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Effect of volcanic aerosol on stratospheric NO₂ and N₂O₅ from 2002-2014 as measured by Odin-OSIRIS and Envisat-MIPAS

Adams, Cristen; Bourassa, Adam E.; McLinden, Chris A.; Sioris, Chris E.; Clarmann, Thomas von; Funke, Bernd; Rieger, Landon A.; Degenstein, Douglas A.

Abstract:
Following the large volcanic eruptions of Pinatubo in 1991 and El Chichón in 1982, decreases in stratospheric NO₂ associated with enhanced aerosol were observed. The Optical Spectrograph and Infrared Imaging Spectrometer (OSIRIS) measured the widespread enhancements of stratospheric aerosol following seven volcanic eruptions between 2002 and 2014, although the magnitudes of these eruptions were all much smaller than the Pinatubo and El Chichón eruptions. In order to isolate and quantify the relationship between volcanic aerosol and NO₂, NO₂ anomalies were calculated using measurements from OSIRIS and the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS). In the tropics, variability due to the quasi-biennial oscillation was subtracted from the time series. OSIRIS profile measurements indicate that the strongest anticorrelations between NO₂ and volcanic aerosol extinction were for the 5 km layer starting  ∼  3 km above the climatological mean tropopause at the given latitude. OSIRIS stratospheric NO₂ partial columns in this layer were found to be smaller than background NO₂ levels during these aerosol enhancements by u ... mehr


Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator DOI: 10.5194/acp-17-8063-2017
ISSN: 1680-7316, 1680-7324
URN: urn:nbn:de:swb:90-715972
KITopen ID: 1000071597
HGF-Programm 12.04.05; LK 01
Erschienen in Atmospheric chemistry and physics
Band 17
Heft 13
Seiten 8063-8080
Lizenz CC BY 3.0 DE: Creative Commons Namensnennung 3.0 Deutschland
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