Toward Building a Physical Proxy for Gas-Phase Sulfuric Acid Concentration Based on Its Budget Analysis in Polluted Yangtze River Delta, East China

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Yang , L , Nie , W , Liu , Y , Xu , Z , Xiao , M , Qi , X , Li , Y , Wang , R , Zou , J , Paasonen , P , Yan , C , Xu , Z , Wang , J , Zhou , C , Yuan , J , Sun , J , Chi , X , Kerminen , V-M , Kulmala , M & Ding , A 2021 , ' Toward Building a Physical Proxy for Gas-Phase Sulfuric Acid Concentration Based on Its Budget Analysis in Polluted Yangtze River Delta, East China ' , Environmental Science & Technology , vol. 55 , no. 10 , pp. 6665-6676 . https://doi.org/10.1021/acs.est.1c00738

Title: Toward Building a Physical Proxy for Gas-Phase Sulfuric Acid Concentration Based on Its Budget Analysis in Polluted Yangtze River Delta, East China
Author: Yang, Liwen; Nie, Wei; Liu, Yuliang; Xu, Zhengning; Xiao, Mao; Qi, Ximeng; Li, Yuanyuan; Wang, Ruoxian; Zou, Jun; Paasonen, Pauli; Yan, Chao; Xu, Zheng; Wang, Jiaping; Zhou, Chen; Yuan, Jian; Sun, Jianning; Chi, Xuguang; Kerminen, Veli-Matti; Kulmala, Markku; Ding, Aijun
Contributor: University of Helsinki, Nanjing University
University of Helsinki, Institute for Atmospheric and Earth System Research (INAR)
University of Helsinki, Institute for Atmospheric and Earth System Research (INAR)
University of Helsinki, Global Atmosphere-Earth surface feedbacks
University of Helsinki, Institute for Atmospheric and Earth System Research (INAR)
Date: 2021-05-18
Language: eng
Number of pages: 12
Belongs to series: Environmental Science & Technology
ISSN: 0013-936X
URI: http://hdl.handle.net/10138/332513
Abstract: Gaseous sulfuric acid (H2SO4) is a crucial precursor for secondary aerosol formation, particularly for new particle formation (NPF) that plays an essential role in the global number budget of aerosol particles and cloud condensation nuclei. Due to technology challenges, global-wide and long-term measurements of gaseous H2SO4 are currently very challenging. Empirical proxies for H2SO4 have been derived mainly based on short-term intensive campaigns. In this work, we performed comprehensive measurements of H2SO4 and related parameters in the polluted Yangtze River Delta in East China during four seasons and developed a physical proxy based on the budget analysis of gaseous H2SO4. Besides the photo-oxidation of SO2, we found that primary emissions can contribute considerably, particularly at night. Dry deposition has the potential to be a non-negligible sink, in addition to condensation onto particle surfaces. Compared with the empirical proxies, the newly developed physical proxy demonstrates extraordinary stability in all the seasons and has the potential to be widely used to improve the understanding of global NPF fundamentally.
Subject: 114 Physical sciences
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