###
气象:2019,45(9):1278-1287
本文二维码信息
码上扫一扫!
一次层状云降雨过程多源遥感特征参量演变分析
杨文霞,范皓,杨洋,赵利伟
(河北省人工影响天气办公室,石家庄 050021; 河北省气象与生态环境重点实验室,石家庄 050021; 河北省邢台市气象局,邢台 054000)
Evolution Analysis of Physical Quantities Obtained by Multi-Source Remote Sensing in a Process of Stratiform Cloud Rainfall
YANG Wenxia,FAN Hao,YANG Yang,ZHAO Liwei
(Weather Modification Office of Hebei Province, Shijiazhuang 050021; Hebei Key Laboratory of Meteorology and Ecological Environment, Shijiazhuang 050021; Xingtai Weather Office of Hebei Province, Xingtai 054000)
摘要
图/表
参考文献
相似文献
本文已被:浏览 74次   下载 81
投稿时间:2018-03-27    修订日期:2019-07-19
中文摘要: 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-Ei”差值场),当云中过冷水和过冷水汽大值区与“e-Ei”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6 km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8~10 km的时段;作业适宜高度为4~8 km(-20~0℃)。
Abstract:In this paper, the precipitation cloud system of southwest vortex weather on 3 May 2017 was analyzed based on the observation data of Ka-band cloud radar, microwave radiometer and micro rain radar at Huangsi National Observation Station in Xingtai, Hebei Province. 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 level to low level. The precipitation first appeared in the developing stage of cloud, and then in the mature stage of cloud. The curves of relative humidity, water vapor content, liquid water content and temperature in the cloud appeared to jump and peak at the same time before raining every time. All the indicators obviously declined after the end of precipitation, then recovered and rose to 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-Ei)” in time and space. When the supercooled water and the large-value area of supercooled water vapor in the cloud coincides with the positive area of e-Ei, the Bergeron process is relatively strong in cold clouds, which is 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, we think that there were two chances for weather modification operation during the rainfall process of this time. The first chance was from 13:45 BT to the time when the cloud top dropped to 6 km, and the second was longer, and the cloud condition was more favorable for operation. That was the period from 17:40 BT to 21:15 BT when the cloud top height was maintained at the 8-10 km height. What’s more, the suitable working height was from 4 km to 8 km (-20-0℃).
文章编号:     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)、国家自然科学基金项目(41475121)和太行山东麓人工增雨防雹作业技术试验示范项目(HBRYWCSY)共同资助
引用文本:
杨文霞,范皓,杨洋,赵利伟,2019.一次层状云降雨过程多源遥感特征参量演变分析[J].气象,45(9):1278-1287.
YANG Wenxia,FAN Hao,YANG Yang,ZHAO Liwei,2019.Evolution Analysis of Physical Quantities Obtained by Multi-Source Remote Sensing in a Process of Stratiform Cloud Rainfall[J].Meteor Mon,45(9):1278-1287.