Preliminary result of characteristic of convective cloud development observed by x-band meteorological radar in bandung basin

International Conference On Tropical Meteorology And Atmospheric Sciences

生态环境科学;原子能学

Syaraswati, R.A.^1^3 ; Trilaksono, N.J.^2^3 ; Nugroho, G.A.^4

Undergraduate Program in Meteorology, Faculty of Earth Sciences and Technology, Institut Teknologi Bandung, Indonesia^1

Atmospheric Science Research Group, Faculty of Earth Sciences and Technology, Institut Teknologi Bandung, Indonesia^2

Weather and Climate Prediction Laboratory, Faculty of Earth Sciences and Technology, Institut Teknologi Bandung, Indonesia^3

Center for Atmospheric Science and Technology, Indonesian National Institute of Aeronautics and Space, Indonesia^4

关键词: convective;    Convective clouds;    Convective initiation;    Convective systems;    Development stages;    High temporal resolution;    Rainfall event;    Reflectivity values;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/303/1/012016/pdf
DOI  :  10.1088/1755-1315/303/1/012016

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The initial, mature, and dissipation stage changes in a convective cloud development have a short period of time so that the development stage analysis is needed by using data that has a high temporal resolution. The data that used are product CAPPI-V and CAPPI-Z from X-Band meteorological radar and also BBWS Citarum rainfall data from 13 stations that scattered in the area of Bandung basin. The selection of rainfall days is done to take the areas that have a strong convective system, and the result is that Sapan area has higher rainfall than 12 other stations on April 27th, 2017. The precipitation is caused by convective clouds. The initial stage of convective clouds begins with the existence of convergence phenomena in the afternoon and at 10 minutes before the rainfall event. It is also when there are maximum rainfall events on April 27th, 2017 which can indicate the formation of convective clouds. After the formation, the development stage occurs when there is an increase in reflectivity values on the radar and then convective cloud size starts to grow. When convective cloud size is dissipating, there is an identification of a decrease in reflectivity of the previous value in the evening. There is a new convective initiation next to the cloud that is in the dissipation stage and then joins to develops in a short time for about 30 minutes.