气候变化领域集成服务门户(CCPortal): Impacts of some co-dissolved inorganics on in-cloud photochemistry of aqueous brown carbon

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DOI	10.1016/j.atmosenv.2019.117250
	Impacts of some co-dissolved inorganics on in-cloud photochemistry of aqueous brown carbon
	Ray D.; Ghosh S.K.; Raha S.
发表日期	2020
ISSN	1352-2310
卷号	223
英文摘要	This experimental study explored the impacts of some codissolved inorganic ions (in particular, sulfate, nitrate and chloride) on the photo-bleaching kinetics of the aqueous solutions of brown carbon (BrC) extracted from rice-straw smoldering aerosol. All the aqueous BrC solutions showed two distinct phases of decreasing mass absorption coefficient (MAC) with irradiation time, where the first phase (0–1h) was 2.4–5.3 times faster than the second phase (1–3h). Interestingly, the photo-bleaching process was slowed down for both phases when SO42− (0–1h: 0.196±0.02 h−1; 1–3h: 0.045±0.01 h−1), NO3− (0–1h: 0.158±0.004 h−1; 1–3h: 0.066±0.007 h−1) and Cl− (0–1h: 0.169±0.007 h−1; 1–3h: 0.032±0.006 h−1) salt solutions were added separately to the BrC extracts (0–1h: 0.27±0.04 h−1; 1–3h: 0.067±0.01 h−1). Alternatively, the corresponding lifetimes of the light-absorbing organic species were enhanced in the salt-added BrC solutions. In addition, the magnitudes of the fluorescence quantum yields were measured to be of the order of 10−3−10−2, implying that most of the absorbed solar energy would convert into heat rather than fluorescing back into the atmosphere. The findings of this study are suggestive of possible increase in heating of BrC containing atmospheric aqueous bodies like cloud-water, resulting in water evaporation and hence reduced precipitation (semi-direct effect). © 2019 Elsevier Ltd
关键词	Aerosol-cloud interaction Biomass burning brown carbon Photo-bleaching kinetics
语种	英语
scopus关键词	Aerosols; Bleaching; Carbon; Chlorine compounds; Cleaning; Image processing; Precipitation (meteorology); Solar energy; Sulfur compounds; Aerosol-cloud interaction; Biomass-burning; Brown carbons; Fluorescence quantum yield; Irradiation time; Mass absorption coefficient; Organic species; Water evaporation; Bromine compounds; carbon; chloride; ion; nitrate; sulfate; absorption coefficient; aerosol; aqueous solution; biomass burning; brown carbon; experimental study; photochemistry; precipitation (chemistry); reaction kinetics; volcanic cloud; absorption; aerosol; aqueous solution; bleaching; cloud; evaporation; fluorescence; Fourier transform infrared spectroscopy; heating; ion chromatography; irradiation; light absorption; particulate matter; photochemistry; precipitation; priority journal; quantum yield; solar energy; spectrofluorometry
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/249371
作者单位	Environmental Sciences Section, Bose Institute, P 1/12 CIT Scheme VII-M, Kolkata, 700054, India; Department of Physics, Bose Institute, 93/1, A.P.C Road, Kolkata, 700009, India; Centre for Astroparticle Physics and Space Science, Block-EN, Sector-V, Salt Lake, Kolkata, 700091, India
推荐引用方式 GB/T 7714	Ray D.,Ghosh S.K.,Raha S.. Impacts of some co-dissolved inorganics on in-cloud photochemistry of aqueous brown carbon[J],2020,223.
APA	Ray D.,Ghosh S.K.,&Raha S..(2020).Impacts of some co-dissolved inorganics on in-cloud photochemistry of aqueous brown carbon.ATMOSPHERIC ENVIRONMENT,223.
MLA	Ray D.,et al."Impacts of some co-dissolved inorganics on in-cloud photochemistry of aqueous brown carbon".ATMOSPHERIC ENVIRONMENT 223(2020).