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| Titel |
How does ocean ventilation change under global warming? |
| VerfasserIn |
A. Gnanadesikan, J. L. Russell, Fanrong Zeng |
| 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 ; 3, no. 1 ; Nr. 3, no. 1 (2007-02-06), S.43-53 |
| Datensatznummer |
250000765
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| Publikation (Nr.) |
 copernicus.org/os-3-43-2007.pdf |
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| Zusammenfassung |
| Since the upper ocean takes up much of the heat added to the earth system
by anthropogenic global warming, one would expect that global warming would
lead to an increase in stratification and a decrease in the ventilation of
the ocean interior. However, multiple simulations in global coupled climate
models using an ideal age tracer which is set to zero in the mixed layer and
ages at 1 yr/yr outside this layer show that the intermediate depths in the
low latitudes, Northwest Atlantic, and parts of the Arctic Ocean
become younger under global warming. This paper reconciles these
apparently contradictory trends, showing that the decreases result from
changes in the relative contributions of old deep waters and younger surface
waters. Implications for the tropical oxygen minimum zones, which play
a critical role in global biogeochemical cycling are considered in
detail. |
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