ANALYSIS OF THE EFFECT OF SOLAR RADIATION ON NO2 CONCENTRATION IN 2023 (CASE STUDY PASTEUR, BANDUNG)

• Main Author: Oktaviani, Phia
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/83217
• Institution: Institut Teknologi Bandung

Bandung experiences industrial development and an increase in the use of motor vehicles for daily activities each year. One of the consequences of this is air pollution with NO2 pollutants. High concentrations of NO2 in the air that exceed the Air Pollution Standard Index (ISPU) of 100, which is 200 ?g/m3 , have negative impacts on health and the environment. Meteorological aspects have a role in the process of dispersion, transformation, removal, and the inhibition or triggering pollutants in the atmosphere, one of which is solar radiation. Solar radiation plays a role in the photochemical reaction of NO2. This research will discuss the effect of differences in solar radiation intensity on NO2 concentrations during 2023 in Pasteur, Bandung using NO2 concentration data measured by Pandora instruments. In this research, solar radiation and rainfall data measured by the Automatic Weather Station (AWS) instruments with a ten-minute temporal resolution, as well as NO2 concentration data measured by Pandora instruments with a varying temporal resolution between 1.5 minutes and 10 minutes, were used. The data period ranges from December 1, 2022 to November 30, 2023. Both instruments were placed in the BRIN Building on Pasteur Street, Bandung. Subsequently, the solar radiation and rainfall data were processed to determine the grouping of solar radiation intensity into radiation and rainfall categories. Then, the solar radiation and NO2 concentration data were analyzed to understand the relationship between the two parameters based on radiation and rainfall categories using linear regression analysis and pearson correlation. The results of this research indicate that differences in solar radiation intensity has an influence on NO2 concentration, where the relationship between the two parameters is inversely proportional. When solar radiation levels are high, NO2 concentrations are low, with the most significant correlation value being for the high radiation category by -0.23. When there is a significant increase in solar radiation for the high radiation category by 558.9 W/m², NO2 concentration decreases by 3.33 x 10-7 mol/m³. Additionally, there is a lag correlation between solar radiation and NO2 of 3 hours, with the most significant lag correlation value being for the moderate radiation category by 0.921.