Impacts of organic aerosols and its oxidation level on CCN activity from measurement at a suburban site in China

doi:10.5194/acp-16-5413-2016

	Impacts of organic aerosols and its oxidation level on CCN activity from measurement at a suburban site in China
	Zhang, Fang 1; Li, Zhanqing 1,2,3; Li, Yanan1 ; Sun, Yele 4; Wang, Zhenzhu5 ; Li, Ping 1; Sun, Li 6; Wang, Pucai 7; Cribb, Maureen 2,3; Zhao, Chuanfeng 1; Fan, Tianyi 1; Yang, Xin 1; Wang, Qingqing 4
	2016
发表期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
摘要	This study is concerned with the impacts of organic aerosols on cloud condensation nuclei (CCN) activity based on field measurements made at a suburban site in Northern China. The sensitivity of the estimated CCN number concentration (N-CCN) to both volume fraction of organic material (x(org)) and aerosol oxidation level (using f(44), the fraction of ma center dot zaEuro-44 in aerosol organic material) are examined. A strong dependence of CCN number concentration (N-CCN) on the x(org) and f(44) was noted. The sensitivity of N-CCN to volume fraction of organics increased with increasing x(org). The impacts of the aerosol particles oxidization or aging level on estimating N-CCN were also very significant. When the particles were mostly composed of organics (x(org)aEuro-> aEuro-60aEuro-%), the N-CCN at the supersaturation of 0.075 and 0.13aEuro-% was underestimated by 46 and 44aEuro-%, respectively, if aerosol particles were freshly emitted with primary organics (f(44)aEuro-< aEuro-11aEuro-%); the underestimation decreased to 32 and 23aEuro-% at the corresponding supersaturations, however, if the particles were with more hygroscopic secondary organics (f(44)aEuro-> aEuro-15aEuro-%). The N-CCN at the supersaturation of 0.76aEuro-% was underestimated by 11 and 4aEuro-%, respectively, at f(44)aEuro-< aEuro-11 and f(44)aEuro-> aEuro-15aEuro-%. However, for the particles composed of low organics (e.g., x(org)aEuro-< aEuro-40aEuro-%), the effect caused by the f(44) was quite insignificant both at high and low supersaturations. This is because the overall hygroscopicity of the particles is dominated by inorganics such as sulfate and nitrate, which are more hygroscopic than organic compounds. Our results indicated that it would decrease the uncertainties in estimating N-CCN and lead to a more accurate estimation of N-CCN to increase the proportion of secondary organics, especially when the composition of the aerosols is dominated by organics. The applicability of the CCN activation spectrum obtained at Xinzhou to the Xianghe site, about 400aEuro-km to the northeast of Xinzhou, was investigated, with the aim of further examining the sensitivity of N-CCN to aerosol type. Overall, the mean CCN efficiency spectrum derived from Xinzhou performs well at Xianghe when the supersaturation levels are > aEuro-0.2aEuro-% (overestimation of 2-4aEuro-%). However, N-CCN was overestimated by aEuro-20aEuro-% at supersaturation levels of < aEuro-0.1aEuro-%. This suggests that the overestimation is mainly due to the smaller proportion of aged and oxidized organic aerosols present at Xianghe compared to Xinzhou.
文章类型	Article
WOS标题词	Science & Technology ; Physical Sciences
DOI	10.5194/acp-16-5413-2016
关键词[WOS]	CLOUD CONDENSATION NUCLEI ; CHEMICAL SPECIATION MONITOR ; DROPLET ACTIVATION ; SIZE DISTRIBUTIONS ; PARTICLE FORMATION ; HYGROSCOPIC PROPERTIES ; AMBIENT AEROSOL ; GROWTH ; AIR ; COUNTER
收录类别	SCI
语种	英语
项目资助者	National Basic Research Program of China "973"(2013CB955801 ; National Basic Research Program of China "973"(2013CB955801 ; National Basic Research Program of China "973"(2013CB955801 ; National Basic Research Program of China "973"(2013CB955801 ; National Basic Research Program of China "973"(2013CB955801 ; National Basic Research Program of China "973"(2013CB955801 ; National Basic Research Program of China "973"(2013CB955801 ; National Basic Research Program of China "973"(2013CB955801 ; National Basic Research Program of China "973"(2013CB955801 ; National Basic Research Program of China "973"(2013CB955801 ; National Basic Research Program of China "973"(2013CB955801 ; National Basic Research Program of China "973"(2013CB955801 ; National Basic Research Program of China "973"(2013CB955801 ; National Basic Research Program of China "973"(2013CB955801 ; National Basic Research Program of China "973"(2013CB955801 ; National Basic Research Program of China "973"(2013CB955801 ; NSF (China)(4141101031 ; NSF (China)(4141101031 ; NSF (China)(4141101031 ; NSF (China)(4141101031 ; NSF (China)(4141101031 ; NSF (China)(4141101031 ; NSF (China)(4141101031 ; NSF (China)(4141101031 ; NSF (China)(4141101031 ; NSF (China)(4141101031 ; NSF (China)(4141101031 ; NSF (China)(4141101031 ; NSF (China)(4141101031 ; NSF (China)(4141101031 ; NSF (China)(4141101031 ; NSF (China)(4141101031 ; NSF (USA)(AGS1118325 ; NSF (USA)(AGS1118325 ; NSF (USA)(AGS1118325 ; NSF (USA)(AGS1118325 ; NSF (USA)(AGS1118325 ; NSF (USA)(AGS1118325 ; NSF (USA)(AGS1118325 ; NSF (USA)(AGS1118325 ; NSF (USA)(AGS1118325 ; NSF (USA)(AGS1118325 ; NSF (USA)(AGS1118325 ; NSF (USA)(AGS1118325 ; NSF (USA)(AGS1118325 ; NSF (USA)(AGS1118325 ; NSF (USA)(AGS1118325 ; NSF (USA)(AGS1118325 ; 2013CB955804) ; 2013CB955804) ; 2013CB955804) ; 2013CB955804) ; 2013CB955804) ; 2013CB955804) ; 2013CB955804) ; 2013CB955804) ; 2013CB955804) ; 2013CB955804) ; 2013CB955804) ; 2013CB955804) ; 2013CB955804) ; 2013CB955804) ; 2013CB955804) ; 2013CB955804) ; 91544217) ; 91544217) ; 91544217) ; 91544217) ; 91544217) ; 91544217) ; 91544217) ; 91544217) ; 91544217) ; 91544217) ; 91544217) ; 91544217) ; 91544217) ; 91544217) ; 91544217) ; 91544217) ; 1534670) ; 1534670) ; 1534670) ; 1534670) ; 1534670) ; 1534670) ; 1534670) ; 1534670) ; 1534670) ; 1534670) ; 1534670) ; 1534670) ; 1534670) ; 1534670) ; 1534670) ; 1534670)
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000376937000039
引用统计	被引频次：39[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/21535
专题	中科院安徽光学精密机械研究所
作者单位	1.Beijing Normal Univ, Coll Global Change & Earth Syst Sci, State Key Lab Earth Surface Processes & Resource, Beijing 100875, Peoples R China 2.Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20742 USA 3.Univ Maryland, Dept Atmospher & Ocean Sci, College Pk, MD 20742 USA 4.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing 100029, Peoples R China 5.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Key Lab Atmospher Composit & Opt Radiat, Hefei 230031, Peoples R China 6.Liaoning Weather Modificat Off, Shenyang 112000, Peoples R China 7.Chinese Acad Sci, Inst Atmospher Phys, Key Lab Middle Atmosphere & Global Environm Obses, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Fang,Li, Zhanqing,Li, Yanan,et al. Impacts of organic aerosols and its oxidation level on CCN activity from measurement at a suburban site in China[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2016,16(8):5413-5425.
APA	Zhang, Fang.,Li, Zhanqing.,Li, Yanan.,Sun, Yele.,Wang, Zhenzhu.,...&Wang, Qingqing.(2016).Impacts of organic aerosols and its oxidation level on CCN activity from measurement at a suburban site in China.ATMOSPHERIC CHEMISTRY AND PHYSICS,16(8),5413-5425.
MLA	Zhang, Fang,et al."Impacts of organic aerosols and its oxidation level on CCN activity from measurement at a suburban site in China".ATMOSPHERIC CHEMISTRY AND PHYSICS 16.8(2016):5413-5425.

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