期刊
CHINESE SCIENCE BULLETIN
卷 47, 期 9, 页码 779-786出版社
SCIENCE CHINA PRESS
DOI: 10.1360/02tb9176
关键词
mid- and lower reaches of Yangtze River; heavy rains; great floods; monsoon moisture surge; phase lock
Meteorological conditions associated with intense rainfall and great floods over mid- and lower reaches of Yangtze River are studied by analyzing the large-, synoptic- and meso-alpha-scale circulation systems for 1991, 1996 and 1998. It is found that the advance and retreat of subtropical high over the West Pacific, the monsoon moisture surge from the South China Sea, cold air outbreak over mid- and high-latitudes, and the meso-alpha scale systems (250-2500 km) from the Tibetan Pleateau as well, are responsible for intense rainfall over the Yangtze River Valley. The persistent and heavy rains and great floods over the Yangtze River Valley occurred when all these four systems are synergetic or in phase lock.
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