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Photodissociation o...
Photodissociation of particulate nitrate as a source of daytime tropospheric Cl2
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Peng, X. (author)
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Wang, T. (author)
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Wang, W. (author)
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Ravishankara, A. R. (author)
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George, C. (author)
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Xia, M. (author)
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Cai, M. (author)
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Li, Q. (author)
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- Salvador, Christian Mark, 1989 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för kemi och molekylärbiologi,Department of Chemistry and Molecular Biology
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Lau, C. (author)
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Lyu, X. (author)
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Poon, C. N. (author)
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Mellouki, A. (author)
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Mu, Y. (author)
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- Hallquist, Mattias, 1969 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för kemi och molekylärbiologi,Department of Chemistry and Molecular Biology
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Saiz-Lopez, A. (author)
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Guo, H. (author)
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Herrmann, H. (author)
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Yu, C. (author)
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Dai, J. (author)
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Wang, Y. (author)
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Wang, X. (author)
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Yu, A. (author)
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Leung, K. (author)
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Lee, S. (author)
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Chen, J. (author)
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(creator_code:org_t)
- 2022-02-17
- 2022
- English.
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In: Nature Communications. - : Springer Science and Business Media LLC. - 2041-1723. ; 13:1
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https://www.nature.c...
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https://gup.ub.gu.se...
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https://doi.org/10.1...
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Abstract
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- Chlorine atoms (Cl) are highly reactive and can strongly influence the abundances of climate and air quality-relevant trace gases. Despite extensive research on molecular chlorine (Cl2), a Cl precursor, in the polar atmosphere, its sources in other regions are still poorly understood. Here we report the daytime Cl2 concentrations of up to 1 ppbv observed in a coastal area of Hong Kong, revealing a large daytime source of Cl2 (2.7 pptv s−1 at noon). Field and laboratory experiments indicate that photodissociation of particulate nitrate by sunlight under acidic conditions (pH < 3.0) can activate chloride and account for the observed daytime Cl2 production. The high Cl2 concentrations significantly increased atmospheric oxidation. Given the ubiquitous existence of chloride, nitrate, and acidic aerosols, we propose that nitrate photolysis is a significant daytime chlorine source globally. This so far unaccounted for source of chlorine can have substantial impacts on atmospheric chemistry. © 2022, The Author(s).
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
- NATURVETENSKAP -- Kemi -- Analytisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Analytical Chemistry (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Klimatforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Climate Research (hsv//eng)
Keyword
- air
- atmospheric chemistry
- chloride
- chlorine
- nitrate
- photolysis
- China
- Hong Kong
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Peng, X.
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Wang, T.
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Wang, W.
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Ravishankara, A. ...
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George, C.
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Xia, M.
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show more...
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Cai, M.
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Li, Q.
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Salvador, Christ ...
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Lau, C.
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Lyu, X.
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Poon, C. N.
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Mellouki, A.
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Mu, Y.
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Hallquist, Matti ...
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Saiz-Lopez, A.
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Guo, H.
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Herrmann, H.
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Yu, C.
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Dai, J.
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Wang, Y.
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Wang, X.
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Yu, A.
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Leung, K.
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Lee, S.
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Chen, J.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Environmental Sc ...
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NATURAL SCIENCES
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and Chemical Science ...
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and Analytical Chemi ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Meteorology and ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Inorganic Chemis ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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University of Gothenburg