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Please use this identifier to cite or link to this item:
http://hdl.handle.net/1956/628
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Full metadata record
| DC Field | Value | Language |
|---|
| contributor.author | Otterå, Odd Helge | - |
| contributor.author | Drange, Helge | - |
| date.accessioned | 2005-03-10T10:56:15Z | - |
| date.available | 2005-03-10T10:56:15Z | - |
| date.issued | 2004-03-15 | - |
| identifier.citation | http://www.iap.ac.cn/publ/aas/ | en |
| identifier.issn | 0256-1530 | - |
| identifier.uri | http://hdl.handle.net/1956/628 | - |
| description.abstract | Model studies point to enhanced warming and to increased freshwater fluxes to high northern
latitudes in response to global warming. In order to address possible feedbacks in the ice-ocean system
in response to such changes, the combined e ect of increased freshwater input to the Arctic Ocean and
Arctic warming—the latter manifested as a gradual melting of the Arctic sea ice—is examined using a
3-D isopycnic coordinate ocean general circulation model. A suite of three idealized experiments is carried
out: one control integration, one integration with a doubling of the modern Arctic river runo , and a third
more extreme case, where the river runo is five times the modern value. In the two freshwater cases, the
sea ice thickness is reduced by 1.5–2 m in the central Arctic Ocean over a 50-year period. The modelled
ocean response is qualitatively the same for both perturbation experiments: freshwater propagates into
the Atlantic Ocean and the Nordic Seas, leading to an initial weakening of the North Atlantic Drift.
Furthermore, changes in the geostrophic currents in the central Arctic and melting of the Arctic sea ice
lead to an intensified Beaufort Gyre, which in turn increases the southward volume transport through
the Canadian Archipelago. To compensate for this southward transport of mass, more warm and saline
Atlantic water is carried northward with the North Atlantic Drift. It is found that the increased transport
of salt into the northern North Atlantic and the Nordic Seas tends to counteract the impact of the increased
freshwater originating from the Arctic, leading to a stabilization of the North Atlantic Drift. | en |
| format.extent | 3409770 bytes | - |
| format.mimetype | application/pdf | - |
| language.iso | en | - |
| publisher | Science Press | en |
| relation.ispartofseries | Advances in Atmospheric Sciences;21( 5) | - |
| subject | Arctic Ocean | en |
| subject | freshwater | en |
| subject | seaice | en |
| subject | North Atlantic Drift | en |
| title | A Possible Feedback Mechanism Involving the Arctic Freshwater, the Arctic Sea Ice, and the North Atlantic Drift | en |
| type | Article | en |
| Appears in Collections: | Eprints by Nansen Environmental and Remote Sensing Center (NERSC)
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| File |
Size | Format |
|---|
| ott04_AAS.pdf | 3329Kb | Adobe PDF | View/Open |
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