基于L波段探空秒数据识别河套地区云垂直结构  

Identification of Cloud Vertical Structure in Hetao Area Based on L-band Sounding Data

作　　者：于水燕 史金丽 樊茹霞 衣娜娜 Yu Shuiyan;Shi Jini;Fan Ruxia;Yi Nana(Inner Mongolia Weather Modification Center,Inner Mongolia Hohhot 010051)

机构地区：[1]内蒙古自治区人工影响天气中心,内蒙古呼和浩特010051

出　　处：《内蒙古气象》2023年第6期36-43,共8页Meteorology Journal of Inner Mongolia

基　　金：内蒙古气象局研究型业务项目(nmqxyj201910);内蒙古气象局科技创新项目(nmqxkjcx202205);中国气象局云降水物理与人工影响天气重点开放实验室开放课题(2020Z00705)共同资助。

摘　　要：基于L波段探空秒数据反演云的垂直结构,统计分析2019年内蒙古河套地区的云垂直结构及其与不同强度降水的关系。得到结论如下:(1)河套地区有云日>256 d,以1~2层云为主,云层最多时有5层。1层云时,临河地区、乌拉特中旗的云较薄,东胜地区、呼和浩特地区的云较厚。2层云时,乌拉特中旗、东胜地区及呼和浩特地区的下层云厚,上层云薄;临河地区相反。3层云时,乌拉特中旗、东胜地区及呼和浩特地区的中间云层较厚,上、下层云较薄;临河地区则是最上层云较厚。(2)当降水云为1层云时,东胜地区的云最厚,乌拉特中旗的云最薄。当降水云为2层云时,呼和浩特及东胜地区的云呈现下层厚、上层薄的特征,临河及乌拉特中旗的云呈现上下两层云厚度相差不大的特征。(3)弱降水时,云为1~3层,云厚的变化对降水影响不大。一般降水时,6 h累积降水量与云层分布有较好的对应关系,总云厚大,降水偏多。(4)总云厚及6 h累积降水量有明显的季节变化。春冬季的云偏薄,降水较弱;夏秋季的云偏厚,降水较强。6—9月是主要的降水期,在水资源开发利用时要把握好此阶段。Based on the L-band sounding second data,the vertical structure of clouds and its relationship with precipitation intensity in Hetao area in 2019 were statistically analyzed.The conclusions were as follows:(1)The cloudy days in Hetao area were more than 256 days,which were mainly 1-2 layers clouds.There were 5 layers of the maximum cloud layers.When the cloud layer was 1,the clouds in Linhe and Urad Middle Banner were thinner,and the clouds in Dongsheng and Hohhot were thicker.When there were 2 layers of clouds,the lower layer of clouds in Urad Middle Banner,Dongsheng and Hohhot was thick,and the upper layer was thin.The clouds in Linhe were the opposite.When there were 3 layers of clouds,the middle layer of clouds in Urad Middle Banner,Dongsheng and Hohhot was thicker,and the upper and lower layers were thinner.The upper layer of clouds was thicker in Linhe.(2)When the precipitation cloud layer was 1,the clouds in Dongsheng area were the thickest,and the clouds in Urad Middle Banner were the thinnest.When there were two layers of precipitation clouds,the clouds in Hohhot and Dongsheng area were thick in the lower layer and thin in the upper layer,but there were not much difference in cloud thickness between the lower and upper layers in Linhe and Urad Middle Banner.(3)When the precipitation was weak,the layers of clouds usually were 1-3,and the variation of cloud thickness had little effect on the precipitation.In general precipitation,there was a close correspondence between the cumulative precipitation in 6 hours and the cloud distribution,the total cloud thickness was large,and the precipitation was more.(4)There were obvious seasonal variations in total cloud thickness and 6-hour cumulative precipitation.In spring and winter,the clouds were thin and the precipitation was weak.In summer and autumn,the clouds were thicker and the precipitation was stronger.The main precipitation period was from June to September,and it is necessary to take advantage of this stage to develop and utilize water resources in the a

关 键 词：云垂直结构 L波段探空 河套地区 季节变化 

分 类 号：P426.5[天文地球—大气科学及气象学] P412.25