366 ACTA METEOROLOGICA SINICA VOL.21 Characteristics of Two General Circulation Patterns During Floods over the Changjiang-Huaihe River Valley
Characteristics of the atmospheric general circulation during the catastrophic oods over the Changjiang-Huaihe River Valley (CHRV) are investigated. There are two precipitation patterns over China in the CHRV ood years: the CHRV ood-whole country-wet (P1) pattern and the CHRV ood-south (north) side-...
| Main Authors: | , |
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| Format: | Text |
| Language: | English |
| Published: |
2007
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| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.595.5357 http://www.cms1924.org/Attachment/Doc/1192418882.pdf |
| Summary: | Characteristics of the atmospheric general circulation during the catastrophic oods over the Changjiang-Huaihe River Valley (CHRV) are investigated. There are two precipitation patterns over China in the CHRV ood years: the CHRV ood-whole country-wet (P1) pattern and the CHRV ood-south (north) side-dry (P2) pattern. The circulation analysis results show that there are obvious dierences between the NH 500-hPa geopotential height elds of P1 and P2 precipitation patterns. The establishment of East Asia-Atlantic (EAA) correlation chain (the South China Sea (SCS) highthe Meiyu troughthe Okhotsk Sea high over East Asia) is a critical condition for excessive summer precipitation over the CHRV, while the European blocking high plays an important role in determining the precipitation pattern over China in the CHRV ood years. Besides, the relation between the EAA correlation chain and the sea surface temperature anomaly (SSTA) in the North Pacic is also studied. Key words: ood, circulation characteristics, blocking high, sea surface temperature |
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