Rapid change in freshwater content of the Arctic Ocean
The dramatic reduction in minimum Arctic sea ice extent in recent years has been accompanied by surprising changes in the thermohaline structure of the Arctic Ocean, with potentially important impact on convection in the North Atlantic and the meridional overturning circulation of the world ocean. E...
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| Veröffentlicht in: | Geophysical research letters 2009-05, Vol.36 (10), p.n/a |
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| creator | McPhee, M. G. Proshutinsky, A. Morison, J. H. Steele, M. Alkire, M. B. |
| description | The dramatic reduction in minimum Arctic sea ice extent in recent years has been accompanied by surprising changes in the thermohaline structure of the Arctic Ocean, with potentially important impact on convection in the North Atlantic and the meridional overturning circulation of the world ocean. Extensive aerial hydrographic surveys carried out in March–April, 2008, indicate major shifts in the amount and distribution of fresh‐water content (FWC) when compared with winter climatological values, including substantial freshening on the Pacific side of the Lomonosov Ridge. Measurements in the Canada and Makarov Basins suggest that total FWC there has increased by as much as 8,500 cubic kilometers in the area surveyed, effecting significant changes in the sea‐surface dynamic topography, with an increase of about 75% in steric level difference from the Canada to Eurasian Basins, and a major shift in both surface geostrophic currents and freshwater transport in the Beaufort Gyre. |
| doi_str_mv | 10.1029/2009GL037525 |
| format | Article |
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G. ; Proshutinsky, A. ; Morison, J. H. ; Steele, M. ; Alkire, M. B.</creator><creatorcontrib>McPhee, M. G. ; Proshutinsky, A. ; Morison, J. H. ; Steele, M. ; Alkire, M. B.</creatorcontrib><description>The dramatic reduction in minimum Arctic sea ice extent in recent years has been accompanied by surprising changes in the thermohaline structure of the Arctic Ocean, with potentially important impact on convection in the North Atlantic and the meridional overturning circulation of the world ocean. Extensive aerial hydrographic surveys carried out in March–April, 2008, indicate major shifts in the amount and distribution of fresh‐water content (FWC) when compared with winter climatological values, including substantial freshening on the Pacific side of the Lomonosov Ridge. Measurements in the Canada and Makarov Basins suggest that total FWC there has increased by as much as 8,500 cubic kilometers in the area surveyed, effecting significant changes in the sea‐surface dynamic topography, with an increase of about 75% in steric level difference from the Canada to Eurasian Basins, and a major shift in both surface geostrophic currents and freshwater transport in the Beaufort Gyre.</description><identifier>ISSN: 0094-8276</identifier><identifier>EISSN: 1944-8007</identifier><identifier>DOI: 10.1029/2009GL037525</identifier><identifier>CODEN: GPRLAJ</identifier><language>eng</language><publisher>Washington, DC: Blackwell Publishing Ltd</publisher><subject>Arctic change ; Brackish ; Earth sciences ; Earth, ocean, space ; Exact sciences and technology ; Freshwater ; freshwater content ; Marine ; Oceanography ; Physical oceanography ; Sea ice ; Water content</subject><ispartof>Geophysical research letters, 2009-05, Vol.36 (10), p.n/a</ispartof><rights>Copyright 2009 by the American Geophysical Union.</rights><rights>2009 INIST-CNRS</rights><rights>Copyright 2009 by American Geophysical Union</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c5394-bee8ed20776d8c55439764f01b8dabbd9f4484470d97166cb082e3fe33a368623</citedby><cites>FETCH-LOGICAL-c5394-bee8ed20776d8c55439764f01b8dabbd9f4484470d97166cb082e3fe33a368623</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1029%2F2009GL037525$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1029%2F2009GL037525$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,780,784,1417,1433,11513,27923,27924,45573,45574,46408,46467,46832,46891</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=21630851$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>McPhee, M. 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| source | Wiley Free Content; Wiley-Blackwell AGU Digital Library; EZB-FREE-00999 freely available EZB journals; Wiley Online Library All Journals |
| subjects | Arctic change Brackish Earth sciences Earth, ocean, space Exact sciences and technology Freshwater freshwater content Marine Oceanography Physical oceanography Sea ice Water content |
| title | Rapid change in freshwater content of the Arctic Ocean |
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