The Effect of the COVID-19 Pandemic on Nitrogen Dioxide (NO2) Gas Concentration in Yogyakarta Special Province

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Abstract
COVID-19 has plagued the world, one of which is Indonesia. During the COVID-19 pandemic, all anthropogenic activities are limited, including activities that cause air pollution, such as transportation and industrial activities. Nitrogen Dioxide (NO 2 ) is one of the parameters of air pollution which has the main source of human activity. Therefore, this study aims to analyze the effect of the COVID-19 pandemic on changes in NO 2 gas concentrations in the Yogyakarta Special Province. This study uses Sentinel 5-P satellite imagery data obtained through cloud computing on Google Earth Engine (GEE) to obtain NO 2 gas concentration values. The results showed that there was a 3.7 % decrease in the concentration of NO 2 gas before and after the COVID-19 pandemic. The correlation result between the number of COVID-19 cases and the concentration of NO 2 gas is 0.39, which means it has a weak correlation.