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Response of the Denmark Strait overflow to Nordic Seas heat loss

Response of the Denmark Strait overflow to Nordic Seas heat loss
Response of the Denmark Strait overflow to Nordic Seas heat loss
The impact of extreme Nordic Seas heat loss on Denmark Strait (DS) dense water transport is examined in (1) control runs of the Hadley Centre HadCM3 and HadGEM1 coupled climate models and (2) perturbation experiments with the fast coupled model FORTE that allow heat flux effects to be isolated from wind stress. All three models show an approximately linear increase in southward DS transport of cold dense water with increasing Nordic Seas winter heat loss in the range ?80 to ?250 Wm?2. The propagation of the cold anomaly from the Nordic Seas source along a trajectory through the DS and into the Irminger Basin is also examined. A common response time is found with the strongest decrease in DS temperature occurring within 8–12 months of the heat loss signal. Our results show that Nordic Seas heat loss must be considered in addition to other processes in understanding DS variability.

surface fluxes, denmark strait, nordic seas
0148-0227
C09019-[9pp]
Grist, Jeremy P.
ffea99af-f811-436f-9bac-5b02ba6dc00f
Josey, Simon A.
2252ab7f-5cd2-49fd-a951-aece44553d93
Sinha, Bablu
544b5a07-3d74-464b-9470-a68c69bd722e
Blaker, Adam T.
94efe8b2-c744-4e90-87d7-db19ffa41200
Grist, Jeremy P.
ffea99af-f811-436f-9bac-5b02ba6dc00f
Josey, Simon A.
2252ab7f-5cd2-49fd-a951-aece44553d93
Sinha, Bablu
544b5a07-3d74-464b-9470-a68c69bd722e
Blaker, Adam T.
94efe8b2-c744-4e90-87d7-db19ffa41200

Grist, Jeremy P., Josey, Simon A., Sinha, Bablu and Blaker, Adam T. (2008) Response of the Denmark Strait overflow to Nordic Seas heat loss. Journal of Geophysical Research, 113 (C9), C09019-[9pp]. (doi:10.1029/2007JC004625).

Record type: Article

Abstract

The impact of extreme Nordic Seas heat loss on Denmark Strait (DS) dense water transport is examined in (1) control runs of the Hadley Centre HadCM3 and HadGEM1 coupled climate models and (2) perturbation experiments with the fast coupled model FORTE that allow heat flux effects to be isolated from wind stress. All three models show an approximately linear increase in southward DS transport of cold dense water with increasing Nordic Seas winter heat loss in the range ?80 to ?250 Wm?2. The propagation of the cold anomaly from the Nordic Seas source along a trajectory through the DS and into the Irminger Basin is also examined. A common response time is found with the strongest decrease in DS temperature occurring within 8–12 months of the heat loss signal. Our results show that Nordic Seas heat loss must be considered in addition to other processes in understanding DS variability.

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More information

e-pub ahead of print date: 10 September 2008
Published date: September 2008
Keywords: surface fluxes, denmark strait, nordic seas

Identifiers

Local EPrints ID: 64011
URI: http://eprints.soton.ac.uk/id/eprint/64011
ISSN: 0148-0227
PURE UUID: e7c2fbce-5814-4f0a-8786-fd90c3487b9d

Catalogue record

Date deposited: 24 Nov 2008
Last modified: 15 Mar 2024 11:45

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Contributors

Author: Jeremy P. Grist
Author: Simon A. Josey
Author: Bablu Sinha
Author: Adam T. Blaker

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