Role of Greenland Sea Gyre Circulation on Atlantic Water Temperature Variability in the Fram Strait
Abstract Atlantic Water (AW) transported from the Nordic Seas is the major source of oceanic heat to the Arctic Ocean. Based on results from the TOPAZ reanalysis, a regional coupled ice‐ocean data assimilation system, we show that interannual variability of AW temperature in the Fram Strait (FS) is...
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| Format: | Article |
| Language: | English |
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Wiley
2018-08-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2018GL079174 |
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| author | Sourav Chatterjee Roshin P. Raj L. Bertino Ø. Skagseth M. Ravichandran Ola M. Johannessen |
| author_facet | Sourav Chatterjee Roshin P. Raj L. Bertino Ø. Skagseth M. Ravichandran Ola M. Johannessen |
| author_sort | Sourav Chatterjee |
| collection | DOAJ |
| description | Abstract Atlantic Water (AW) transported from the Nordic Seas is the major source of oceanic heat to the Arctic Ocean. Based on results from the TOPAZ reanalysis, a regional coupled ice‐ocean data assimilation system, we show that interannual variability of AW temperature in the Fram Strait (FS) is associated with the strength of the Greenland Sea gyre (GSG) circulation. The response of the GSG to the anomalous wind stress curl over the Nordic Seas modifies the AW inflow and thus influences the variability of AW temperature in the FS. A stronger (weaker) GSG circulation increases (decreases) the AW flow speed toward FS, leading to increased (decreased) oceanic heat content and higher (lower) AW temperature therein. This implies that the Nordic Seas circulation is not only a passive conduit of AW, but its response to overlying atmospheric variability can also largely influence the AW temperature in the FS by modifying the transport of AW. |
| format | Article |
| id | doaj-art-59d16e6dfd044d95b3d7f4925bfafb40 |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2018-08-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-59d16e6dfd044d95b3d7f4925bfafb402025-08-20T02:46:20ZengWileyGeophysical Research Letters0094-82761944-80072018-08-0145168399840610.1029/2018GL079174Role of Greenland Sea Gyre Circulation on Atlantic Water Temperature Variability in the Fram StraitSourav Chatterjee0Roshin P. Raj1L. Bertino2Ø. Skagseth3M. Ravichandran4Ola M. Johannessen5National Centre for Antarctic and Ocean Research Vasco‐da‐Gama IndiaNansen Environmental and Remote Sensing Center Bergen NorwayNansen Environmental and Remote Sensing Center Bergen NorwayBjerknes Center for Climate Research Bergen NorwayNational Centre for Antarctic and Ocean Research Vasco‐da‐Gama IndiaNansen Scientific Society Bergen NorwayAbstract Atlantic Water (AW) transported from the Nordic Seas is the major source of oceanic heat to the Arctic Ocean. Based on results from the TOPAZ reanalysis, a regional coupled ice‐ocean data assimilation system, we show that interannual variability of AW temperature in the Fram Strait (FS) is associated with the strength of the Greenland Sea gyre (GSG) circulation. The response of the GSG to the anomalous wind stress curl over the Nordic Seas modifies the AW inflow and thus influences the variability of AW temperature in the FS. A stronger (weaker) GSG circulation increases (decreases) the AW flow speed toward FS, leading to increased (decreased) oceanic heat content and higher (lower) AW temperature therein. This implies that the Nordic Seas circulation is not only a passive conduit of AW, but its response to overlying atmospheric variability can also largely influence the AW temperature in the FS by modifying the transport of AW.https://doi.org/10.1029/2018GL079174Fram StraitAtlantic WaterGreenland Sea gyreatmospheric forcing |
| spellingShingle | Sourav Chatterjee Roshin P. Raj L. Bertino Ø. Skagseth M. Ravichandran Ola M. Johannessen Role of Greenland Sea Gyre Circulation on Atlantic Water Temperature Variability in the Fram Strait Geophysical Research Letters Fram Strait Atlantic Water Greenland Sea gyre atmospheric forcing |
| title | Role of Greenland Sea Gyre Circulation on Atlantic Water Temperature Variability in the Fram Strait |
| title_full | Role of Greenland Sea Gyre Circulation on Atlantic Water Temperature Variability in the Fram Strait |
| title_fullStr | Role of Greenland Sea Gyre Circulation on Atlantic Water Temperature Variability in the Fram Strait |
| title_full_unstemmed | Role of Greenland Sea Gyre Circulation on Atlantic Water Temperature Variability in the Fram Strait |
| title_short | Role of Greenland Sea Gyre Circulation on Atlantic Water Temperature Variability in the Fram Strait |
| title_sort | role of greenland sea gyre circulation on atlantic water temperature variability in the fram strait |
| topic | Fram Strait Atlantic Water Greenland Sea gyre atmospheric forcing |
| url | https://doi.org/10.1029/2018GL079174 |
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