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A Quantitative Description of the Norwegian Atlantic Current by Combining Altimetry and Hydrography : Volume 6, Issue 4 (22/10/2010)

By Mork, K. A.

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Book Id: WPLBN0004020486
Format Type: PDF Article :
File Size: Pages 11
Reproduction Date: 2015

Title: A Quantitative Description of the Norwegian Atlantic Current by Combining Altimetry and Hydrography : Volume 6, Issue 4 (22/10/2010)  
Author: Mork, K. A.
Volume: Vol. 6, Issue 4
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2010
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Mork, K. A., & Skagseth, Ø. (2010). A Quantitative Description of the Norwegian Atlantic Current by Combining Altimetry and Hydrography : Volume 6, Issue 4 (22/10/2010). Retrieved from http://www.worldlibrary.net/


Description
Description: Institute of Marine Research and Bjerknes Centre for Climate Research, Bergen, Norway. In this study, we quantified the mean flow and the variability in the Norwegian Atlantic Current (NwAC), including the individual branches, with associated error estimates. We accomplished this by combining repeated hydrographic data in the Svinøy section (at 62° N off the coast of Norway toward the northwest) with absolute dynamic sea surface topography data for the period from 1992–2009. The analysis shows a two-branched structure of the NwAC in this section, with calculated absolute velocities that are largely in accordance with the independent current measurements. The mean volume flux of the NwAC was estimated to be 5.1 ± 0.3 Sv (Sv = 106 m3 s−1). In terms of branches, the estimated 3.4 ± 0.3 Sv in the eastern branch is slightly below previous estimates. The estimated volume flux in the western branch is 1.7 ± 0.2 Sv, but a lack of robust estimates makes a comparison difficult. There is a significant seasonal cycle in the volume transport (the winter maximum is almost twice as large as the summer minimum) with a major contribution from the eastern branch. On the inter-annual scale, the volume flux and temperature are significantly and negatively correlated in both the western branch and in the total. Examining the results showed that increased volume flux is followed by a decrease in the stability of the upper water column, averaged over the Norwegian Sea, and a delay in the phytoplankton spring bloom at the Ocean Weather Station M (66° N, 2° E), by a lag of 1 year. The cause of this decrease in stability, whether a direct effect of the increased volume flux or a consequence of indirect effects, is however beyond the scope of this study.

Summary
A quantitative description of the Norwegian Atlantic Current by combining altimetry and hydrography

Excerpt
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