. Climate 27 (23) (December): 8902–8917. doi:10.1175/jcli-d-14-00075.1. 0894-8755 http://nrs.harvard.edu/urn-3:HUL.InstRepos:25667313 |
op_rights |
Rhines and Huybers |
op_doi |
https://doi.org/10.1175/jcli-d-14-00075.1 |
container_title |
Journal of Climate |
container_volume |
27 |
container_issue |
23 |
container_start_page |
8902 |
op_container_end_page |
8917 |
_version_ |
1766015204654579712 |