Assessment of Surface PM2.5 Concentrations over India using Modern-Era Retrospective Analysis for Research and Applications, Version 2 (MERRA-2) Reanalysis Data

IF 1.9 4区地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS

pure and applied geophysics Pub Date : 2025-02-06 DOI:10.1007/s00024-025-03666-6

Sumit Singh, Amarendra Singh, Atul Kumar Srivastava, Virendra Pathak, Ajay Kumar, Vivek Singh

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引用次数: 0

Abstract

Particulate matters with a diameter of 2.5 μm or smaller (i.e. PM_2.5) are critical component of air pollution that has significant impacts on human health and the environment. The study underscores the utilization of the Modern-Era Retrospective Analysis for Research and Applications, Version 2 (MERRA-2) reanalysis data to evaluate surface PM_2.5 concentrations as well as its sub-species across India during the period from 2018 to 2021. MERRA-2 and ground-based AERONET-derived Aerosol Optical Depth (AOD) over Kanpur, Jaipur, Pune, and Delhi shows a significant correlation of 0.70, 0.74, 0.82 and 0.65, respectively. The study also reveals a complex relationship between PM_2.5 and its sub-species with the meteorological factors, which was found to vary seasonally, specifically, during the winter season. The Indo-Gangetic Plains (IGP) experiences pronounced seasonal variations, with peak concentrations in winter and post-monsoon seasons. This study also explores the impact of India's COVID-19 lockdown on air quality, revealing a consistent reduction in PM_2.5 and its sub-species during different lockdown phases in 2020 compared to previous and subsequent years. By leveraging high-resolution atmospheric data, this research advances our understanding of pollution patterns, sources, and trends, offering valuable insights for air quality management and policy formulation.

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使用现代研究与应用回顾性分析第2版（MERRA-2）再分析数据评估印度地表PM2.5浓度

直径小于等于2.5 μm的颗粒物（即PM2.5）是空气污染的重要组成部分，对人类健康和环境产生重大影响。该研究强调利用现代研究与应用回顾性分析第2版（MERRA-2）再分析数据来评估2018年至2021年期间印度各地的地表PM2.5浓度及其亚种。坎普尔、斋普尔、浦那和德里上空MERRA-2和地面aeronet衍生气溶胶光学深度（AOD）的相关性分别为0.70、0.74、0.82和0.65。该研究还揭示了PM2.5及其亚种与气象因素之间的复杂关系，发现其季节性变化，特别是在冬季。印度-恒河平原（IGP）经历了明显的季节变化，在冬季和季风季节后浓度达到峰值。本研究还探讨了印度COVID-19封锁对空气质量的影响，揭示了2020年不同封锁阶段PM2.5及其亚种与前几年和随后几年相比的持续减少。通过利用高分辨率大气数据，本研究促进了我们对污染模式、来源和趋势的理解，为空气质量管理和政策制定提供了有价值的见解。

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来源期刊

pure and applied geophysics 地学-地球化学与地球物理

CiteScore

4.20

自引率

5.00%

发文量

240

审稿时长

9.8 months

期刊介绍： pure and applied geophysics (pageoph), a continuation of the journal "Geofisica pura e applicata", publishes original scientific contributions in the fields of solid Earth, atmospheric and oceanic sciences. Regular and special issues feature thought-provoking reports on active areas of current research and state-of-the-art surveys. Long running journal, founded in 1939 as Geofisica pura e applicata Publishes peer-reviewed original scientific contributions and state-of-the-art surveys in solid earth and atmospheric sciences Features thought-provoking reports on active areas of current research and is a major source for publications on tsunami research Coverage extends to research topics in oceanic sciences See Instructions for Authors on the right hand side.