| 新疆伊犁河谷夏季降水日变化特征 |
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| 引用本文： | 黄秋霞,赵勇,何清.新疆伊犁河谷夏季降水日变化特征[J].冰川冻土,2015,37(2):369-375. |
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| 作者姓名： | 黄秋霞 赵勇 何清 |
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| 作者单位： | 1. 新疆昌吉回族自治州气象局, 新疆 昌吉 831100;
2. 中国气象局 乌鲁木齐沙漠气象研究所, 新疆 乌鲁木齐 830002;
3. 中国气象局 树木年轮理化研究重点开放实验室, 新疆 乌鲁木齐 830002 |
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| 基金项目： | 国家科技支撑计划项目，国家重点基础研究发展计划(973计划)项目，国家自然科学基金 |
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| 摘 要： | 基于2007-2011年伊犁河谷4个气象站逐时降水资料, 分析了伊犁河谷夏季降水日变化特征. 结果表明: 降水量最大值出现在北京时间22:00, 最小值出现在13:00, 其中, 降水量高值区主要集中在21:00至次日08:00. 一天中最易发生降水的时间为23:00至次日10:00, 03:00是降水频数最多的时刻, 16:00则发生频数最少. 降水强度最高值出现在16:00, 最低值出现在13:00. 降水主要以短持续时间的降水为主, 持续1 h的次数最多, 持续2 h的降水量最多, 对总降水量的贡献也最大, 贡献率最小的为持续14 h的降水事件. 伊犁河谷夏季的降水主要发生在夜间, 且以短时间的降水为主.
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| 关 键 词： | 伊犁河谷 夏季降水 降水日变化 降水频次 降水强度 |
| 收稿时间： | 2014-10-02 |
| 修稿时间： | 2015-02-01 |
The daily variation characteristics of summer precipitation over the Yili River Valley,Xinjiang |
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| HUANG Qiuxia,ZHAO Yong,HE Qing.The daily variation characteristics of summer precipitation over the Yili River Valley,Xinjiang[J].Journal of Glaciology and Geocryology,2015,37(2):369-375. |
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| Authors: | HUANG Qiuxia ZHAO Yong HE Qing |
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| Institution: | 1. Changji Meteorological Bureau, Changji 831100, Xinjiang, China;
2. Institute of Desert Meteorology, China Meteorological Administration, Ürümqi 830002, China;
3. Key Laboratory of Tree-ring Physical and Chemical Research of China Meteorological Administration, Ürümqi 830002, China |
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| Abstract: | Based on the hourly precipitation data from four stations over the Yili River Valley during 2007-2011, the daily variation characteristics of summer precipitation were analyzed. The results showed that the maximum precipitation appears at 22:00 Beijing Time (BT), and the minimum precipitation appears at 13:00 (BT), mainly concentrating in between 21:00 and 08:00 (BT). The maximum precipitation frequency occurs in between 23:00 and 10:00 (BT), with the maximum value at 03:00 (BT) and the minimum value at 16:00 (BT). The maximum precipitation intensity generally appears at 16:00 (BT) and the minimum one occurs at 13:00 (BT). There is short-term precipitation frequently over the Yili River Valley, mostly with the time less than one hour. The precipitation events of 2-hour have most contribution to the total precipitation, and the precipitation events of 14-hour have least contribution to the total precipitation. The summer precipitation over the Yili River Valley mostly occurs at night, with short-term precipitation events frequently. |
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| Keywords: | Yili River Valley summer precipitation daily variation of precipitation precipitation frequency precipitation intensity |
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