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Evidence for strong, widespread chlorine radical chemistry associated with pollution outflow from continental Asia

Baker, Angela K.; Sauvage, Carina; Thorenz, Ute R.; van Velthoven, Peter; Oram, David E.; Zahn, Andreas; Brenninkmeijer, Carl A. M.; Williams, Jonathan

Abstract:
The chlorine radical is a potent atmospheric oxidant, capable of perturbing tropospheric oxidative
cycles normally controlled by the hydroxyl radical. Significantly faster reaction rates allow chlorine
radicals to expedite oxidation of hydrocarbons, including methane, and in polluted environments, to
enhance ozone production. Here we present evidence, from the CARIBIC airborne dataset, for extensive
chlorine radical chemistry associated with Asian pollution outflow, from airborne observations made
over the Malaysian Peninsula in winter. This region is known for persistent convection that regularly
delivers surface air to higher altitudes and serves as a major transport pathway into the stratosphere.
Oxidant ratios inferred from hydrocarbon relationships show that chlorine radicals were regionally more
important than hydroxyl radicals for alkane oxidation and were also important for methane and alkene
oxidation (>10%). ... mehr

Abstract (englisch):
The chlorine radical is a potent atmospheric oxidant, capable of perturbing tropospheric oxidative cycles normally controlled by the hydroxyl radical. Significantly faster reaction rates allow chlorine radicals to expedite oxidation of hydrocarbons, including methane, and in polluted environments, to enhance ozone production. Here we present evidence, from the CARIBIC airborne dataset, for extensive chlorine radical chemistry associated with Asian pollution outflow, from airborne observations made over the Malaysian Peninsula in winter. This region is known for persistent convection that regularly delivers surface air to higher altitudes and serves as a major transport pathway into the stratosphere. ... mehr

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Volltext §
DOI: 10.5445/IR/1000062925
Originalveröffentlichung
DOI: 10.1038/srep36821
Scopus
Zitationen: 9
Web of Science
Zitationen: 10
Coverbild
Zugehörige Institution(en) am KIT Fakultät für Physik (PHYSIK)
Institut für Meteorologie und Klimaforschung - Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
Publikationstyp Zeitschriftenaufsatz
Jahr 2016
Sprache Englisch
Identifikator ISSN: 2045-2322
urn:nbn:de:swb:90-629254
KITopen-ID: 1000062925
HGF-Programm 12.03.01 (POF III, LK 01)
Erschienen in Scientific reports
Band 6
Seiten 36821
Nachgewiesen in Web of Science
Scopus
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