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| Titel |
Impact of environmental moisture on tropical cyclone intensification |
| VerfasserIn |
L. Wu, H. Su, R. G. Fovell, T. J. Dunkerton, Z. Wang, B. H. Kahn |
| 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 ; 15, no. 24 ; Nr. 15, no. 24 (2015-12-21), S.14041-14053 |
| Datensatznummer |
250120238
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| Publikation (Nr.) |
 copernicus.org/acp-15-14041-2015.pdf |
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| Zusammenfassung |
| The impacts of environmental moisture on the intensification of a tropical
cyclone (TC) are investigated in the Weather Research and Forecasting (WRF)
model, with a focus on the azimuthal asymmetry of the moisture impacts
relative to the storm path. A series of sensitivity experiments with varying
moisture perturbations in the environment are conducted and the Marsupial
Paradigm framework is employed to understand the different moisture impacts.
We find that modification of environmental moisture has insignificant
impacts on the storm in this case unless it leads to convective activity
that deforms the quasi-Lagrangian boundary of the storm and changes the
moisture transport into the storm. By facilitating convection and
precipitation outside the storm, enhanced environmental moisture ahead of
the northwestward-moving storm induces a dry air intrusion to the inner core
and limits TC intensification. In contrast, increased moisture in the rear
quadrants favors intensification by providing more moisture to the inner
core and promoting storm symmetry, with primary contributions coming from
moisture increase in the boundary layer. The different impacts of
environmental moisture on TC intensification are governed by the relative
locations of moisture perturbations and their interactions with the storm
Lagrangian structure. |
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