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| Titel |
Role of cabbeling in water densification in the Greenland Basin |
| VerfasserIn |
Y. Kasajima, T. Johannessen |
| 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 ; 5, no. 3 ; Nr. 5, no. 3 (2009-07-14), S.247-257 |
| Datensatznummer |
250002575
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| Publikation (Nr.) |
 copernicus.org/os-5-247-2009.pdf |
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| Zusammenfassung |
| The effects of cabbeling mixing on water mass modification in the Greenland
Sea were explored by hydrographic observations across the Greenland Basin in
summer 2006. The neutral surface was chosen as a reference frame, and the
strength of cabbeling mixing was quantified by the dianeutral velocity
magnitude. Active cabbeling spots were detected with the criterion of the
velocity magnitude >1 m/day, and four active cabbeling areas were
identified; the west of Bear Island (SB), the Arctic Frontal Zone (AFZ), the
central Greenland Sea (CG) and the western Greenland Sea (WG). The most
vigorous cabbeling mixing was found at SB, where warm North Atlantic Water
(NAW) mixed with cold water from the Barents Sea, inducing a maximum
velocity of 7.5 m/day and a maximum density gain of 4.7×10−3 kg/m3.
At AFZ and CG, the mixing took place between NAW, modified NAW
and Arctic Intermediate Water (AIW), and the density gain at these fronts
were 1.5×10−3 kg/m3 (AFZ) and 1.3×10−3 kg/m3 (CG).
In the western Greenland Sea, the active cabbeling spots were widely
separated and mixing appeared to be rather weak, with a maximum velocity of
2.5 m/day. The mixing source waters at WG were modified NAW, AIW and even
denser water, and the density gain in this area was 0.4×10−3 kg/m3.
The deepest mixing produced water whose density is equivalent to
that of the dense water of the basin, indicating that cabbeling in the
western Greenland Sea contributed directly to basin-scale water
densification. The water mass modification rate was the highest at AFZ
(about 8.0 Sv), suggesting that cabbeling may play an important role in
water transformation in the Greenland Basin. |
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