| 中国近46年来冬半年日降水变化特征分析 |
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| 引用本文： | 房巧敏,龚道溢,毛睿.中国近46年来冬半年日降水变化特征分析[J].地理科学,2007,27(5):711-717. |
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| 作者姓名： | 房巧敏 龚道溢 毛睿 |
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| 作者单位： | 北京师范大学资源学院环境演变与自然灾害教育部重点实验室 北京 100875 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)，霍英东教育基金 |
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| 摘 要： | 中国总体冬半年降水总量、日降水强度以及强降水日数都有不同程度的增加趋势。西北地区的变化相对显著,其平均降水量、降水日数及日降水强度都呈增加趋势,特别是20世纪80年代后期发生跃变。华北和中部地区降水总量趋于减少。南方3区多为增加趋势,其中东南和华南与冬季风及欧亚遥相关型有显著的负相关关系,而西南地区日降水参数则与温度和北极涛动指数显著相关。东北地区降水指标没有明显的一致趋势。
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| 关 键 词： | 冬半年 日降水 趋势 温度变化 |
| 文章编号： | 1000-0690（2007）05-0711-07 |
| 收稿时间： | 2006-03-17 |
| 修稿时间： | 2006-07-09 |
Changes of Daily Precipitation of China in Wintertime During the Last 46 Years |
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| FANG Qiao-Min,GONG Dao-Yi,MAO Rui.Changes of Daily Precipitation of China in Wintertime During the Last 46 Years[J].Scientia Geographica Sinica,2007,27(5):711-717. |
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| Authors: | FANG Qiao-Min GONG Dao-Yi MAO Rui |
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| Institution: | Laboratory of Environmental Change and Natural Disaster, Institute of Resources Science, Beijing Normal University, Beijing 100875 |
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| Abstract: | Authors analyzed the changes of daily precipitation for 164 meteorological stations in China in winter during the period 1956-2002.According to the trends of seasonal precipitation change,7 sub-regions were determined and details for each sub-region were investigated.China as a whole,the wintertime precipitation,daily precipitation intensity,and the number of extreme precipitation events showed increasing trends.Among all 7 sub-regions,Northwest China experienced relatively significant changes,with a trend of 7.03%/10a in precipitation,of 0.76 d/10a in the number of rainy days,and of 0.04 mm/(d·10 a) in precipitation intensity.Particularly a notable jump-like rise occurred in the late 1980s.In North and Middle China the precipitation amount showed decrease trends.Three southern sub-regions showed notable and same increasing trends.The relationship between daily precipitation variability and temperature was very weak in South and Southeast China,but their links to winter monsoon and Eurasia teleconnection pattern were significant.The daily precipitation variability and temperature in Southwest China showed strong connection to Arctic Oscillation.There was no consistent and notable trend in Northeast China. |
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| Keywords: | wintertime daily precipitation climate trend temperature change |
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