| 2012 - 2017年伊犁河谷冬季降水日变化特征 |
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| 引用本文： | 杨霞,安大维,周鸿奎,赵逸舟.2012 - 2017年伊犁河谷冬季降水日变化特征[J].冰川冻土,2020,42(2):609-619. |
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| 作者姓名： | 杨霞 安大维 周鸿奎 赵逸舟 |
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| 作者单位： | 1.新疆维吾尔自治区气象台, 新疆 乌鲁木齐 830002;2.新疆维吾尔自治区气象信息中心, 新疆 乌鲁木齐 830002;3.乌鲁木齐市气象局, 新疆 乌鲁木齐 830002 |
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| 基金项目： | 国家重点研发计划重点专项“中亚极端降水系统精细化结构”(2018YFC1507103);新疆维吾尔自治区气象局面上项目(MS201801) |
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| 摘 要： | 利用2012 - 2017年冬季伊犁河谷10个国家气象站逐小时降水资料， 分析了伊犁河谷不同区域降水日变化特征， 结果表明： 冬季伊犁河谷西部和中部地区降水量日变化呈单峰型， 北京时间09：00 - 12：00是主要的峰值时段； 其他地区降水量日变化单峰特征不显著。伊犁河谷大部分地区降水量与降水频次的关系比降水量与降水强度的关系更为密切。伊犁河谷冬季降水事件以6 h以内的短历时降水为主， 但其对冬季总降水量的贡献率不足30%； 持续12 h以上的长持续性降水事件发生次数虽少， 但它是伊犁河谷冬季总降水量的主要贡献者。短历时和持续性降水事件是伊犁河谷西部地区降水量日变化主峰的重要贡献者； 持续性和长持续性降水事件是伊犁河谷中部及北部地区降水量日变化峰值的重要贡献者； 伊犁河谷西南部地区冬季降水日循环与降水持续性之间的关系不显著。
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| 关 键 词： | 冬季降水 小时降水 日变化 伊犁河谷 |
| 收稿时间： | 2019-04-07 |
| 修稿时间： | 2020-02-15 |
Daily variation of winter precipitation in Ili River valley of Xinjiang from 2012 to 2017 |
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| Xia YANG,Dawei AN,Hongkui ZHOU,Yizhou ZHAO.Daily variation of winter precipitation in Ili River valley of Xinjiang from 2012 to 2017[J].Journal of Glaciology and Geocryology,2020,42(2):609-619. |
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| Authors: | Xia YANG Dawei AN Hongkui ZHOU Yizhou ZHAO |
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| Institution: | 1.Xinjiang Meteorological Observatory，Urumqi 830002，China;2.Xinjiang Meteorological Information Center，Urumqi 830002，China;3.Urumqi Meteorological Bureau，Urumqi 830002，China |
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| Abstract: | Based on the hourly precipitation data from ten stations over Ili River valley during 2012 - 2017， the daily variations of winter precipitation were analyzed. The results showed that the diurnal variation of the winter precipitation in the west valley presented nearly a single peak and a single trough， with the maximum at morning （09：00 - 12：00， Beijing time）. The daily variation of winter precipitation in other areas of the valley presented multiple peaks with more dispersed small peaks. The occurrence time of maximum average precipitation intensity and maximum hourly accumulative precipitation was more consistent with maximum hourly accumulative precipitation frequency. The relationship between precipitation and precipitation frequency in most areas of the valley was closer. The winter precipitation in the valley was mainly short-duration precipitation within 6 hours， and its contribution rate to the total winter precipitation was less than 30%. There were less precipitation events lasting longer than 12 hours， less than 30% in most parts of the valley， but their contributed more to the valley. Short duration and continuous precipitation events were important contributors to the diurnal variation of precipitation in the western part of the valley. Continuous and long precipitation events were important contributors to the diurnal variation peaks of precipitation in the center and north of the valley. The relationship between the daily cycle of winter precipitation and precipitation continuity was not significant in the southwest of the valley. |
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| Keywords: | winter precipitation hourly precipitation diurnal variations Ili River valley |
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