English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/133589
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Title

Lifetime and production rate of NOx in the upper stratosphere and lower mesosphere in the polar spring/summer after the solar proton event in October–November 2003

AuthorsFriederich, F.; Von Clarmann, T.; Funke, Bernd ; Nieder, H.; Orphal, J.; Sinnhuber, M.; Stiller, G.P.; Wissing, J.M
KeywordsStratosphere
Atmospheric chemistry
Polar region
Solar radiation
Atmospheric transport
Envisat-1
Mesosphere
Nitrogen oxides
Photochemistry
Issue Date2013
PublisherCopernicus Publications
CitationAtmospheric Chemistry and Physics 13: 2531- 2539 (2013)
AbstractWe present altitude-dependent lifetimes of NOx, determined with MIPAS/ENVISAT (the Michelson Interferometer for Passive Atmospheric Sounding/the European Environment Satellite), for the Southern polar region after the solar proton event in October-November 2003. Between 50° S and 90° S and decreasing in altitude they range from about two days at 64 km to about 20 days at 44 km. The lifetimes are controlled by transport, mixing and photochemistry. We infer estimates of dynamical lifetimes by comparison of the observed decay to photochemical lifetimes calculated with the SLIMCAT 3-D Model. Photochemical loss contributes to the observed NOx depletion by 0.1% at 44 km, increasing with altitude to 45% at 64 km. <br><br> In addition, we show the correlation of modelled ionization rates and observed NOx densities under consideration of the determined lifetimes of NOx, and calculate altitude-dependent effective production rates of NOx due to ionization. For that we compare ionization rates of the AIMOS data base with the MIPAS measurements from 15 October-31 December 2003. We derive effective NOx-production rates to be applied to the AIMOS ionization rates which range from about 0.2 NOx-molecules per ion pair at 44 km to 0.7 NOx-molecules per ion pair at 62 km. These effective production rates are considerably lower than predicted by box model simulations which could hint at an overestimation of the modelled ionization rates. © Author(s) 2013.
URIhttp://hdl.handle.net/10261/133589
DOI10.5194/acp-13-2531-2013
Identifiersdoi: 10.5194/acp-13-2531-2013
issn: 1680-7316
Appears in Collections:(IAA) Artículos
Files in This Item:
File Description SizeFormat 
acp_13_2531_2013.pdf731,15 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.