Sources and Dynamics of Submicron Aerosol during the Autumn Onset of the Air Pollution Season in Delhi, India,ACS Earth and Space Chemistry

当前位置： X-MOL 学术 › ACS Earth Space Chem. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Sources and Dynamics of Submicron Aerosol during the Autumn Onset of the Air Pollution Season in Delhi, India
ACS Earth and Space Chemistry ( IF 2.9 ) Pub Date : 2021-01-05 , DOI: 10.1021/acsearthspacechem.0c00340
Kanan Patel ₁ , Sahil Bhandari ₁ , Shahzad Gani _{2,

3} , Mark Joseph Campmier ₄ , Purushottam Kumar ₅ , Gazala Habib ₆ , Joshua Apte _{4,

7} , Lea Hildebrandt Ruiz ₁

Affiliation

New Delhi, India is the most polluted megacity in the world and routinely experiences high particulate matter (PM) concentrations. As part of the Delhi Aerosol Supersite Study, we have been measuring PM₁ concentration and composition in Delhi continuously since January 2017. This paper focuses on autumn, one of the most polluted seasons in Delhi when PM₁ concentrations steadily increase throughout the season and can exceed 1000 μg m^–3 during episodic events. Positive matrix factorization on the organic aerosol (OA) spectrum suggests comparable seasonal average contributions from hydrocarbon-like OA (HOA), biomass burning OA (BBOA), and oxidized OA (OOA), with BBOA dominating during episodic events. We demonstrate the influence of regional sources such as agricultural burning during this season through temporal trends of pollutants, PMF factors, meteorology, and nonparametric wind regression analysis. We use inorganic fragment ratios to show the influence of metals during the festival of Diwali. Furthermore, we demonstrate the influence of transitioning meteorology in governing PM₁ composition through the season. Overall, our analysis provides novel insights into the factors controlling PM₁ during one of the most polluted seasons in Delhi.

中文翻译：

印度德里空气污染季节秋季开始期间亚微米气溶胶的来源和动态

印度新德里是世界上污染最严重的大城市，通常会经历高颗粒物（PM）浓度。作为德里气溶胶超级站点研究的一部分，我们自2017年1月以来一直在不断测量德里的PM ₁浓度和组成。本文着眼于秋季，这是德里污染最严重的季节之一，PM _1的浓度在整个季节中稳定增加，并且可以超过1000μgm ^–3在突发事件中。有机气溶胶（OA）光谱上的正矩阵分解表明，类似烃类OA（HOA），生物质燃烧OA（BBOA）和氧化OA（OOA）的季节性贡献均相当，而BBOA在偶发事件中占主导地位。我们通过污染物，PMF因子，气象学和非参数风向回归分析的时间趋势，证明了本季节农业燃烧等区域性资源的影响。我们使用无机碎片比率来显示排灯节节日期间金属的影响。此外，我们证明了过渡气象学在整个季节控制PM ₁组成方面的影响。总体而言，我们的分析为控制PM ₁的因素提供了新颖的见解。在德里污染最严重的季节之一。

更新日期：2021-01-21

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11