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| Titel |
Modeling future high-resolution dynamic sea level change |
| VerfasserIn |
Sandra-Esther Brunnabend, Henk A. Dijkstra, Michael A. Kliphuis, Ben van Werkhoven, Henri E. Bal, Maarten van Meersbergen, Frank Seinstra, Jason Maassen |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250103011
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| Publikation (Nr.) |
 EGU/EGU2015-2413.pdf |
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| Zusammenfassung |
| Different studies have shown that resolving ocean eddies and representing boundary currents
are of major importance when simulating changes in dynamic sea level on regional scale.
Therefore, we use the strongly eddying global model version of the Parallel Ocean Program
to simulate high-resolution future (up to the year 2100) sea surface height variations (SSH)
under the SRES-A1B atmospheric forcing scenario. Results show dynamic sea level changes
in the Southern Ocean that are caused by the southward shift in the westerly winds. The
warming ocean (global mean sea surface temperature rises by about 2°C over the period
2000-2100) leads to a strong reduction of the Atlantic Meridional Overturning
Circulation (AMOC). The magnitude of this reduction is affected by a feedback
involving the heat transport to the sub-polar gyre region and evaporation over the
North Atlantic region. The ocean circulation changes cause regional deviations from
global mean sea level change in the North Atlantic. At coastal regions of eastern
North America, dynamic sea level change leads to a positive deviation from global
mean sea level change in the order of several decimeters. In the sub-polar gyre
region a negative deviation from global mean sea level occurs. In the western North
Atlantic, not only mean regional sea level is changed but also its variability, caused
by shifted eddy pathways. This leads to a change in the frequency distribution of
SSH anomalies, which has important consequences for regional sea level extremes. |
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