ANALYSIS IMPACT OF ANTHROPOGENIC AEROSOL ON CLOUD GROWTH AND PRECIPITATION USING WRF-CHEM MODEL

• Main Author: Trianna, Happy
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/64141
• Institution: Institut Teknologi Bandung

One of the aerosols that we can find in our daily lives is anthropogenic aerosols. Anthropogenic means derived from human activity so that anthropogenic aerosol means aerosol derived from human activity. The population in Indonesia, especially Java, which is increasing every year will certainly increase the concentration of this anthropogenic aerosol. Changes in the level of aerosol concentration can affect the condensation nucleus for cloud formation. Another impact of the aerosol challenge is that aerosols can also affect climate and efficiency through radiation and microphysics (Hansen in Putra, 2019). One model that can model meteorological simulations related to aerosols is Research and Weather Forecasting which is coupled with a chemical code or WRF-Chem. This study aims to analyze the effect of aerosols on cloud growth and precipitation using the WRF-Chem model. The data used is NCEP FNL 0.25o x 0.25o and is available every 6 hours. The time of the study was from 1 January 00.00 West Indonesia Time to 5 January 00.00 UTC in 2018. While the aerosol data used was EDGAR-HTAP MOZART MOSAIC data. The method used is to simulate the WRF-Chem model by reporting when the aerosol conditions are OFF, ON (1x), ON (2x), and ON (3x) will then be used to compare aerosols to clouds and climate change according to those conditions. The results are anthropogenic aerosols have an impact on increasing cloud fraction and accelerate the process of cloud growth if there is enough water vapour but reduce the cloud growth on a non polluted area. Anthropogenic aerosol can increase the precipitation on a polluted area but reduce the precipitation on a non polluted area. Increasing the concentration of aerosol can increase the precipitation from microphysics scheme but not cumulus scheme.