PM2.5 Pollution Modulates Wintertime Urban Heat Island Intensity in the Beijing-Tianjin-Hebei Megalopolis, China

doi:10.1029/2019GL084288

IEECAS OpenIR > 黄土与第四纪地质国家重点实验室（2010~）

	PM2.5 Pollution Modulates Wintertime Urban Heat Island Intensity in the Beijing-Tianjin-Hebei Megalopolis, China
	Yang, Yuanjian 1,3,4; Zheng, Zuofang 2; Yim, Steve Y. L.3,5,6; Roth, Matthias 7; Ren, Guoyu 8,9; Gao, Zhiqiu 1; Wang, Tijian 10; Li, Qingxiang 11; Shi, Chune 12; Ning, Guicai 3; Li, Yubin 1
通讯作者	Zheng, Zuofang(zfzheng@ium.cn)
	2020-01-16
发表期刊	GEOPHYSICAL RESEARCH LETTERS
ISSN	0094-8276
卷号	47 期号:1 页码:12
摘要	Heavy PM2.5 (particulate matter with aerodynamic diameter equal to or less than 2.5 mu m) pollution and urban heat island (UHI) pose increasing threats to human health and living environment in populated cities. However, how PM2.5 pollution affects the UHI intensity (UHII) has not been fully understood. The impacts of PM2.5 on the wintertime UHII in the Beijing-Tianjin-Hebei megalopolis of China are explored during 2013-2017. The results show that the UHII at the time of daily maximum/minimum temperature (UHIImax/UHIImin) exhibits a decreasing/increasing tendency as PM2.5 concentration increases, causing a continuous decrease in the diurnal temperature range. These effects are mediated via aerosol-radiation interaction (aerosol-cloud interaction) under clear-sky (cloudy) condition. The changes in PM2.5 concentration further cause different relative trends of UHII(ma)x/UHIImin/diurnal temperature range across different cities in the Beijing-Tianjin-Hebei region, which are likely related to the differences in both the PM2.5 composition and city size. This study provides insights on how air pollution affects urban climate and would help to design effective mitigation strategies. Plain Language Summary A detailed understanding of the relationship between PM2.5 (particulate matter with aerodynamic diameter equal to or less than 2.5 mu m) and the urban heat island (UHI) effect is significant for climate change adaption, planning, and sustainable development in urban regions. While the Beijing-Tianjin-Hebei (BTH) megalopolis of China is among the areas with the highest population densities and fastest urbanization rates in the world, the impacts of PM2.5 pollution on UHI, along with their regional differences in the BTH megalopolis, remain unclear. This study demonstrates that different PM2.5 concentrations in the BTH region pose various influences on the UHI intensities and their change rates in different cities of varying sizes. The UHI intensities during daytime and nighttime, respectively, exhibit weakening and strengthening tendency as PM2.5 concentration increases. These effects are mediated via aerosol-radiation interaction under clear-sky condition and aerosol-cloud interaction in cloudy weather. The relative changes in the UHI magnitudes were mainly determined by PM2.5 composition and city size. The asymmetrical influences of PM2.5 on the daytime and nighttime UHI intensities caused continuous decreases in the diurnal temperature ranges in the urban areas as the pollution level increased. Our study improves the understanding of urban climate affected by air pollution and provides a scientific basis for the mitigation of UHI impacts.
DOI	10.1029/2019GL084288
关键词[WOS]	PLANETARY BOUNDARY-LAYER ; AIR-POLLUTION ; PARTICULATE MATTER ; BLACK CARBON ; TEMPERATURE TRENDS ; HAZE POLLUTION ; IMPACT ; AEROSOL ; CLIMATE ; QUALITY
收录类别	SCI ; SCI
语种	英语
资助项目	National Key Research and Development Program of China[2018YFC1506502] ; National Natural Science Foundation of China[41575010] ; Beijing Natural Science Foundation[8202022] ; Beijing Natural Science Foundation[8171002] ; Open Funding of State Key Laboratory of Loess and Quaternary Geology[SKLLQG1842]
WOS研究方向	Geology
项目资助者	National Key Research and Development Program of China ; National Natural Science Foundation of China ; Beijing Natural Science Foundation ; Open Funding of State Key Laboratory of Loess and Quaternary Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000513983400001
出版者	AMER GEOPHYSICAL UNION
引用统计	被引频次：77[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/12828
专题	黄土与第四纪地质国家重点实验室（2010~）粉尘与环境研究室
通讯作者	Zheng, Zuofang
作者单位	1.Nanjing Univ Informat Sci & Technol, Sch Atmospher Phys, Nanjing, Peoples R China 2.China Meteorol Adm, Inst Urban Meteorol, Beijing, Peoples R China 3.Chinese Univ Hong Kong, Inst Environm Energy & Sustainabil, Hong Kong, Peoples R China 4.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian, Peoples R China 5.Chinese Univ Hong Kong, Dept Geog & Resource Management, Hong Kong, Peoples R China 6.Chinese Univ Hong Kong, Stanley Ho Big Data Decis Analyt Res Ctr, Hong Kong, Peoples R China 7.Natl Univ Singapore, Dept Geog, Singapore, Singapore 8.China Univ Geosci, Sch Environm Studies, Dept Atmospher Sci, Wuhan, Peoples R China 9.China Meteorol Adm, Lab Climate Studies, Natl Climate Ctr, Beijing, Peoples R China 10.Nanjing Univ, Sch Atmospher Sci, Nanjing, Peoples R China 11.Sun Yat Sen Univ, Sch Atmospher Sci, Guangzhou, Peoples R China 12.Anhui Inst Meteorol Sci, Key Lab Atmospher Sci & Satellite Remote Sensing, Hefei, Peoples R China
推荐引用方式 GB/T 7714	Yang, Yuanjian,Zheng, Zuofang,Yim, Steve Y. L.,et al. PM2.5 Pollution Modulates Wintertime Urban Heat Island Intensity in the Beijing-Tianjin-Hebei Megalopolis, China[J]. GEOPHYSICAL RESEARCH LETTERS,2020,47(1):12.
APA	Yang, Yuanjian.,Zheng, Zuofang.,Yim, Steve Y. L..,Roth, Matthias.,Ren, Guoyu.,...&Li, Yubin.(2020).PM2.5 Pollution Modulates Wintertime Urban Heat Island Intensity in the Beijing-Tianjin-Hebei Megalopolis, China.GEOPHYSICAL RESEARCH LETTERS,47(1),12.
MLA	Yang, Yuanjian,et al."PM2.5 Pollution Modulates Wintertime Urban Heat Island Intensity in the Beijing-Tianjin-Hebei Megalopolis, China".GEOPHYSICAL RESEARCH LETTERS 47.1(2020):12.