Wind-driven monthly variations in transport and the flow field in the Faroe–Shetland Channel

Polar research

Bogi Hansen¹  William R. Turrell²  Sarah L. Hughes²  Svein Østerhus³  Toby J. Sherwin⁴ 

[1] Faroese Fisheries Laboratory, Box 3051, FO-110, Torshavn, Faroe;Fisheries Research Services, Marine Laboratory, 375 Victoria Road, Aberdeen, AB11 9DB, UK;Geophysical Institute, University of Bergen, NO-5014, Bergen, Norway;Scottish Association of Marine Science, Dunstaffnage Marine Laboratory, Oban, Argyll, PA37 1QA, UKCorrespondence

关键词: Meridional Overturning Circulation;    North Atlantic;    currents;    seasonal variability.;   

DOI  :  10.1111/j.1751-8369.2007.00036.x

学科分类：自然科学（综合）

来源: Co-Action Publishing

【 摘 要 】

The transport of water from the North Atlantic to the Nordic seas through the Faroe–Shetland Channel is analysed from a decade of conductivity, temperature and depth (CTD) and acoustic Doppler current profiler (ADCP) data. The long-term mean transport, integrated over the upper 500 m, is 3.5 ± 0.1 Sv (1 Sv =106m3s-1), of which 2.1 Sv is barotropic flow and 1.4 Sv is baroclinic flow. Short-term variability leads to a standard deviation of ca. 2.2 Sv in 3-day averages of the ADCP-measured transport. The barotropic transport is located over the upper part of the slope region of the Shetland Shelf, but sometimes broadens over deeper water. There is a peak surface baroclinic transport above the foot of the slope, and a weak recirculation of Modified North Atlantic Water (MNAW), which enters from the north, on the Faroese side. In September, when isobars downwell on the eastern side, the strong transport (ca. 4 Sv) is barotropic and evenly distributed across the Shetland slope, and both recirculation of MNAW fr...

【 授权许可】

CC BY-NC