Interannual variability of Arctic sea ice export into the East
[1] Observations since the 1950s suggest that the Arctic climate system is changing in response to rising global air temperatures. These changes include an intensified hydrological cycle, Arctic sea ice decline, and increasing Greenland glacial melt. Here we use new d 18 O data from the East Greenla...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1039.6486 2023-05-15T14:47:06+02:00 Interannual variability of Arctic sea ice export into the East K A Cox J D Stanford A J Mcvicar E J Rohling K J Heywood S Bacon M Bolshaw P A Dodd S De La Rosa D Wilkinson Citation : Cox K A The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1039.6486 http://www.highstand.org/erohling/Rohling-papers/2010-Cox_etal_JGROc.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1039.6486 http://www.highstand.org/erohling/Rohling-papers/2010-Cox_etal_JGROc.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.highstand.org/erohling/Rohling-papers/2010-Cox_etal_JGROc.pdf text ftciteseerx 2020-03-08T01:21:02Z [1] Observations since the 1950s suggest that the Arctic climate system is changing in response to rising global air temperatures. These changes include an intensified hydrological cycle, Arctic sea ice decline, and increasing Greenland glacial melt. Here we use new d 18 O data from the East Greenland Current system at Cape Farewell and Denmark Strait to determine the relative proportions of the freshwater components within the East Greenland Current and East Greenland Coastal Current. Through the comparison of these new data with historical studies, we gain insight into the changing Arctic freshwater balance. We detect three key shifts in the net freshwater component d 18 O values, these are (1) a shift to lighter values in the late 1990s that possibly indicates an increased Greenland glacial melt or a reduced sea ice melt admixture and (2) a shortterm shift to a ∼10‰ heavier value in 2005 followed by (3) a shift back to the historic average value in 2008. The latter fluctuation reflects a short-term dramatic rise and fall of sea ice meltwater addition into the East Greenland Current system. We infer that this anomalously large inclusion of sea ice meltwater resulted from a short-term peak in Arctic sea ice export via Fram Strait. Our findings, therefore, suggest that the freshwater carried in the East Greenland Current system is susceptible to short-term, high-amplitude changes in the upstream freshwater balance, which may have important ramifications for the global thermohaline circulation through the suppression of deep water formation in the North Atlantic. Text Arctic Cape Farewell Denmark Strait East Greenland east greenland current Fram Strait Greenland North Atlantic Sea ice Unknown Arctic Greenland |
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English |
description |
[1] Observations since the 1950s suggest that the Arctic climate system is changing in response to rising global air temperatures. These changes include an intensified hydrological cycle, Arctic sea ice decline, and increasing Greenland glacial melt. Here we use new d 18 O data from the East Greenland Current system at Cape Farewell and Denmark Strait to determine the relative proportions of the freshwater components within the East Greenland Current and East Greenland Coastal Current. Through the comparison of these new data with historical studies, we gain insight into the changing Arctic freshwater balance. We detect three key shifts in the net freshwater component d 18 O values, these are (1) a shift to lighter values in the late 1990s that possibly indicates an increased Greenland glacial melt or a reduced sea ice melt admixture and (2) a shortterm shift to a ∼10‰ heavier value in 2005 followed by (3) a shift back to the historic average value in 2008. The latter fluctuation reflects a short-term dramatic rise and fall of sea ice meltwater addition into the East Greenland Current system. We infer that this anomalously large inclusion of sea ice meltwater resulted from a short-term peak in Arctic sea ice export via Fram Strait. Our findings, therefore, suggest that the freshwater carried in the East Greenland Current system is susceptible to short-term, high-amplitude changes in the upstream freshwater balance, which may have important ramifications for the global thermohaline circulation through the suppression of deep water formation in the North Atlantic. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
K A Cox J D Stanford A J Mcvicar E J Rohling K J Heywood S Bacon M Bolshaw P A Dodd S De La Rosa D Wilkinson Citation : Cox K A |
spellingShingle |
K A Cox J D Stanford A J Mcvicar E J Rohling K J Heywood S Bacon M Bolshaw P A Dodd S De La Rosa D Wilkinson Citation : Cox K A Interannual variability of Arctic sea ice export into the East |
author_facet |
K A Cox J D Stanford A J Mcvicar E J Rohling K J Heywood S Bacon M Bolshaw P A Dodd S De La Rosa D Wilkinson Citation : Cox K A |
author_sort |
K A Cox |
title |
Interannual variability of Arctic sea ice export into the East |
title_short |
Interannual variability of Arctic sea ice export into the East |
title_full |
Interannual variability of Arctic sea ice export into the East |
title_fullStr |
Interannual variability of Arctic sea ice export into the East |
title_full_unstemmed |
Interannual variability of Arctic sea ice export into the East |
title_sort |
interannual variability of arctic sea ice export into the east |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1039.6486 http://www.highstand.org/erohling/Rohling-papers/2010-Cox_etal_JGROc.pdf |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Cape Farewell Denmark Strait East Greenland east greenland current Fram Strait Greenland North Atlantic Sea ice |
genre_facet |
Arctic Cape Farewell Denmark Strait East Greenland east greenland current Fram Strait Greenland North Atlantic Sea ice |
op_source |
http://www.highstand.org/erohling/Rohling-papers/2010-Cox_etal_JGROc.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1039.6486 http://www.highstand.org/erohling/Rohling-papers/2010-Cox_etal_JGROc.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766318244493262848 |