Arctic Ocean warming and its consequences for the Denmark Strait overflow
Two anomalously warm inflow pulses into the Atlantic Water Layer of the Arctic Ocean have occurred since the late 1980s. As a consequence temperatures of the Arctic basins at 200–800 m depth have increased considerably in comparison to earlier decades. The warm inflow pulses also had a low density....
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Published in | Journal of Geophysical Research Vol. 116; no. C2 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Washington
Blackwell Publishing Ltd
01.02.2011
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Subjects | |
Online Access | Get full text |
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Summary: | Two anomalously warm inflow pulses into the Atlantic Water Layer of the Arctic Ocean have occurred since the late 1980s. As a consequence temperatures of the Arctic basins at 200–800 m depth have increased considerably in comparison to earlier decades. The warm inflow pulses also had a low density. Owing to the decadal time scale of the circulation in the Atlantic Water Layer large pools of anomalously light water have thereby formed in the Arctic Ocean. These will slowly drain back south into the Nordic Seas. We submit that they will be able to influence the overflows into the Atlantic across the Greenland‐Scotland ridges. The Atlantic meridional overturning is fed by these overflows. Our model experiments indicate that the low‐density anomalies from the Arctic Ocean may be able to reduce the Denmark Strait overflow 15–25 years after the entrance of the original signal through Fram Strait into the Arctic Ocean. The actual size of the reduction depends on the exact path and speed of the anomalies inside the Arctic proper and on local processes in the Arctic Ocean and the Nordic Sea. |
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Bibliography: | istex:CDD4C3C12F57770A16B803BCCB071EE060638F17 ArticleID:2010JC006265 ark:/67375/WNG-DH9LMJ51-C ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0148-0227 2169-9275 2156-2202 2169-9291 |
DOI: | 10.1029/2010JC006265 |