气候变化领域集成服务门户(CCPortal): Impact of various air mass types on cloud condensation nuclei concentrations along coastal southeast Florida

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DOI	10.1016/j.atmosenv.2021.118371
	Impact of various air mass types on cloud condensation nuclei concentrations along coastal southeast Florida
	Edwards E.-L.; Corral A.F.; Dadashazar H.; Barkley A.E.; Gaston C.J.; Zuidema P.; Sorooshian A.
发表日期	2021
ISSN	1352-2310
卷号	254
英文摘要	Coastal southeast Florida experiences a wide range of aerosol conditions, including African dust, biomass burning (BB) aerosols, as well as sea salt and other locally-emitted aerosols. These aerosols are important sources of cloud condensation nuclei (CCN), which play an essential role in governing cloud radiative properties. As marine environments dominate the surface of Earth, CCN characteristics in coastal southeast Florida have broad implications for other regions with the added feature that this site is perturbed by both natural and anthropogenic emissions. This study investigates the influence of different air mass types on CCN concentrations at 0.2% (CCN0.2%) and 1.0% (CCN1.0%) supersaturation (SS) based on ground site measurements during selected months in 2013, 2017, and 2018. Average CCN0.2% and CCN1.0% concentrations were 373 ± 200 cm−3 and 584 ± 323 cm−3, respectively, for four selected days with minimal presence of African dust and BB (i.e., background days). CCN concentrations were not elevated on the four days with highest influence of African dust (289 ± 104 cm−3 [0.2% SS] and 591 ± 302 cm−3 [1.0% SS]), consistent with high dust mass concentrations comprised of coarse particles that are few in number. In contrast, CCN concentrations were substantially enhanced on the five days with the greatest impact from BB (1408 ± 976 cm−3 [0.2% SS] and 3337 ± 1252 cm−3 [1.0% SS]). Ratios of CCN0.2%:CCN1.0% were used to compare the hygroscopicity of the aerosols associated with African dust, BB, and background days. Average ratios were similar for days impacted by African dust and BB (0.54 ± 0.17 and 0.55 ± 0.17, respectively). A 29% higher average ratio was observed on background days (0.71 ± 0.14), owing in part to a strong presence of sea salt and reduced presence of more hydrophobic species such as those of a carbonaceous or mineral-dust nature. Finally, periods of heavy rainfall were shown to effectively decrease both CCN0.2% and CCN1.0% concentrations. However, the rate varied at which such concentrations increased after the rain. This work contributes knowledge on the nucleating ability of African dust and BB in a marine environment after varying periods of atmospheric transport (days to weeks). The results can be used to understand the hygroscopicity of these air mass types, predict how they may influence cloud properties, and provide a valuable model constraint when predicting CCN concentrations in comparable situations. © 2021 Elsevier Ltd
关键词	ACTIVATE Aerosol-cloud interactions African dust CCN EVS-3 Smoke
语种	英语
scopus关键词	Aerosols; Condensation; Dust; ACTIVATE; Aerosol-cloud interaction; African dust; Air mass; Biomass-burning; Cloud condensation nuclei; EVS-3; Florida; Marine environment; Sea salts; Smoke; carbon; aerosol; air mass; anthropogenic source; atmospheric transport; biomass burning; cloud condensation nucleus; hygroscopicity; marine environment; sea salt; aerosol; air pollution; Article; atmospheric deposition; atmospheric transport; autumn; biomass; climate; cloud; cloud condensation nuclei; concentration (parameter); controlled study; depolarization; dust; Florida; marine environment; meteorology; mineral dust; molecular weight; particulate matter 10; particulate matter 2.5; precipitation; priority journal; seashore; seasonal variation; smoke; summer; wet deposition; wettability; Florida [United States]; United States; Florida
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/248445
作者单位	Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ, United States; Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL, United States; Department of Hydrology and Atmospheric Sciences, University of Arizona, Tucson, AZ, United States
推荐引用方式 GB/T 7714	Edwards E.-L.,Corral A.F.,Dadashazar H.,et al. Impact of various air mass types on cloud condensation nuclei concentrations along coastal southeast Florida[J],2021,254.
APA	Edwards E.-L..,Corral A.F..,Dadashazar H..,Barkley A.E..,Gaston C.J..,...&Sorooshian A..(2021).Impact of various air mass types on cloud condensation nuclei concentrations along coastal southeast Florida.ATMOSPHERIC ENVIRONMENT,254.
MLA	Edwards E.-L.,et al."Impact of various air mass types on cloud condensation nuclei concentrations along coastal southeast Florida".ATMOSPHERIC ENVIRONMENT 254(2021).