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| Titel |
Horizontal divergence of typhoon-generated gravity waves in the upper troposphere and lower stratosphere (UTLS) and its influence on typhoon evolution |
| VerfasserIn |
S. H. Kim, H.-Y. Chun, W. Jang |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 14, no. 7 ; Nr. 14, no. 7 (2014-04-01), S.3175-3182 |
| Datensatznummer |
250118553
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| Publikation (Nr.) |
 copernicus.org/acp-14-3175-2014.pdf |
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| Zusammenfassung |
| The characteristics of horizontal divergence induced by typhoon-generated
gravity waves (HDTGWs) and the influence of HDTGW on typhoon evolution are
investigated based on the simulation results of Typhoon Saomai (2006) using
the Weather Research and Forecasting (WRF) model. The power spectral density
of HDTGW shows dominant powers at horizontal wavelengths of 20–30 km and at
periods of less than 1 h. This is associated with gravity waves
generated by vigorous convective clouds in an inner core region of the
typhoon. However, the domain-averaged HDTGW in the upper troposphere and
lower stratosphere had a spectral peak at 24 h, which is well correlated
with the minimum sea-level pressure of the typhoon, especially during a
rapidly developing period. The 24 h period of the averaged HDTGW stems
from the inertia–gravity waves generated by the convective clouds in the
spiral rainbands, and showed no clear association with the thermal tides or
the diurnal variation of precipitation. |
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