Coastal Ice-Core Record of Recent Northwest Greenland Temperature and Sea-Ice Concentration
Coastal ice cores provide an opportunity to investigate regional climate and sea-ice variability in the past to complement hemispheric-scale climate reconstructions from ice-sheet-interior ice cores. Here we describe robust proxies of Baffin Bay temperature and sea-ice concentration from the coastal...
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ftdartmouthcoll:oai:digitalcommons.dartmouth.edu:facoa-2755 2023-07-16T03:56:59+02:00 Coastal Ice-Core Record of Recent Northwest Greenland Temperature and Sea-Ice Concentration Osterberg, Erich C Hawley, Robert L Wong, Gifford Kopec, Ben Ferris, David Howley, Jennifer 2015-09-28T07:00:00Z application/pdf https://digitalcommons.dartmouth.edu/facoa/1752 https://doi.org/10.3189/2015JoG15J054 https://digitalcommons.dartmouth.edu/context/facoa/article/2755/viewcontent/Osterberg_20et_20al.__202015_202Barrel_20record_20of_20temperature_20and_20sea_20ice_20extent.pdf unknown Dartmouth Digital Commons https://digitalcommons.dartmouth.edu/facoa/1752 doi:10.3189/2015JoG15J054 https://digitalcommons.dartmouth.edu/context/facoa/article/2755/viewcontent/Osterberg_20et_20al.__202015_202Barrel_20record_20of_20temperature_20and_20sea_20ice_20extent.pdf Dartmouth Scholarship climate change ice and climate ice core sea ice Climate Earth Sciences Glaciology Physical Sciences and Mathematics text 2015 ftdartmouthcoll https://doi.org/10.3189/2015JoG15J054 2023-06-28T10:40:58Z Coastal ice cores provide an opportunity to investigate regional climate and sea-ice variability in the past to complement hemispheric-scale climate reconstructions from ice-sheet-interior ice cores. Here we describe robust proxies of Baffin Bay temperature and sea-ice concentration from the coastal 2Barrel ice core collected in the Thule region of northwest Greenland. Over the 1990–2010 record, 2Barrel annually averaged methanesulfonic acid (MSA) concentrations are significantly correlated with May–June Baffin Bay sea-ice concentrations and summer temperatures. Higher MSA is observed during warmer years with less sea ice, indicative of enhanced primary productivity in Baffin Bay. Similarly, 2Barrel annually averaged deuterium excess (d-excess) values are significantly correlated with annual Baffin Bay sea-ice concentrations and summer and annual temperatures. Warm (cool) years with anomalously low (high) sea-ice concentration are associated with proportionally more (less) low-d-excess Baffin Bay moisture at the ice-core site. Multilinear regression models incorporating 2Barrel MSA, d-excess and snow accumulation account for 38–51% of the Baffin Bay sea-ice and temperature variance. The annual temperature model is significantly correlated with temperatures throughout most of Greenland and eastern Arctic Canada due to the strong influence of the North Atlantic Oscillation and Atlantic Multidecadal Oscillation. Text Arctic Baffin Bay Baffin Bay Baffin Climate change Greenland ice core Ice Sheet North Atlantic North Atlantic oscillation Sea ice Thule Dartmouth Digital Commons (Dartmouth College) Arctic Baffin Bay Canada Greenland Journal of Glaciology 61 230 1137 1146 |
institution |
Open Polar |
collection |
Dartmouth Digital Commons (Dartmouth College) |
op_collection_id |
ftdartmouthcoll |
language |
unknown |
topic |
climate change ice and climate ice core sea ice Climate Earth Sciences Glaciology Physical Sciences and Mathematics |
spellingShingle |
climate change ice and climate ice core sea ice Climate Earth Sciences Glaciology Physical Sciences and Mathematics Osterberg, Erich C Hawley, Robert L Wong, Gifford Kopec, Ben Ferris, David Howley, Jennifer Coastal Ice-Core Record of Recent Northwest Greenland Temperature and Sea-Ice Concentration |
topic_facet |
climate change ice and climate ice core sea ice Climate Earth Sciences Glaciology Physical Sciences and Mathematics |
description |
Coastal ice cores provide an opportunity to investigate regional climate and sea-ice variability in the past to complement hemispheric-scale climate reconstructions from ice-sheet-interior ice cores. Here we describe robust proxies of Baffin Bay temperature and sea-ice concentration from the coastal 2Barrel ice core collected in the Thule region of northwest Greenland. Over the 1990–2010 record, 2Barrel annually averaged methanesulfonic acid (MSA) concentrations are significantly correlated with May–June Baffin Bay sea-ice concentrations and summer temperatures. Higher MSA is observed during warmer years with less sea ice, indicative of enhanced primary productivity in Baffin Bay. Similarly, 2Barrel annually averaged deuterium excess (d-excess) values are significantly correlated with annual Baffin Bay sea-ice concentrations and summer and annual temperatures. Warm (cool) years with anomalously low (high) sea-ice concentration are associated with proportionally more (less) low-d-excess Baffin Bay moisture at the ice-core site. Multilinear regression models incorporating 2Barrel MSA, d-excess and snow accumulation account for 38–51% of the Baffin Bay sea-ice and temperature variance. The annual temperature model is significantly correlated with temperatures throughout most of Greenland and eastern Arctic Canada due to the strong influence of the North Atlantic Oscillation and Atlantic Multidecadal Oscillation. |
format |
Text |
author |
Osterberg, Erich C Hawley, Robert L Wong, Gifford Kopec, Ben Ferris, David Howley, Jennifer |
author_facet |
Osterberg, Erich C Hawley, Robert L Wong, Gifford Kopec, Ben Ferris, David Howley, Jennifer |
author_sort |
Osterberg, Erich C |
title |
Coastal Ice-Core Record of Recent Northwest Greenland Temperature and Sea-Ice Concentration |
title_short |
Coastal Ice-Core Record of Recent Northwest Greenland Temperature and Sea-Ice Concentration |
title_full |
Coastal Ice-Core Record of Recent Northwest Greenland Temperature and Sea-Ice Concentration |
title_fullStr |
Coastal Ice-Core Record of Recent Northwest Greenland Temperature and Sea-Ice Concentration |
title_full_unstemmed |
Coastal Ice-Core Record of Recent Northwest Greenland Temperature and Sea-Ice Concentration |
title_sort |
coastal ice-core record of recent northwest greenland temperature and sea-ice concentration |
publisher |
Dartmouth Digital Commons |
publishDate |
2015 |
url |
https://digitalcommons.dartmouth.edu/facoa/1752 https://doi.org/10.3189/2015JoG15J054 https://digitalcommons.dartmouth.edu/context/facoa/article/2755/viewcontent/Osterberg_20et_20al.__202015_202Barrel_20record_20of_20temperature_20and_20sea_20ice_20extent.pdf |
geographic |
Arctic Baffin Bay Canada Greenland |
geographic_facet |
Arctic Baffin Bay Canada Greenland |
genre |
Arctic Baffin Bay Baffin Bay Baffin Climate change Greenland ice core Ice Sheet North Atlantic North Atlantic oscillation Sea ice Thule |
genre_facet |
Arctic Baffin Bay Baffin Bay Baffin Climate change Greenland ice core Ice Sheet North Atlantic North Atlantic oscillation Sea ice Thule |
op_source |
Dartmouth Scholarship |
op_relation |
https://digitalcommons.dartmouth.edu/facoa/1752 doi:10.3189/2015JoG15J054 https://digitalcommons.dartmouth.edu/context/facoa/article/2755/viewcontent/Osterberg_20et_20al.__202015_202Barrel_20record_20of_20temperature_20and_20sea_20ice_20extent.pdf |
op_doi |
https://doi.org/10.3189/2015JoG15J054 |
container_title |
Journal of Glaciology |
container_volume |
61 |
container_issue |
230 |
container_start_page |
1137 |
op_container_end_page |
1146 |
_version_ |
1771543513247252480 |