ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Analysis and Medium-Range Forecast for Mei-yu Events over the Changjiang-Huaihe River Basin in 2000
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Abstract:
The circulation features during the 2000 Jianghuai mei-yu period suggested that at the beginning of mei-yu event,the seasonal northward moving of the 120°E ridge of western Pacific subtropical high has a evident 2-week oscillation period;both the northward moving to 25°N of the ridge of South Asia high and the onset of Indian monsoon -the end of stable Calcutta westerly obviously foretell the beginning of Jianghuai mei-yu. At the end of mei yu period,the continuous northward moving to 47 5°N of the geostrophic wind jet axis of Asia region during the meiyu season,regulation of stable ultra-long wave ridge of 50°N superposing wave was earlier than that of western Pacific subtropical high and the northward moving of typhoon 0003 occurred in the eastern ocean surface of Philippine in the late period of mei yu season significantly contributed to the circulation regulation of the end of mei-yu.
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