| 我国西北地区降水强度、频率和总量变化 |
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| 引用本文： | 杨晓丹,翟盘茂.我国西北地区降水强度、频率和总量变化[J].科技导报(北京),2005,23(6):24-26. |
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| 作者姓名： | 杨晓丹 翟盘茂 |
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| 作者单位： | [1]中国气象科学研究院研究生院，北京100081 [2]中国气象局国家气候中心，北京100081 |
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| 摘 要： | 利用西北地区120个测站1954-2003年逐日降水观测资料，采用REOF将我国西北地区降水变化划分为东西两部分进行研究，分析了近50年来西北地区东西部降水强度、频率和总降水量变化趋势以及它们之间的联系。结果表明：西北地区降水量的增多主要是西北西部降水量的增多引起的；西北西部年降水频率呈增加趋势，年平均降水强度也星增强趋势，而西北东部年平均降水强度增强，年降水频率却呈显著减少趋势。
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| 关 键 词： | 中国 西北地区 REOF 年降水量 降水频率 降水强度 |
| 文章编号： | 1000-7857(2005)06-0024-03 |
| 修稿时间： | 2005年4月14日 |
Changes in Precipitation Intensity, Frequency and Total in Northwest China |
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| YANG Xiao-dan,ZHAI Pan-mao.Changes in Precipitation Intensity, Frequency and Total in Northwest China[J].Science & Technology Review,2005,23(6):24-26. |
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| Authors: | YANG Xiao-dan ZHAI Pan-mao |
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| Institution: | YANG Xiao-dan1,ZHAI Pan-mao2 |
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| Abstract: | Based on daily precipitation data from 120 stations in Northwest China(NWC) between 1954 and 2003, the changes in precipitation are studied by dividing NWC into two subregions based on REOF analysis. Furthermore, changes in precipitation intensity, frequency and total are investigated. The results are as follows: increase of total precipitation in northwest China is due to precipitation increase in WNWC; both precipitation frequency and intensity have increased in WNWC, while the intensity and frequency have decreased in ENWC. |
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| Keywords: | northwest China REOF precipitation precipitation frequency mean annual precipitation intensity |
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