| 1955—2007年拉萨市雨季夜雨率变化特征 |
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| 引用本文： | 余忠水. 1955—2007年拉萨市雨季夜雨率变化特征[J]. 气象, 2011, 37(12): 1584-1588 |
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| 作者姓名： | 余忠水 |
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| 作者单位： | 西藏自治区气象台,拉萨,850000 |
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| 基金项目： | 公益性行业（气象）科研项目（编号: GYHY201006040）资助 |
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| 摘 要： | 利用1955—2007年拉萨市逐日降水和气温地面观测资料,分析了拉萨市雨季（5—9月）夜雨率变化特征。结果表明：拉萨市整个雨季日夜雨率变化是比较稳定的,近50多年来基本没有发生明显的年代际变化。夜雨率与日降水量有显著关联,当日降水量在25 mm以下时,夜雨率随降水量增加而增大,当日降水量〈1 mm时夜雨率最小为75.2%,当日降水量为25 mm时,夜雨率达到最大值93.4%;夜雨率与日温差存在显著的负相关;拉萨多夜雨与地形有关,高夜雨率既有有利的一面,也会带来一些负面影响。因此,深入探讨夜雨率是制定有效防御气象灾害对策的重要依据。
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| 关 键 词： | 拉萨市 夜雨率 变化特征 雨季 降水量 |
| 收稿时间： | 2011-01-10 |
| 修稿时间： | 2011-10-01 |
The Night Rain Rate Variations of Lhasa in Rainy Season During 1955-2007 |
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| Yu Zhongshui. The Night Rain Rate Variations of Lhasa in Rainy Season During 1955-2007[J]. Meteorological Monthly, 2011, 37(12): 1584-1588 |
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| Authors: | Yu Zhongshui |
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| Affiliation: | Xizang Meteorological Observatory, Lhasa 850000 |
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| Abstract: | Using daily precipitation and air temperature data of Lhasa to analyze the night-rain rate in rainy season(May-September) during years 1955-2007,the results could be summarized as follows:The variations of night-rain rate was comparatively stable in whole rainy season,without obvious inter-decadal changes during the past 50 years.The night-rain rate was significantly associated with daily precipitation, and the night-rain rate increased with the enhancement of precipitation when rainfall was below 25 mm,it ... |
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| Keywords: | Lhasa night-rain rate variation characteristics rainy season rainfall |
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