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| Titel |
Reconstruction and analysis of QuikSCAT wind measurements with an EOF-based technique |
| VerfasserIn |
C. Troupin, A. Alvera-Azcárate, J.-M. Beckers |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250063085
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| Zusammenfassung |
| The SeaWinds sensor aboard the QuikSCAT satellite provided wind measurements over the
world ocean until November 2009. Every day, about 90% of Earth’s oceans was covered.
Thanks to its spatial and temporal resolution, the QuikSCAT wind products are often used to
provide numerical model atmospheric forcing.
However, due to the configuration of the satellite swaths, gaps are frequently observed in
the daily wind maps. Our objective here is to apply an iterative reconstruction of the
wind fields using an EOF-based method called DINEOF. The method works on a
time series of images and aims to compute the wind values using a truncated EOF
decomposition.
The method is applied on the wind intensity, direction and zonal/meridional components,
and with different combinations of them, in order to determine the best choice, regarding the
reconstructed field and the convergence of the method. In particular we will focus on the
ocean region off northwestern African where wind drives several processes such as coastal
upwelling, filaments and island eddies.
The principal modes are interpreted and compared with the results obtained with sea
surface temperature in the same region. |
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