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Anthropogenic aerosols prolong fog lifetime in China

Quan, Jiannong and Liu, Yangang and Jia, Xingcan and Liu, Lin and Dou, Youjun and Xin, Jinyuan and Seinfeld, John H. (2021) Anthropogenic aerosols prolong fog lifetime in China. Environmental Research Letters, 16 (4). Art. No. 044048. ISSN 1748-9326. https://resolver.caltech.edu/CaltechAUTHORS:20210429-144554249

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Abstract

Investigation of aerosol effects on fog with long-term measurements has generally focused on fog occurrence frequency and intensity; here we examine the effects on fog lifetime, fog formation, and fog dissipation. From analysis of 52 years (1960–2011) of data collected at 404 stations in China, it is found that fog lifetime exhibits a clear increasing trend with time, and the increased lifetime is mainly attributable to delayed fog dissipation. Increased aerosol levels and global warming affect fog lifetime in opposite ways; increased aerosol levels serve to prolong fog lifetime by primarily delaying fog dissipation, whereas warming decreases fog lifetime by primarily delaying fog formation. The overall aerosol effect on fog lifetime in China is shown to predominate, especially in the highly polluted region of Eastern China. The observational findings are confirmed by a suite of WRF-Chem simulations that reveal the influences of both increased aerosol levels and temperatures through a complex chain of interactions among microphysical, dynamical, thermodynamic, and radiative processes.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1088/1748-9326/abef32DOIArticle
https://data.cma.cn/enRelated ItemData
ORCID:
AuthorORCID
Xin, Jinyuan0000-0003-4243-5072
Seinfeld, John H.0000-0003-1344-4068
Additional Information:© 2021 The Author(s). Published by IOP Publishing Ltd. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Received 8 October 2020. Revised 11 March 2021. Accepted for publication 16 March 2021. Published 1 April 2021. This research is supported by National Natural Science Foundation of China (41975181), and Chinese Key Projects in the National Science and Technology (2017YFC0209604, 2018YFF0300101). Y.L. is supported by the US Department of Energy Atmospheric System Research (ASR) Program. The data were obtained from National Meteorological Information Center of China Meteorological Administration (https://data.cma.cn/en), which is open to the scientific community. Data availability statement. The data that support the findings of this study are openly available at the following URL/DOI: https://data.cma.cn/en. The authors declare no competing financial interests.
Funders:
Funding AgencyGrant Number
National Natural Science Foundation of China41975181
Chinese Key Projects in the National Science and Technology2017YFC0209604
Chinese Key Projects in the National Science and Technology2018YFF0300101
Department of Energy (DOE)UNSPECIFIED
Subject Keywords:fog lifetime, aerosol, global warming, process interactions
Issue or Number:4
Record Number:CaltechAUTHORS:20210429-144554249
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20210429-144554249
Official Citation:Jiannong Quan et al 2021 Environ. Res. Lett. 16 044048
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:108889
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:29 Apr 2021 22:49
Last Modified:29 Apr 2021 22:49

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