[1]余忠水,康世昌,蒋建莹,等.青藏高原夏季夜雨率空间分布及其变化特征[J].山地学报,2011,(05):627.
　YU Zhongshui,KANG Shichang,JIANG Jianyin,et al.Spatial and Temporal Variations of the NightRain Rate during Summer over the Tibetan Plateau[J].Mountain Research,2011,(05):627.
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青藏高原夏季夜雨率空间分布及其变化特征()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2011年05期
页码:
627
栏目:
山地学报
出版日期:
2011-01-01

文章信息/Info

Title:
Spatial and Temporal Variations of the NightRain Rate during Summer over the Tibetan Plateau
作者:
余忠水;康世昌;蒋建莹;
1.西藏自治区气象台,西藏 拉萨 850000；
2.中国科学院青藏高原研究所青藏高原环境变化与地表过程重点实验室,北京 100085；
3.中国科学院冰冻圈国家重点实验室,甘肃 兰州 730000；
4. 国家卫星气象中心,北京 10081
Author(s):
YU Zhongshui; KANG Shichang; JIANG Jianyin
1.Xizang Weather Observatory, Lhasa 850000,China;
2. Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, CAS, Beijing 100085,China;
3. State Key Laboratory of Cryospheric Sciences, CAS, Lanzhou 730000,China;
4. National Satellite Meteorological Center, Beijing 100081,China
关键词:
夜雨率; 时空变化; 青藏高原
Keywords:
nightrain rate;  temporal and spatial variation;  Tibetan Plateau
分类号:
P4266
文献标志码:
A
摘要:
选取了1961—2007年青藏高原海拔2 000 m以上76个气象站夏季(6—9月)逐日地面降水观测资料,分析了青藏高原夏季夜雨率的时空特征,结果表明:1.青藏高原夜雨率具有显著的区域差异性,在西藏中西部夜雨率呈"纬向型"分布,而西藏东部、川西高原至滇北夜雨率则表现为"西北-东南"走向;夜雨率高值中心出现在雅鲁藏布江中段(日喀则地区东北部至拉萨市一带),达到75%以上,同时喜马拉雅山脉南麓可能是夜雨率>70%的另一个高值区域;夜雨率最低值在青海省西北部,仅为33%;2.高原夜雨率具有明显的海拔效应,夜雨率与海拔呈显著的反相关,即海拔越高夜雨率越低,反之亦然;3.高原夜雨率随夏季日期推后呈增大趋...
Abstract:
Using daily precipitation data at the 76 meteorological stations (above 2 000 m a.s.l.) during summer (June to September) from 1961 to 2007 over the Tibetan Plateau, spatial and temporal variations of the nightrain are investigated. The results suggest that: 1There are significant regional differences for the nightrain rate in the Tibetan Plateau. a latitudetype distribution appears in central and western Tibet, and a northwestsoutheast distribution exists in the eastern Tibet, western Sichuan to northern Yunnan. Those distribution may be caused by huge terrains in the Tibetan Plateau. The highest value centers are located in the middle of the Yarlung Zangbu River basin (more than 75 %) and possibly in the southern slope of the Himalayas (70 %), while the lowest value appears in the northwest of Qinghai Province (around 33%). 2 The nightrain rate has a significant negative correlations with elevation.
3 The averaged daily nightrain rate increases with the summer date, while annual average nightrain rate show a decrease trend during last 40 years and the change point happened in the early of 1980s. 4 The nightrain rate is also related with daily precipitation. The nightrain rate is only 48.8 % when the daily precipitation is less than 1 mm, then it increases remarkably with precipitation increasing, especially when precipitation is below 20 mm. When daily precipitation is between 23 to 40 mm, nightrain rate maintains stably at 70 to 76 %, then follows by a slight decline; it reaches maximum value (75.1 %) when daily precipitation is 33 mm.

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备注/Memo

备注/Memo:
收稿日期(Received date)：2010-12-09；改回日期(Accepted) : 2011-05-11。
基金项目（Foundation item）：2009年西藏自治区重点科技应用基础研究项目(200910-11)。\[Xizang Key Basic Research of Application Project(200910-11).\]
作者简介（Biography）：余忠水,男,1971年生,高级工程师, 主要从事天气气候业务及研究等工作。\[ Yu Zhongshui, Men, Born in 1971, Senior Engineer, Engaged in weatherclimate operation and research, etc. \] E-mail: 190273340@qq.com, Tel: 18689011652
更新日期/Last Update: 1900-01-01