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| Titel |
Evidence of Greenland Sea Water at 24 degrees N from the Greenland Sea Tracer Experiment |
| VerfasserIn |
M.-J. Messias, A. J. Watson, P. J. Brown, B. A. King |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250070228
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| Zusammenfassung |
| Several plumes of the tracer sulphur hexafluoride (SF6) released in the Greenland Sea in
1996 were identified at 24°
N in the North Atlantic during a hydrographic section performed
in January 2010. The tracer was initially injected along the isopycnal Ïăθ= 28.045 kg/m3,
tagging warm and salty Greenland Sea Arctic Intermediate Water at around 300 m depth.
Subsequently, the tracer was found in the Icelandic Basin in 2001 and in the Irminger
Basin in 2003 within Iceland Scotland Overflow Water (ISOW) and Denmark Strait
Overflow Water (DSOW). The tracer plumes along 24°
N were respectively found in the
deepest part of the Florida Strait within DSOW, in the Deep Western Boundary
Current, and on the eastern side of the Mid-Atlantic Ridge within ISOW. These
observations reveals the presence of intermediate water from the Greenland Sea in North
Atlantic Deep Water as far south as 24Ë N with a transfer time upper limit of 13
years. The tagged ISOW core was observed between about 1200 and 2000 m depth
(27.65 kg/m3 < Ïăθ < 27.82 kg/m3) from 47Ë W to 40Ë W longitude, revealing a
relatively substantial southward flow along the eastern flank of the Mid-Atlantic Ridge. |
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