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一次层状云降雨过程多源遥感特征参量演变分析
杨文霞①1, 范皓2, 杨洋1
(1.河北省人工影响天气办公室;2.河北省邢台市气象局)
A analysis of the development of the physical quantities obtained by multi-source remote sensing in a precipitous stratiform clouds
Yang wenxia1, Fan hao2, Yang yang1
(1.Weather Modification Office of Hebei Province;2.The meteorological beareau of Xingtai)
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投稿时间:2018-03-27    修订日期:2019-07-19
中文摘要: 本文利用河北省邢台市皇寺国家观测站布设的Ka波段云雷达、微波辐射计和微雨雷达以及地面雨量计等观测资料,对2017年5月3日一次西南涡天气过程的降水云系进行了综合分析,结果表明:本次降水过程为稳定性层状云过程,云内粒子下落速度由高空向地面逐渐增大,第一轮降水出现在云的发展阶段,第二轮降水出现在云的成熟阶段,每次降水开始前云内的相对湿度、水汽含量、液态水含量和温度曲线同时出现跃增和峰值,各指标在降水结束后出现较明显下降,之后得到恢复出现第二、三次峰值,并产生降水;利用微波辐射计资料在时间和空间上连续反演计算“云中水汽压和冰面饱和水汽压差值场(“e-Ei”差值场)”,当云中过冷水和过冷水汽大值区与“e-Ei”差值场的正值区重合时,冷云中贝吉龙过程较强,有利于精细化定量判断强降水出现和人工增雨潜力区位置,综合以上遥感探测资料分析结果,可以认为本次天气过程有利的人工增雨作业时机出现两次,第一次在13:45降水刚刚开始至云顶下降到6km前;第二次时间较长,云层条件更为有利,即17:40~21:15云顶高度维持在8~10Km的时段;作业适宜高度为4~8Km(0~-20℃)。
中文关键词: 层状云  多源遥感,物理量  演变
Abstract:In this paper, a comprehensive analysis of the precipitation cloud system of southwest vortex weather on May 3, 2017 was processed based on the observational data of Ka-band cloud radar, microwave radiometer and micro rain radar in Huangsi, Xingtai, Hebei. The results showed that this precipitation process was a stable stratiform cloud process. And the falling speed of particles in the cloud gradually increased from high to low. The first precipitation appeared in the developmental stage of cloud, and the second precipitation appeared in the maturity stage of cloud. The curve of relative humidity, water vapor content, liquid water content and temperature in the cloud appeared to jump and peak at the same time before each precipitation. All indicators appeared obvious decline after the end of precipitation, then recovered and appeared the second and third peaks with precipitation. The microwave radiometer data were continuously used to retrieve "Cloud vapor pressure and ice-saturated vapor pressure difference (e-Ei)" in time and space. When the supercooled water and the large value area of supercooled water vapor in the cloud coincided with the positive area of e-Ei, the Bergeron process was relatively strong in the cold clouds. It was helpful to quantitatively determine the location of heavy precipitation and the potential area for artificial precipitation. Based on the data of cloud radar, microwave radiometer and micro rain radar, it could be considered that the weather modification opportunity appeared twice in the case. The first time was from 13:45 to the time when the cloud top dropped to 6km. The second time was longer; and the cloud condition was more favorable. That was, a period from 17:40 to 21:15 when the cloud top height was maintained at 8 to 10 km. What’s more, the suitable working height was from 4 to 8 km (0~-20 oC).
文章编号:201803270138     中图分类号:    文献标志码:
基金项目:河北省科技计划支撑项目(17227001D和14227003D),国家自然科学基金(41475121),太行山东麓人工增雨防雹作业技术试验示范(HBRYWCSY)
引用文本:
杨文霞①,范皓,杨洋,0.[en_title][J].Meteor Mon,():-.
Yang wenxia,Fan hao,Yang yang,0.A analysis of the development of the physical quantities obtained by multi-source remote sensing in a precipitous stratiform clouds[J].Meteor Mon,():-.