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	13522310
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 [Formula presented] (0–1h: 0.196[Formula presented]0.02 [Formula presented]; 1–3h: 0.045[Formula presented]0.01 [Formula presented]), [Formula presented] (0–1h: 0.158[Formula presented]0.004 [Formula presented]; 1–3h: 0.066[Formula presented]0.007 [Formula presented]) and [Formula presented] (0–1h: 0.169[Formula presented]0.007 [Formula presented]; 1–3h: 0.032[Formula presented]0.006 [Formula presented]) salt solutions were added separately to the BrC extracts (0–1h: 0.27[Formula presented]0.04 [Formula presented]; 1–3h: 0.067[Formula presented]0.01 [Formula presented]). 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 [Formula presented], 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
英文关键词	Aerosol-cloud interaction; Biomass burning; brown carbon; Photo-bleaching kinetics
学科领域	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
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
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/120864
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.
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.
MLA	Ray D.,et al."Impacts of some co-dissolved inorganics on in-cloud photochemistry of aqueous brown carbon".Atmospheric Environment (2020).