Пространственно-временная динамика концентраций диоксида азота в атмосфере Северо-Восточного Вьетнама

Trung H.  Nguyen; Semyon A.  Kurolap; Yuriy A.  Nesterov

doi:10.52575/2712-7443-2025-49-2-350-362

Authors

Trung H. Nguyen Voronezh State University
Semyon A. Kurolap Voronezh State University
Yuriy A. Nesterov Voronezh State University

DOI:

https://doi.org/10.52575/2712-7443-2025-49-2-350-362

Keywords:

Northeast Vietnam, Google Earth Engine, Sentinel-5P TROPOMI, nitrogen dioxide, spatiotemporal analysis

Abstract

The aim of the study is to analyze the spatiotemporal dynamics of nitrogen dioxide (NO₂) concentration in the atmosphere of Northeast Vietnam from 2019 to 2024. The study focuses on identifying patterns of air pollution in this area and determining pollution sources to develop recommendations for air quality management and improving resilience to environmental risks. For the analysis, remote sensing (RS) data and geographic information system (GIS) technologies were used. The methodology involved processing NO₂ concentration data in the Google Earth Engine environment, which allowed the identification of major trends and periodic fluctuations in pollutant concentration. A series of maps was created using QGIS for the spatiotemporal analysis of NO₂ concentration dynamics. The results of the study showed that the NO₂ concentration in the atmosphere was highest in areas located at the intersections of the provinces of Quảng Ninh, Hải Phòng, Hải Dương, and Bắc Ninh, Bắc Giang. These regions are centers of economic and industrial activity, characterized by intensive transportation and a high concentration of large industrial enterprises. The observed sharp decrease in nitrogen dioxide levels during 2020 closely correlates with the period of the global crisis caused by the COVID-19 pandemic. At that time, many countries, including Vietnam, implemented measures to restrict industrial processes and regulate vehicular traffic. The analysis of the collected data suggests a direct relationship between NO₂ concentrations in the air masses of northeastern Vietnam and the degree of industrial infrastructure development, as well as the density of traffic flows in specific areas. This scientific investigation highlights the necessity of establishing cooperative mechanisms between administrative units to enable effective atmospheric monitoring, implement air quality management systems, and develop strategies to reduce anthropogenic impacts.

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Author Biographies

Trung H. Nguyen, Voronezh State University

Postgraduate student at the Department of Geoecology and Environmental Monitoring of the Faculty of Geography, Geoecology and Tourism, Voronezh State University, Voronezh, Russia

E-mail: hieugeo@mail.ru

Semyon A. Kurolap, Voronezh State University

Doctor of Geographical Sciences, Professor, Dean of the Faculty of Geography, Geoecology and Tourism, Voronezh State University, Voronezh, Russia

E-mail: skurolap@mail.ru

Yuriy A. Nesterov, Voronezh State University

Candidate of Geographical Sciences, Associate Professor at the Department of Geoecology and Environmental Monitoring of the Faculty of Geography, Geoecology and Tourism, Voronezh State University, Voronezh, Russia

E-mail: nland58@mail.ru

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