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| Titel |
Modeling ocean and sea ice dynamics of the Canadian Arctic Archipelago: Aspects of forcing |
| VerfasserIn |
Claudia Wekerle, Qiang Wang, Sergey Danilov, Paul G. Myers, Thomas Jung, Jens Schröter |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250079507
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| Zusammenfassung |
| The Canadian Arctic Archipelago (CAA) is one of the main pathways for freshwater exiting
the Arctic Ocean. Freshwater exported to the North Atlantic may influence the
deep water formation in the Labrador Sea, and thus the meridional overturning
circulation.
Modeling ocean and sea ice conditions of the CAA is difficult because of narrow
straits and complex coastlines. The Finite-Element Sea-ice Ocean circulation Model
(FESOM) configured on a global mesh is applied to assess the volume, freshwater
and sea ice transports through the CAA. With a mesh resolution of 5 km in the
CAA we are able to accurately resolve complex coastlines. Outside the CAA the
mesh is refined to 24 km north of 55°N with a global background resolution of
1.5°.
In this study, first, it is shown that the transports modeled with FESOM correlate well with
the available observational data. Second, the model is used to learn about the impact of
different atmospheric forcing datasets differing in spatial and temporal resolution (CORE 2
and the Reforecast dataset from Environment Canada). The CORE 2 dataset is on the T62
grid, which is coarse compared to the Reforecast dataset with grid resolution of 0.45°
longitude and 0.3° latitude. The temporal resolution of the Reforecast dataset is higher
than the CORE 2 dataset (one hourly and 6-hourly data, respectively, for wind,
surface temperature and specific humidity fields). The representation of sea ice
in the CAA can be improved by using the high resolution atmospheric forcing. |
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