| 中国西部积雪对我国汛期降水的影响 |
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| 引用本文： | 韦志刚,罗四维.中国西部积雪对我国汛期降水的影响[J].高原气象,1993,12(4):347-354. |
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| 作者姓名： | 韦志刚 罗四维 |
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| 作者单位： | 中国科学院兰州高原大气物理研究所，中国科学院兰州高原大气物理研究所 甘肃省 兰州市730000，甘肃省 兰州市730000 |
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| 基金项目： | 中国科学院“八五”重大科研项目KY85-10-222资助 |
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| 摘 要： | 本文利用台站及卫星资料建立了中国西部积雪３０年逐月时间序列。该序列是目前资料时间最长、最好的序列，为研究该区积雪月际和年际变化及其影响提供了较可靠的依据。中国西部冬春积雪对我国汛期降水的影响平均为负相关趋势，与６月降水的相关分布较有规律，冬春多（少），其它地区６月降水偏多（少）。我国西部多（少）雪对６月从份５００ｈＰａ高度的变化是：高原北边高纬高度降低（升高）及副热地区升高（降低），有（不）利于高
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| 关 键 词： | 西部 积雪 汛期降水 气候特征 中国 |
INFLUENCE OF SNOW COVER IN WESTERN CHINA ON PRECIPITATION IN THE FLOOD PERIOD IN CHINA |
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| Wei Zhigang Luo Siwei.INFLUENCE OF SNOW COVER IN WESTERN CHINA ON PRECIPITATION IN THE FLOOD PERIOD IN CHINA[J].Plateau Meteorology,1993,12(4):347-354. |
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| Authors: | Wei Zhigang Luo Siwei |
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| Abstract: | In this paper the monthly data series of snow cover in western China for 30 years have been built by satellite and ground data. It is the best and longest at present and has supplied better base to study monthly and annual variations. The correlation coefficients between the snow cover in winter and spring in western China and the precipitation during flood period are negative in the mean. Its distribution in June is more regular. When the snow in winter and spring is more (less), the precipitation in June is less (more) in the southern of China, the Qinghai-Xizang Plateau and the upstream of Yangtze River, and more (less) in the other area. When geopotential height at 500 hPa in June in more (less) snow years is dropped(risen) over northern Qinghai-Xizang Plateau, risen(dropped) over subtropic, and this is (not) advantageous to the cold air in high latitude area moving southward and the subtropical ridge moving westward and northward. Then the precipitation increase(decrease) in north of the midstream and downstream of Yangtze River, and decrease (increase) in the southern China, the Qinghai- Xizang Plateau and upperstream of Yangtze River. |
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| Keywords: | Snow cover in western China Precipitation during flood period Climatic characteristics |
| 本文献已被 CNKI 维普 等数据库收录！ |
