| 塔克拉玛干沙漠腹地沙尘天气特征 |
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| 引用本文： | 周成龙,杨兴华,钟昕洁,杨帆,仇会民.塔克拉玛干沙漠腹地沙尘天气特征[J].干旱区研究,2017,34(2):324-329. |
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| 作者姓名： | 周成龙 杨兴华 钟昕洁 杨帆 仇会民 |
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| 作者单位： | 1. 巴音郭楞蒙古自治州气象局,新疆库尔勒841000;中国气象局乌鲁木齐沙漠气象研究所,新疆乌鲁木齐830002;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. 巴音郭楞蒙古自治州气象局,新疆库尔勒,841000 |
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| 摘 要： | 利用塔克拉玛干沙漠腹地塔中气象站2007—2011年的地面(10 m)风速、风向和沙尘天气等气象要素,分析沙漠腹地的沙尘天气特征。结果表明:1塔克拉玛干沙漠腹地沙尘频率和强风频率年、月分布具有较好的一致性,沙尘天气具有明显的季节性,春、夏季占全部沙尘频次的88.3%,冬季仅占总数的2.3%。2春、夏季沙尘天气的高发时段为12:00—00:00;20:00发生频次最多,分别占春、夏季沙尘频次的12.7%和10.8%,秋季和冬季沙尘天气高发时段为14:00—21:00。3出现沙尘天气时,风向主要集中在E、ENE、N和NNE 4个方向。4沙漠腹地临界起沙风速ut5%为4~5 m·s-1,一般地表的临界起沙风速ut50%为5~6 m·s-1;5从NfDO分布来看,春、夏两季要明显高于秋冬季节,其中4月最大,为0.284。因此,沙漠腹地春、夏季易发生沙尘天气。
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| 关 键 词： | 沙尘天气 强风频率 临界起沙风速 季节变化 塔克拉玛干沙漠 |
Dust Weather in Hinterland of the Taklamakan Desert |
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| ZHOU Cheng-long,YANG Xing-hua,ZHONG Xin-jie,YANG Fan,Qiu Hui-min.Dust Weather in Hinterland of the Taklamakan Desert[J].Arid Zone Research,2017,34(2):324-329. |
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| Authors: | ZHOU Cheng-long YANG Xing-hua ZHONG Xin-jie YANG Fan Qiu Hui-min |
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| Abstract: | The meteorological data including the wind speed at 10 m height,wind direction and dust weather during the period from 2007 to 2011,observed by Tazhong Meteorological Station,were used to analyze the characteristics of dust weather and acquire the critical sand-driving wind speed in hinterland of the Taklamakan Desert.The results are as follows:① The annually and monthly frequencies of dust weather and strong wind in hinterland of the Taklamakan Desert were in a good consistency,the occurrence of dust weather was obviously seasonal,the proportion of dust weather in spring and summer accounted for 88.3％ of the total,and that in winter accounted only for 2.3％;② The time when dust weather occurred in spring and summer was mainly from 12:00 to 00:00 o'clock,and the frequency of dust weather occurred at 20:00 was the highest and accounted for 12.7％ of that in spring and 10.8％ of that in summer,and the time when dust weather occurred in autumn and winter was mainly from 14:00 to 21:00;③ The prevailing wind directions of dust weather were E,ENE,N and NNE;④ The critical sand-driving wind speed ut5％ in the hinterland varied in an range of 4-5 m · s-1,and the ur0％ was in a range of 5-6 m · s-1;⑤ The values of NfDo in spring and summer were significantly higher than those in autumn and winter,and the highest value (0.284) occurred in April.Therefore,it could be considered that it was easy to occur dust weather in spring and summer in hinterland of the Taklamakan Desert. |
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| Keywords: | dust weather frequency of strong wind critical sand-driving wind speed seasonal variation Taklimakan Desert |
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