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| Titel |
Analysis of the 2008 heavy snowfall over South China using GPS PWV measurements from the Tibetan Plateau |
| VerfasserIn |
Y. Xie, F. Wei, G. Chen, T. Zhang, L. Hu |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 28, no. 6 ; Nr. 28, no. 6 (2010-06-25), S.1369-1376 |
| Datensatznummer |
250016852
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| Publikation (Nr.) |
 copernicus.org/angeo-28-1369-2010.pdf |
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| Zusammenfassung |
| Four successive storms with freezing rain and snow blanketed South China
from 10 January–2 February 2008, when the precipitation increased more than
200%–300% above the average for the corresponding period. The unusual
atmospheric circulation associated with these disasters was caused by many
complex physical processes, one of which was the active southern branch of
currents over low latitude ocean areas which provided plenty of water vapor
for South China. The ground-based GPS Precipitable Water Vapor (PWV)
measurements on the Tibetan Plateau, supported by the China and Japan
Intergovernmental Cooperation Program (JICA), has compensated for the lack
of conventional observations of atmospheric water vapor in this area and
provided a good opportunity to analyze the character of the water vapor
transport in the four heavy precipitation processes. It was found that the
GPS stations located on the southeastern Tibetan Plateau were on the route
of the water vapor transport during 25 January–29 January and 31 January–2 February when two heavy
precipitation events occurred over South China. The increasing trend from
the one to two days pre-observation by the GPS stations was then associated
with the heavy precipitation. Precipitation during 10 January–16 January and 18
January–22 January
was significantly related to the abnormal variation of the one day
pre-observation by the GPS stations located on the northeastern Tibetan
Plateau. This research indicates that ground-based GPS measurements are
applicable to data assimilation in operational numerical models. |
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