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| Titel |
Combining in situ measurements and altimetry to estimate volume, heat and salt transport variability through the Faroe–Shetland Channel |
| VerfasserIn |
B. Berx, B. Hansen, S. Østerhus, K. M. Larsen, T. Sherwin, K. Jochumsen |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1812-0784
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| Digitales Dokument |
URL |
| Erschienen |
In: Ocean Science ; 9, no. 4 ; Nr. 9, no. 4 (2013-07-09), S.639-654 |
| Datensatznummer |
250018109
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| Publikation (Nr.) |
 copernicus.org/os-9-639-2013.pdf |
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| Zusammenfassung |
| From 1994 to 2011, instruments measuring ocean currents (Acoustic Doppler
Current Profilers; ADCPs) have been moored on a section crossing the
Faroe–Shetland Channel. Together with CTD (Conductivity Temperature Depth)
measurements from regular research vessel occupations, they describe the flow
field and water mass structure in the channel. Here, we use these data to
calculate the average volume transport and properties of the flow of warm
water through the channel from the Atlantic towards the Arctic, termed the
Atlantic inflow. We find the average volume transport of this flow to be
2.7 ± 0.5 Sv (1 Sv = 106 m3 s–1) between the shelf
edge on the Faroe side and the 150 m isobath on the Shetland side. The
average heat transport (relative to 0 °C) was estimated to be
107 ± 21 TW (1 TW = 1012 W) and the average salt import to be
98 ± 20 × 106 kg s−1. Transport values for
individual months, based on the ADCP data, include a large level of
variability, but can be used to calibrate sea level height data from
satellite altimetry. In this way, a time series of volume transport has been
generated back to the beginning of satellite altimetry in December 1992. The
Atlantic inflow has a seasonal variation in volume transport that peaks
around the turn of the year and has an amplitude of 0.7 Sv. The Atlantic
inflow has become warmer and more saline since 1994, but no equivalent trend
in volume transport was observed. |
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