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Possible predictability in overflow from the Denmark Strait (1999)

Meincke, Jens ; Vassie, Ian ; Jungclaus, Johann ; [weitere]

[s.l.] : Macmillan Magazines Ltd.

Nature 397 (1999), S. 243-246

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] The overflow and descent of cold dense water from the Denmark Strait sill — a submarine passage between Greenland and Iceland — is a principal means by which the deep ocean is ventilated, and is an important element in the global thermohaline circulation. Previous investigations of ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/16680

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Digitale Medien

Surprisingly rapid spreading of newly formed intermediate waters across the North Atlantic Ocean (1997)

Sy, Alexander ; Rhein, Monika ; Lazier, John R. N. ; [weitere]

[s.l.] : Nature Publishing Group

Nature 386 (1997), S. 675-679

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] Ocean temperature, salinity and chlorofluorocarbon concentration data are used to track the recent spreading of cold intermediate-depth water masses from the Labrador Sea across the northern North Atlantic Ocean. These water masses, which are formed from surface waters by deep convection in ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/386675a0

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Possible predictability in overflow from the Denmark Strait (1999)

Dickson, B. ; Meincke, Jens ; Vassle, I. ; [weitere]

Nature Publishing Group

In: Nature, 397 . pp. 243-246.

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Publikationsdatum: 2017-02-28

Beschreibung: The overflow and descent of cold dense water from the Denmark Strait sill-a submarine passage between Greenland and Iceland-is a principal means by which the deep ocean is ventilated, and is an important element in the global thermohaline circulation. Previous investigations of its variability-in particular, direct current measurements(1,2) in the overflow core since 1986-have shown surprisingly little evidence of long-term changes in now speed. Here we report significant changes in the overflow characteristics during the winter of 1996-97, measured using two current-meter moorings and an inverted echo sounder located at different depths in the fastest part of the now. The overflow warmed to the highest monthly value yet recorded (2.4 degrees C), and showed a pronounced slowing and thinning at its lower margin. We believe that the extreme warmth of the overflow caused it to run higher on the continental slope off east Greenland, so that the lower current meters and the echo sounder were temporarily outside and deeper than the fast-flowing core; model simulations appear to confirm this interpretation, We suggest that the extreme warmth of the overflow is a lagged response to a warming upstream in the Fram Strait three years earlier (caused by an exceptional amplification of the winter North Atlantic Oscillation). If this is so, over-now characteristics may be predictable.

Materialart: Article , PeerReviewed

Format: text

DOI: 10.1038/16680

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