Study of atmospheric condition during the heavy rain event in Bojonegoro using weather research and forecasting (WRF) model: case study 9 February 2017

Indonesian Operations Research Association - International Conference on Operations Research 2017

Saragih, I.J.A.^1 ; Meygatama, A.G.^1 ; Sugihartati, F.M.^1 ; Sidauruk, M.^1 ; Mulsandi, A.^1

School of Meteorology Climatology and Geophysics (STMKG), Jakarta, Indonesia^1

关键词: Atmospheric conditions;    Cloud-top temperatures;    Convective clouds;    Heavy rains;    Himawari-8;    Meteorological parameters;    Weather research and forecasting models;    WRF-ARW;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/332/1/012025/pdf
DOI  :  10.1088/1757-899X/332/1/012025

来源: IOP

【 摘 要 】

During 2016, there are frequent heavy rains in the Bojonegoro region, one of which is rain on 9 February 2016. The occurrence of heavy rainfall can cause the floods that inundate the settlements, rice fields, roads, and public facilities. This makes it important to analyze the atmospheric conditions during the heavy rainfall events in Bojonegoro. One of the analytical methods that can be used is using WRF-Advanced Research WRF (WRF-ARW) model. This study was conducted by comparing the rain analysis from WRF-ARW model with the Himawari-8 satellite imagery. The data used are Final Analysis (FNL) data for the WRF-ARW model and infrared (IR) channel for Himawari-8 satellite imagery. The data are processed into the time-series images and then analyzed descriptively. The meteorological parameters selected to be analyzed are relative humidity, vortices, divergences, air stability index, and precipitation. These parameters are expected to indicate the existence of a convective activity in Bojonegoro during the heavy rainfall event. The Himawari-8 satellite imagery shows that there is a cluster of convective clouds in Bojonegoro during the heavy rainfall event. The lowest value of the cloud top temperature indicates that the cluster of convective clouds is a cluster of Cumulonimbus cloud (CB).