| 近52年我国各强度降雪的时空分布特征 |
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| 引用本文： | 臧海佳.近52年我国各强度降雪的时空分布特征[J].安徽农业科学,2009,37(13):6064-6066. |
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| 作者姓名： | 臧海佳 |
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| 作者单位： | 北京大学物理学院大气科学系,北京,100871;国家气象信息中心,北京,100081 |
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| 摘 要： | 利用1954～2005年我国674个气象台站的逐日降雨量和天气现象观测资料，构建了全国范围的小雪、中雪、大雪、暴雪和特大暴雪序列，分析了中国各强度降雪的时空变化规律。结果表明：①我国年平均降雪日数超过30天的地区有新疆北部、东北东部与北部、青藏高原东部，全国只有高原和高山地区的年平均降雪日数超过60天；②我国降雪主要集中在11月一次年4月，其中小雪和特大暴雪1月份最多，中雪2月份最多，大雪和暴雪3月份最多；③在51个年度里，1955—1967年度我国降雪处于少雪的负位相，1968—1994年基本为多雪的正位相。1995～2005又为少雪的负位相。
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| 关 键 词： | 降雪强度 时空分布 |
Temporal and Spatial Distribution Characters of the Snowfall with Various Intensities during 1954-2005 in China |
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| ZANG Hai-jia.Temporal and Spatial Distribution Characters of the Snowfall with Various Intensities during 1954-2005 in China[J].Journal of Anhui Agricultural Sciences,2009,37(13):6064-6066. |
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| Authors: | ZANG Hai-jia |
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| Institution: | ZANG Hai-jia(Atmospheric Department of Peking University,Beijing 100871) |
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| Abstract: | Based on the daily weather phenomena and precipitation data from 674 meteorology stations over China during 1954-2005,the time series of the small snow,medium snow,heavy snow and snowstorm of the whole China has been constructed.The study analyzed the temporal and spatial distribution characters of the snowfall with different snow intensity,the results showed that: ① the areas where the annual mean snowfall days is more than 30 days includes the north of Xinjiang,the east and the north of the northeast of China and the east of the Qinghai-Tibet Plateau.The only area having the annual mean snowfall days more than 60 days are tableland and the high mountains;② the snowfall in China mainly happens between November and next April.The times of small snow and snowstorm mainly happen in January,and the times of medium snow mainly happen in February.The times of heavy snow and snowstorm mainly happen in March.③ During 1955-1967,the snowfall days is keeping a negative phase.The phase of snowfall days was in the positive side since 1968 and the snowfall days decreased again at the middle of 1990s. |
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| Keywords: | Snowfall intensity Temporal and spatial distribution |
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