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| 祁连山积雨云的时空分布及其环流特征 | |
| 引用本文： | 陈少勇,徐科展,董安祥,夏权.祁连山积雨云的时空分布及其环流特征[J].干旱区研究,2010,27(1). |
| 作者姓名： | 陈少勇 徐科展 董安祥 夏权 |
| 作者单位： | 1. 中国气象局兰州干旱气象研究所,甘肃省干旱气候变化与减灾重点实验室,中国气象局干旱气候变化与减灾重点开放实验室,甘肃兰州,730020;白银市气象局,甘肃,白银,730900 2. 白银市气象局,甘肃,白银,730900 3. 中国气象局兰州干旱气象研究所,甘肃省干旱气候变化与减灾重点实验室,中国气象局干旱气候变化白银市气象局,甘肃,白银,730900 |
| 基金项目： | 国家自然基金委员会重点项目“西北地形云结构及降水机理研究”(40533015)资助 |
| 摘 要： | 利用祁连山区29个测站1961-2001年1～12月云状资料,分析过去41年来祁连山区积雨云的时空分布特征及与大环流变化的关系。结果表明:①受地形动力抬升作用的影响,祁连山主区积雨云出现频次高于周边地区;②柴达木盆地积雨云有显著增多趋势,其他区域积雨云有减少趋势;③祁连山积雨云的年变化大致分为4个阶段:1961-1967年为明显上升阶段,1968-1970年为急剧下降阶段,1971-1988年为缓慢上升阶段,1989-2001年为明显下降阶段;④春季积雨云频率与降水的关系密切,积雨云发生次数越多,则降水量越多;⑤祁连山积雨云偏多年与偏少年差值最大的月份是7月和5月,偏多年和偏少年在亚洲500 hPa高度场上有较大的差异;⑥与积雨云频率显著相关的环流特征量主要有:副高北界、脊线、纬向环流和极涡强度、青藏高原高度场指数;⑦用前期环流特征量为因子,建立了祁连山主区积雨云频率的预测模型。 |
| 关 键 词： | 祁连山 积雨云 时空分布 大气环流 降水 |
Analysis on Spatial Distribution of Cumulonimbus and Its Circulation Characteristics over the Qilian Mountains |
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| CHEN Shao-yong,XU Ke-zhan,DONG An-xiang,XIA Quan.Analysis on Spatial Distribution of Cumulonimbus and Its Circulation Characteristics over the Qilian Mountains[J].Arid Zone Research,2010,27(1). | |
| Authors: | CHEN Shao-yong XU Ke-zhan DONG An-xiang XIA Quan |
| Institution: | 1;2;1.Institute of Arid Meteorology;China Meteorological Administration;Key Laboratory of Arid Climate Change and Disaster Reduction of Gansu Province & Key Laboratory of Arid Climate Change and Disaster Reduction of China Meteorological Administration;Lanzhou 730020;China;2.Baiyin Meteorological Bureau;Baiyin 730900;Gansu Province;China |
| Abstract: | The cloud data observed by 29 meteorological stations in the Qilian Mountains during the period of 1961-2001 are used to analyze the spatiotemporal characteristics of cumulonimbus and the relationship between it and atmospheric circulation change in recent 41 years.The results are as follows:(1) Frequency of cumulonimbus over the main areas of the Qilian Mountains was higher than that over the peripheral regions because of the terrain power lifting effect.The highest frequency of cumulonimbus occurred in su... |
| Keywords: | Qilian Mountains cumulonimbus spatiotemporal distribution atmospheric circulation precipitation |
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