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| Titel |
The role of subpolar atmosphere-ice-ocean interactions in D-O cycles |
| VerfasserIn |
Camille Li, Andreas Born |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250146042
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| Publikation (Nr.) |
 EGU/EGU2017-10033.pdf |
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| Zusammenfassung |
| Sea ice has long been thought to play an important role in D-O cycles
because of its strong influence on regional temperature and its ability
to grow and melt rapidly in response to relatively weak forcings. One
recent idea based on modelling experiments is that D-O-related sea ice
displacements are part of an unforced, coupled oscillation of the North
Atlantic atmosphere-ice-ocean system. Here, we present an overview of
key components of this system, as well as observational and modelling
results addressing how they function in today’s climate, and how glacial
climate conditions might alter their functioning to allow D-O cycles to
occur. Of specific interest are the necessary changes in the subpolar
gyre, the thermohaline structure and stratification of the Nordic Seas,
the existence of an Arctic-like cold halocline at subpolar latitudes,
and the accessibility of the subsurface ocean heat reservoir to the
atmosphere. Broader consequences for the Atlantic thermohaline
circulation and Southern Hemisphere climate signals will be discussed. |
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