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| Titel |
Southern hemisphere low level wind circulation statisticsfrom the Seasat scatterometer |
| VerfasserIn |
Gad Levy |
| 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 ; 12, no. 1 ; Nr. 12, no. 1, S.65-79 |
| Datensatznummer |
250010396
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| Publikation (Nr.) |
 copernicus.org/angeo-12-65-1994.pdf |
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| Zusammenfassung |
| Analyses of remotely sensed low-level wind
vector data over the Southern Ocean are performed. Five-day averages and monthly
means are created and the month-to-month variability during the winter
(July-September) of 1978 is investigated. The remotely sensed winds are compared
to the Australian Bureau of Meteorology (ABM) and the National Meteorological
Center (NMC) surface analyses. In southern latitudes the remotely sensed winds
are stronger than what the weather services' analyses suggest, indicating
underestimation by ABM and NMC in these regions. The evolution of the low-level
jet and the major stormtracks during the season are studied and different flow
regimes are identified. The large-scale variability of the meridional flow is
studied with the aid of empirical orthogonal function (EOF) analysis. The
dominance of quasi-stationary wave numbers 3, 4, and 5 in the winter flow is
evident in both the EOF analysis and the mean flow. The signature of an
exceptionally strong blocking situation is evident in July and the special
conditions leading to it are discussed. A very large intraseasonal variability
with different flow regimes at different months is documented. |
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