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Publication . Article . 2005

Impact of North Atlantic Current changes on the Nordic Seas and the Arctic Ocean

Frank Kauker; Rüdiger Gerdes; Michael Karcher; Cornelia Köberle;
Open Access  
Published: 02 Dec 2005 Journal: Journal of Geophysical Research, volume 110 (issn: 0148-0227, Copyright policy )
Publisher: American Geophysical Union (AGU)
Country: Germany
Abstract
[1] The impact of North Atlantic Current (NAC) volume, heat, and salt transport variability onto the Nordic Seas and the Arctic Ocean is investigated using numerical hindcast and sensitivity experiments. The ocean-sea ice model reproduces observed propagation pathways and speeds of SST anomalies. Signals reaching the entrance to the Nordic Seas between Iceland and Scotland originate partly in the lower-latitude North Atlantic. Response experiments with different prescribed conditions at 50°N show that changes in the barotropic flow across 50°N have no impact on the seas north of the Greenland-Scotland Ridge because of the strong deformation of the f/H field. A temperature anomaly inserted in the upper 500 m at 50°N, on the other hand, has a widespread effect on the temperature distribution and the circulation in the high-latitude North Atlantic. NAC induced variability in the Nordic Seas and locally induced variability have similar magnitude. The local atmospheric influence and the complexity of North Atlantic-Nordic Seas advection pathways make it unlikely that detection of signal propagation in the NAC could lead to a prediction of oceanic conditions in the Nordic Seas and the Arctic Ocean with several years lead time.
Subjects by Vocabulary

Microsoft Academic Graph classification: Groenlandia biology.organism_classification biology Lead (sea ice) Arctic dipole anomaly Sea surface temperature Geology Oceanography North Atlantic Deep Water Advection Hindcast Sea ice geography.geographical_feature_category geography

Subjects

Paleontology, Space and Planetary Science, Earth and Planetary Sciences (miscellaneous), Atmospheric Science, Earth-Surface Processes, Geochemistry and Petrology, Soil Science, Water Science and Technology, Ecology, Aquatic Science, Forestry, Oceanography, Geophysics

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Funded by
NSF| Cooperative Agreement Between IARC and NSF
Project
  • Funder: National Science Foundation (NSF)
  • Project Code: 0002239
  • Funding stream: Directorate for Geosciences | Division of Polar Programs