气候变化领域集成服务门户(CCPortal): African smoke particles act as cloud condensation nuclei in the wintertime tropical North Atlantic boundary layer over Barbados

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DOI	10.5194/acp-23-981-2023
	African smoke particles act as cloud condensation nuclei in the wintertime tropical North Atlantic boundary layer over Barbados
	Royer, Haley M.; Poehlker, Mira L.; Krueger, Ovid; Blades, Edmund; Sealy, Peter; Lata, Nurun Nahar; Cheng, Zezhen; China, Swarup; Ault, Andrew P.; Quinn, Patricia K.; Zuidema, Paquita; Poehlker, Christopher; Poeschl, Ulrich; Andreae, Meinrat; Gaston, Cassandra J.
发表日期	2023
ISSN	1680-7316
EISSN	1680-7324
起始页码	981
结束页码	998
卷号	23 期号:2 页码:18
英文摘要	The number concentration and properties of aerosol particles serving as cloud condensation nuclei (CCN) are important for understanding cloud properties, including in the tropical Atlantic marine boundary layer (MBL), where marine cumulus clouds reflect incoming solar radiation and obscure the low-albedo ocean surface. Studies linking aerosol source, composition, and water uptake properties in this region have been conducted primarily during the summertime dust transport season, despite the region receiving a variety of aerosol particle types throughout the year. In this study, we compare size-resolved aerosol chemical composition data to the hygroscopicity parameter kappa derived from size-resolved CCN measurements made during the Elucidating the Role of Clouds-Circulation Coupling in Climate (EUREC4A) and Atlantic Tradewind Ocean-Atmosphere Mesoscale Interaction Campaign (ATOMIC) campaigns from January to February 2020. We observed unexpected periods of wintertime long-range transport of African smoke and dust to Barbados. During these periods, the accumulation-mode aerosol particle and CCN number concentrations as well as the proportions of dust and smoke particles increased, whereas the average kappa slightly decreased (kappa=0.46 +/- 0.10) from marine background conditions (kappa=0.52 +/- 0.09) when the submicron particles were mostly composed of marine organics and sulfate. Size-resolved chemical analysis shows that smoke particles were the major contributor to the accumulation mode during long-range transport events, indicating that smoke is mainly responsible for the observed increase in CCN number concentrations. Earlier studies conducted at Barbados have mostly focused on the role of dust on CCN, but our results show that aerosol hygroscopicity and CCN number concentrations during wintertime long-range transport events over the tropical North Atlantic are also affected by African smoke. Our findings highlight the importance of African smoke for atmospheric processes and cloud formation over the Caribbean.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000918795700001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273382
作者单位	University of Miami; Max Planck Society; Leipzig University; Leibniz Institut fur Tropospharenforschung (TROPOS); United States Department of Energy (DOE); Pacific Northwest National Laboratory; University of Michigan System; University of Michigan; National Oceanic Atmospheric Admin (NOAA) - USA; King Saud University; University of California System; University of California San Diego; Scripps Institution of Oceanography
推荐引用方式 GB/T 7714	Royer, Haley M.,Poehlker, Mira L.,Krueger, Ovid,et al. African smoke particles act as cloud condensation nuclei in the wintertime tropical North Atlantic boundary layer over Barbados[J],2023,23(2):18.
APA	Royer, Haley M..,Poehlker, Mira L..,Krueger, Ovid.,Blades, Edmund.,Sealy, Peter.,...&Gaston, Cassandra J..(2023).African smoke particles act as cloud condensation nuclei in the wintertime tropical North Atlantic boundary layer over Barbados.ATMOSPHERIC CHEMISTRY AND PHYSICS,23(2),18.
MLA	Royer, Haley M.,et al."African smoke particles act as cloud condensation nuclei in the wintertime tropical North Atlantic boundary layer over Barbados".ATMOSPHERIC CHEMISTRY AND PHYSICS 23.2(2023):18.