| 1961 - 2018年新疆北部冬季暴雪时空分布及其环流特征 |
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| 引用本文： | 杨霞,李阿桥,赵逸舟,魏娟娟.1961 - 2018年新疆北部冬季暴雪时空分布及其环流特征[J].冰川冻土,2020,42(3):756-765. |
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| 作者姓名： | 杨霞 李阿桥 赵逸舟 魏娟娟 |
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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.新疆维吾尔自治区气象局, 新疆 乌鲁木齐 830002 |
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| 基金项目： | 新疆维吾尔自治区气象局面上项目(MS201801);中央级公益性科研院所基本科研业务费专项资金项目(M2020007) |
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| 摘 要： | 基于1961 - 2018年冬季逐日降水资料， 研究了新疆北部不同类型暴雪的时空分布和环流特征。结果表明， 冬季新疆北部的局地暴雪日数最多（73.1%）， 区域暴雪次之（20.9%）， 大范围暴雪最少（6.0%）。总暴雪、 区域暴雪和大范围暴雪日数呈显著的增加趋势， 局地暴雪的增加趋势不显著。总暴雪、 局地暴雪和区域暴雪日数在12月最多； 大范围暴雪日数在2月最多。20世纪60 - 80年代， 新疆北部冬季以局地暴雪为主， 暴雪中心主要位于伊犁河谷和塔城地区北部； 90年代至今， 区域暴雪和大范围暴雪日数显著增加， 除伊犁河谷和塔城地区北部外， 阿勒泰地区、 天山北坡中段的暴雪日数增加显著， 乌鲁木齐成为天山北坡新的暴雪中心。新疆北部冬季暴雪的环流形势可分为3类6型， 其中锋区波动类最多， 低槽类次之， 低涡类最少。20世纪90年代前， 锋区波动类最多； 进入21世纪后， 低槽类明显增多。
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| 关 键 词： | 暴雪 类型 时空分布 环流形势 新疆北部 |
| 收稿时间： | 2019-07-26 |
| 修稿时间： | 2020-06-20 |
Spatial-temporal distribution and general circulation of snowstorm in northern Xinjiang from 1961 to 2018 |
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| Xia YANG,Aqiao LI,Yizhou ZHAO,Juanjuan WEI.Spatial-temporal distribution and general circulation of snowstorm in northern Xinjiang from 1961 to 2018[J].Journal of Glaciology and Geocryology,2020,42(3):756-765. |
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| Authors: | Xia YANG Aqiao LI Yizhou ZHAO Juanjuan WEI |
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| Institution: | 1.Xinjiang Meteorological Observatory，Urumqi 830002，China;2.Xinjiang Meteorological Information Center，Urumqi 830002，China;3.Xinjiang Meteorological Bureau，Urumqi 830002，China |
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| Abstract: | Based on the daily precipitation data of 45 meteorological stations in northern Xinjiang from 1961 to 2018， the temporal and spatial distribution and circulation characteristics of different types of snowstorms in northern Xinjiang were studied. The results show that among the three types of snowstorms in northern Xinjiang， the number of partly snowstorms was the most， followed by regional snowstorms， and the number of large regional snowstorms is the least. Partly snowstorm days accounted for 73.1% of total snowstorm days， regional snowstorm days accounted for 20.9% and large regional snowstorm days only accounted for 6.0%. Except for partly snowstorms， the days of the other two types of snowstorms increased significantly. The snowstorms in northern Xinjiang mainly occurred in November and March， and the snowstorms in January were the least. Before the 1990s， local snowstorms dominated the northern part of Xinjiang， and the snowstorm centers were mainly located in the northern part of the Ili Valley and Tacheng area. Since the 1990s， the number of days of regional and large regional snowstorms had increased significantly. The number of days of snowstorms has increased significantly in the Altay and the middle part of the northern slopes of the Tianshan Mountains. Urumqi has become a new center of snowstorms on the northern slopes of the Tianshan Mountains. The circulation situation of snowstorm in northern Xinjiang can be divided into three types and six models. Among them， the front wave type is the most， the low trough type is the second one， and the low vortex type is the last one. Before the 1990s， the front wave type was the most， and into the 21st century， the low trough type has significantly increased. |
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| Keywords: | snowstorm type spatial-temporal distribution circulation characteristics northern Xinjiang |
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