Comparative Analysis of NO2, SO2, CO, HCHO, and Aerosol Concentrations in Shanghai and Dubai Using Satellite Imagery from NASA's Giovanni and Sentinel-5P within Google Earth Engine

Subject Areas : Environment

Sadegh Mokhtarisabet ¹ , Mohammad Morovati ²

1 - Islamic Azad University, Yazd, Iran
2 - Department of GIS,, Lenjan Branch, Islamic Azad University, Iran

Received: 2022-02-01 Accepted : 2022-09-15 Published : 2024-05-30

Keywords: Sentinel 5-P, Air Pollution Google Earth Engine, Comparative Analysis, NO2 and SO2 Concentrations ,

Abstract :

Background and objective: Air pollution is a critical environmental issue, particularly in urban areas. This study investigates the concentrations of nitrogen dioxide (NO₂), sulfur dioxide (SO₂), carbon monoxide (CO), formaldehyde (HCHO), and aerosols in Shanghai and Dubai from 2012 to 2021. The primary objective is to analyze the spatial and temporal variations in these pollutants, utilizing satellite data from Sentinel-5P and NASA's Giovanni. Materials and methods: Using Google Earth Engine (GEE), we employed a robust methodological framework that integrated satellite imagery analysis with statistical modeling to assess the variations in air quality. Data was collected for both cities, focusing on seasonal patterns and pollution sources. Comparative analyses were conducted to understand the relationship between pollution levels and environmental factors. Results and conclusion: The results revealed that Shanghai consistently exhibited higher concentrations of pollutants compared to Dubai, correlating with its extensive industrial activities. Seasonal variations were significant, with increased levels during specific months. In contrast, Dubai's air quality was more stable, although a recent rise in SO₂ levels poses concerns. The findings underscore the necessity for tailored air quality management strategies in both cities, emphasizing the importance of ongoing monitoring, regulatory frameworks, and public awareness to mitigate pollution effectively.

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