气候变化领域集成服务门户(CCPortal): Aerosol impacts on fog microphysics over the western side of Taiwan Strait in April from 2015 to 2017

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DOI	10.1016/j.atmosenv.2021.118523
	Aerosol impacts on fog microphysics over the western side of Taiwan Strait in April from 2015 to 2017
	Tsai I.-C.; Hsieh P.-R.; Cheung H.C.; Chung-Kuang Chou C.
发表日期	2021
ISSN	1352-2310
卷号	262
英文摘要	Fog has drawn much attention from scholars and the public; it can reduce visibility to less than 1 km and affect air, sea, and land transportation and economy. In late winter and spring, fog events frequently affect intensive human activity in the coastal areas of Eastern China. In this study, numerical simulations from the Weather Research and Forecasting model were combined with observations to investigate the effects of aerosol on the microphysical properties of fog over the Taiwan Strait in April from 2015 to 2017. The mean values of observed liquid water content, number concentration of fog droplets, and mean diameter fog droplets were 0.11 g/m3, 2.2 × 108 #/m3, and 13.9 μm. The observed relationships between fog microphysical properties were close to the simulation results in the urban aerosol experiment, suggesting that the fog events at Kinmen were significantly affected by urban aerosols. The simulation results indicated that the wind blew from the south, and the air temperature was about 1°C higher than the sea surface temperature on foggy days. A stable condition accompanied by a shallow planetary boundary layer was favorable to fog formation. In the urban aerosol experiment, higher number density of aerosols resulted in more but smaller droplets and increased the LWC. An increase in aerosols reflected shortwave radiation, resulting in a colder and wetter atmosphere during fog events in the daytime. This led to a thicker fog layer and an increased number of fog droplets in the urban aerosol experiment. Foggy days and microphysical properties at Kinmen significantly differed between the studied years. As suggested by the correlations between fog-day anomalies and the corresponding Niño 3.4 index and Oceanic Niño Index, this interannual difference might be attributable to the 2015 to 2016 El Niño–Southern Oscillation (ENSO). Further observations are required to ascertain the relationship between fog events, fog microphysics, and ENSO events. © 2021 The Author(s)
关键词	aerosol Fog Fog microphysics Numerical modeling WRF
语种	英语
scopus关键词	Aerosols; Atmospheric movements; Atmospheric pressure; Boundary layers; Climatology; Drops; Fog; Oceanography; Surface waters; Weather forecasting; Coastal area; Fog events; Fog microphysic; Human activities; Microphysical property; Microphysics; Taiwan Straits; Urban aerosols; Western side; WRF; Numerical models; aerosol; air temperature; article; boundary layer; computer simulation; concentration (parameter); El Nino; forecasting; human; sea surface temperature; Taiwan; water content; weather
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248302
作者单位	Research Center for Environmental Changes, Academia Sinica, Taipei, Taiwan; School of Atmospheric Science and Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, Sun Yat-Sen University, Guangzhou, China
推荐引用方式 GB/T 7714	Tsai I.-C.,Hsieh P.-R.,Cheung H.C.,et al. Aerosol impacts on fog microphysics over the western side of Taiwan Strait in April from 2015 to 2017[J],2021,262.
APA	Tsai I.-C.,Hsieh P.-R.,Cheung H.C.,&Chung-Kuang Chou C..(2021).Aerosol impacts on fog microphysics over the western side of Taiwan Strait in April from 2015 to 2017.ATMOSPHERIC ENVIRONMENT,262.
MLA	Tsai I.-C.,et al."Aerosol impacts on fog microphysics over the western side of Taiwan Strait in April from 2015 to 2017".ATMOSPHERIC ENVIRONMENT 262(2021).