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| Titel |
Environment and morphology of mesoscale convective systems associated with the Changma front during 9–10 July 2007 |
| VerfasserIn |
J.-H. Jeong, D.-I. Lee, C.-C. Wang, S.-M. Jang, C.-H. You, M. Jang |
| 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 ; 30, no. 8 ; Nr. 30, no. 8 (2012-08-22), S.1235-1248 |
| Datensatznummer |
250017257
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| Publikation (Nr.) |
 copernicus.org/angeo-30-1235-2012.pdf |
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| Zusammenfassung |
To understand the different environment and morphology for heavy rainfall
during 9–10 July 2007, over the Korean Peninsula, mesoscale convective
systems (MCSs) that accompanied the Changma front in two different regions
were investigated. The sub-synoptic conditions were analysed using mesoscale
analysis data (MANAL), reanalysis data, weather charts and Multi-functional
Transport Satellite (MTSAT-IR) data. Dual-Doppler radar observations were
used to analyse the wind fields within the precipitation systems. During
both the case periods, the surface low-pressure field intensified and moved
northeastward along the Changma front. A low-level warm front gradually
formed with an east-west orientation, and the cold front near the low
pressure was aligned from northeast to southwest.
The northern convective systems (meso-α-scale) were embedded within
an area of stratiform cloud north of the warm front. The development of
low-level pressure resulted in horizontal and vertical wind shear due to
cyclonic circulation. The wind direction was apparently different across the
warm front. In addition, the southeasterly flow (below 4 km) played an
important role in generating new convective cells behind the prevailing
convective cell. Each isolated southern convective cell (meso-β-scale)
moved along the line ahead of the cold front within the prefrontal
warm sector. These convective cells developed when a strong southwesterly
low-level jet (LLJ) intensified and moisture was deeply advected into the
sloping frontal zone. A high equivalent potential temperature region
transported warm moist air in a strong southwesterly flow, where the
convectively unstable air led to updraft and downdraft with a strong
reflectivity core. |
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