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First satellite detection of volcanic OClO after the eruption of Puyehue‐Cordón Caulle
Author(s) -
Theys Nicolas,
De Smedt Isabelle,
Van Roozendael Michel,
Froidevaux Lucien,
Clarisse Lieven,
Hendrick François
Publication year - 2014
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1002/2013gl058416
Subject(s) - plume , volcano , microwave limb sounder , halogen , satellite , chlorine , ozone , stratosphere , environmental science , volcanic ash , atmospheric sciences , environmental chemistry , geology , remote sensing , chemistry , geochemistry , meteorology , physics , alkyl , organic chemistry , astronomy
Volcanoes release large amounts of halogen species such as HCl and HBr, which can be converted into reactive halogens by heterogeneous photochemical reactions that are currently not fully characterized. Here we report on the first satellite detection of volcanic chlorine dioxide (OClO). Measurements were performed using the Scanning Imaging Absorption Spectrometer for Atmospheric Chartography instrument for the ash‐laden plume emitted after the 2011 eruption of Puyehue‐Cordón Caulle in Chile. We also identified volcanic BrO using the Ozone Monitoring Instrument, as well as enhanced HCl in data of the Microwave Limb Sounder instrument. These observations suggest that OClO was formed in the plume by the ClO + BrO reaction in presence of a large excess of ClO. The present satellite data set could help better understand reactive halogen chemistry in volcanic plumes and its impact on atmospheric composition.