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| Titel |
Atmospheric moisture transport: the bridge between ocean evaporation and Arctic ice melting |
| VerfasserIn |
L. Gimeno, M. Vázquez, R. Nieto, R. M. Trigo |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
2190-4979
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| Digitales Dokument |
URL |
| Erschienen |
In: Earth System Dynamics ; 6, no. 2 ; Nr. 6, no. 2 (2015-09-18), S.583-589 |
| Datensatznummer |
250115478
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| Publikation (Nr.) |
 copernicus.org/esd-6-583-2015.pdf |
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| Zusammenfassung |
| Changes in the atmospheric moisture transport have been proposed as a
vehicle for interpreting some of the most significant changes in the Arctic
region. The increasing moisture over the Arctic during the last decades is
not strongly associated with the evaporation that takes place within the
Arctic area itself, despite the fact that the sea ice cover is decreasing.
Such an increment is consistent and is more dependent on the transport of moisture
from the extratropical regions to the Arctic that has increased in recent
decades and is expected to increase within a warming climate. This increase
could be due either to changes in circulation patterns which have altered
the moisture sources, or to changes in the intensity of the moisture sources
because of enhanced evaporation, or a combination of these two mechanisms.
In this short communication we focus on the more objective assessment of the
strong link between ocean evaporation trends and Arctic Sea ice melting. We
will critically analyse several recent results suggesting links between
moisture transport and the extent of sea ice in the Arctic, this being one
of the most distinct indicators of continuous climate change both in the
Arctic and on a global scale. To do this we will use a sophisticated
Lagrangian approach to develop a more robust framework on some of these
previous disconnecting results, using new information and insights. Results
reached in this study stress the connection between two climate
change indicators, namely an increase in evaporation over source regions
(mainly the Mediterranean Sea, the North Atlantic Ocean and the North
Pacific Ocean in the paths of the global western boundary currents and their
extensions) and Arctic ice melting precursors. |
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