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Quantitative effects of atmospheric diffusion on surface aerosol extinction in the Pearl River Delta region by Quan Gan; Haobo Tan; Jin Shen; Jiafeng Weng; Minghua Li; Pakwai Chan; Jun Zhao; Yingying Hong; Tingyuan Li; Chen Chen is a Environmental Science article available to read on EtoBox.
What is Quantitative effects of atmospheric diffusion on surface aerosol extinction in the Pearl River Delta region about?
Aerosol pollution is closely related to meteorological conditions. In order to accurately evaluate the effectiveness of emission reduction policies, it is very important to separate meteorological effects from emissions in long-term PM changes. In this study, we used surface extinction coefficient (SEC) of aerosol particles as an indicator to estimate the long-term trend of PM pollutant conditions, and proposed a parameter surface ventilation index (SVI) to describe the atmospheric diffusion. A novel method was introduced to quantify the effect of atmospheric diffusion and emissions on SEC from an inter-annual scale, and its applicability and limitations was discussed. The results showed that annual mean SEC exhibited an increasing trend with a rate of 15.6 Mm∙year from 2000 to 2007 and a decreasing trend with a rate of 14.4 Mm∙year from 2008 to 2018. The annual frequency distribution of SVI obeyed a lognormal distribution. The SVI value mainly concentrated between 300 and 3600 ms, SEC was negatively correlated with SVI in this range. In most cases, SEC variations were mainly dominated by emissions, and SEC variations at clean sites were more influenced by atmospheric diffusion tha
Who reads Quantitative effects of atmospheric diffusion on surface aerosol extinction in the Pearl River Delta region?
It is typically read by researchers, students, and practitioners in Environmental Science.
- Author
- Quan Gan; Haobo Tan; Jin Shen; Jiafeng Weng; Minghua Li; Pakwai Chan; Jun Zhao; Yingying Hong; Tingyuan Li; Chen Chen
- Publisher
- Elsevier Science; Elsevier ; Elsevier BV; Publons (ISSN 0048-9697)
- Published
- 2020
- Language
- EN
- Field
- Environmental Science (Physical Sciences)