Fengyun satellites explore the cloud and radiation features behind the heavy rain in southern China

27-07-2020Source:China Meteorological News Press

Since June, 2020, southern China has been exposed to consistent heavy rain. Researchers from National Satellite Meteorological Center (NSMC) have harnessed cloud phase products of Fengyun-4A meteorological satellite and OLR product of FY-3 meteorological satellite, and analyzed the frequency of mixed cloud and ice cloud in the air during the heavy rain in southern China, cloud and atmospheric radiation features like satellite OLR and the change of monitoring figures in the same historical period respectively.

Via the FY satellite, basic information on the cloud and many quantifiable microphysics parameters of the cloud can be obtained and the weather process can be monitored accurately. For instance, satellites can monitor the cloud phase. Furthermore, satellite can monitor OLR. OLR figure have a guiding role in summer convection and precipitation in lower and middle altitude. When the rain emerges, the cloud volume will be quite large. And the cloudtop radiation will be quite cold and OLR will be relatively low. 





The combined emergency frequency of mixed cloud and ice cloud from June 10 to July 10 in 2019 (a) and 2020 (b) and the difference of the figure between 2019 and 2020 (c)

OLR monthly anomaly image from June 10 to July 10, 2020

Reporter: Liu Shuqiao

Editor: Liu Shuqiao