Examining the physical and chemical contributions to size spectrum evolution during the development of hazes

Abstract China has experienced severe hazes with high concentrations of particulate matter in recent years. The understanding of the size spectrum evolution of submicron particulate matter is critical to making efficient remediation policies to minimize the regional and global environmental impacts...

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Autores principales:	Liyuan Zhang, Junwei Su, Yu Huang, Qiyuan Wang, Renjian Zhang, Yunfei Wu, Yue Zhang, Yan Cheng, Yuanping He, Shuncheng Lee, Chuck Yu, Zhaolin Gu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/ac634a9314d74960bbdd9cde8fffbb1b
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spelling	oai:doaj.org-article:ac634a9314d74960bbdd9cde8fffbb1b2021-12-02T17:04:08ZExamining the physical and chemical contributions to size spectrum evolution during the development of hazes10.1038/s41598-020-62296-12045-2322https://doaj.org/article/ac634a9314d74960bbdd9cde8fffbb1b2020-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-62296-1https://doaj.org/toc/2045-2322Abstract China has experienced severe hazes with high concentrations of particulate matter in recent years. The understanding of the size spectrum evolution of submicron particulate matter is critical to making efficient remediation policies to minimize the regional and global environmental impacts from hazes. During a time period of about one month, we monitored five severe haze episodes in Xi’an and four severe haze episodes in Beijing, which were characterized by two distinct kinds of aerosol mass concentration growth processes: accumulative-rise and abrupt-rise. A new method was developed to quantitatively evaluate the physical and chemical contributions to growth processes by analysing the size spectrum evolution data. The results showed that the accumulative-rise processes are governed by primary emissions and the abrupt-rise processes are governed by secondary chemical reactions. The population balance equations (PBE) were used to describe the variation of size spectrum of fine particulate matter, and the respective contributions of the physical aggregation rate and the chemical growth rate. The PBE model is solved using the adjustable direct quadrature method of moments (ADQMOM) to simulate the abrupt-rise process of haze development and to calibrate the contribution of the physical and chemical effects on the size spectrum of aerosol particles.Liyuan ZhangJunwei SuYu HuangQiyuan WangRenjian ZhangYunfei WuYue ZhangYan ChengYuanping HeShuncheng LeeChuck YuZhaolin GuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-12 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Liyuan Zhang Junwei Su Yu Huang Qiyuan Wang Renjian Zhang Yunfei Wu Yue Zhang Yan Cheng Yuanping He Shuncheng Lee Chuck Yu Zhaolin Gu Examining the physical and chemical contributions to size spectrum evolution during the development of hazes
description	Abstract China has experienced severe hazes with high concentrations of particulate matter in recent years. The understanding of the size spectrum evolution of submicron particulate matter is critical to making efficient remediation policies to minimize the regional and global environmental impacts from hazes. During a time period of about one month, we monitored five severe haze episodes in Xi’an and four severe haze episodes in Beijing, which were characterized by two distinct kinds of aerosol mass concentration growth processes: accumulative-rise and abrupt-rise. A new method was developed to quantitatively evaluate the physical and chemical contributions to growth processes by analysing the size spectrum evolution data. The results showed that the accumulative-rise processes are governed by primary emissions and the abrupt-rise processes are governed by secondary chemical reactions. The population balance equations (PBE) were used to describe the variation of size spectrum of fine particulate matter, and the respective contributions of the physical aggregation rate and the chemical growth rate. The PBE model is solved using the adjustable direct quadrature method of moments (ADQMOM) to simulate the abrupt-rise process of haze development and to calibrate the contribution of the physical and chemical effects on the size spectrum of aerosol particles.
format	article
author	Liyuan Zhang Junwei Su Yu Huang Qiyuan Wang Renjian Zhang Yunfei Wu Yue Zhang Yan Cheng Yuanping He Shuncheng Lee Chuck Yu Zhaolin Gu
author_facet	Liyuan Zhang Junwei Su Yu Huang Qiyuan Wang Renjian Zhang Yunfei Wu Yue Zhang Yan Cheng Yuanping He Shuncheng Lee Chuck Yu Zhaolin Gu
author_sort	Liyuan Zhang
title	Examining the physical and chemical contributions to size spectrum evolution during the development of hazes
title_short	Examining the physical and chemical contributions to size spectrum evolution during the development of hazes
title_full	Examining the physical and chemical contributions to size spectrum evolution during the development of hazes
title_fullStr	Examining the physical and chemical contributions to size spectrum evolution during the development of hazes
title_full_unstemmed	Examining the physical and chemical contributions to size spectrum evolution during the development of hazes
title_sort	examining the physical and chemical contributions to size spectrum evolution during the development of hazes
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/ac634a9314d74960bbdd9cde8fffbb1b
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Examining the physical and chemical contributions to size spectrum evolution during the development of hazes

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