elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Evidence for heterogeneous chlorine activation in the tropical UTLS

von Hobe, M. and Grooß, J.-U. and Günther, G. and Konopka, P. and Gensch, I. and Krämer, M. and Spelten, N. and Afchine, A. and Schiller, C. and Ulanovsky, A. and Sitnikov, N. and Shur, G. and Yushkov, V. and Ravegnani, F. and Cairo, F. and Roiger, A. and Voigt, C. and Schlager, H. and Weigel, R. and Frey, W. and Borrmann, S. and Müller, R. and Stroh, F. (2011) Evidence for heterogeneous chlorine activation in the tropical UTLS. Atmospheric Chemistry and Physics, 11, pp. 241-256. Copernicus Publications. DOI: 10.5194/acp-11-241-2011

[img]
Preview
PDF
667kB

Official URL: http://www.atmos-chem-phys.net/11/241/2011/

Abstract

Airborne in-situ observations of ClO in the tropics were made during the TROCCINOX (Aracatuba, Brazil, February 2005) and SCOUT-O3 (Darwin, Australia, November/ December 2005) field campaigns. While during most flights significant amounts of ClO (�10�20 parts per trillion, ppt) were present only in aged stratospheric air, instances of enhanced ClO mixing ratios of up to 40 ppt � significantly exceeding those expected from gas phase chemistry � were observed in air masses of a more tropospheric character. Most of these observations are associated with low temperatures or with the presence of cirrus clouds (often both), suggesting that cirrus ice particles and/or liquid aerosol at low temperatures may promote significant heterogeneous chlorine activation in the tropical upper troposphere lower stratosphere (UTLS). In two case studies, particularly high levels of ClO observed were reproduced by chemistry simulations only under the assumption that significant denoxification had occurred in the observed air. However, to reproduce the ClO observations in these simulations, O3 mixing ratios higher than observed had to be assumed, and at least for one of these flights, a significant denoxification is in contrast to the observed NO levels, suggesting that the coupling of chlorine and nitrogen compounds in the tropical UTLS may not be completely understood.

Item URL in elib:https://elib.dlr.de/71761/
Document Type:Article
Title:Evidence for heterogeneous chlorine activation in the tropical UTLS
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
von Hobe, M.FZ JülichUNSPECIFIED
Grooß, J.-U.FZ JülichUNSPECIFIED
Günther, G.FZ JülichUNSPECIFIED
Konopka, P.FZ JülichUNSPECIFIED
Gensch, I.FZ JülichUNSPECIFIED
Krämer, M.FZ JülichUNSPECIFIED
Spelten, N.FZ JülichUNSPECIFIED
Afchine, A.FZ JülichUNSPECIFIED
Schiller, C.FZ JülichUNSPECIFIED
Ulanovsky, A.ISTC, Dolgoprudny, Moscow, RUNSPECIFIED
Sitnikov, N.ISTC, Dolgoprudny, Moscow, RUNSPECIFIED
Shur, G.ISTC, Dolgoprudny, Moscow, RUNSPECIFIED
Yushkov, V.ISTC, Dolgoprudny, Moscow, RUNSPECIFIED
Ravegnani, F.CNR-ISAC, Bologna, IUNSPECIFIED
Cairo, F.CNR-ISAC, Bologna, IUNSPECIFIED
Roiger, A.DLRUNSPECIFIED
Voigt, C.DLRUNSPECIFIED
Schlager, H.DLRUNSPECIFIED
Weigel, R.Univ. MainzUNSPECIFIED
Frey, W.Univ. MainzUNSPECIFIED
Borrmann, S.Univ. MainzUNSPECIFIED
Müller, R.FZ JülichUNSPECIFIED
Stroh, F.FZ JülichUNSPECIFIED
Date:2011
Journal or Publication Title:Atmospheric Chemistry and Physics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:11
DOI :10.5194/acp-11-241-2011
Page Range:pp. 241-256
Publisher:Copernicus Publications
Status:Published
Keywords:airborne in-situ observation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:ATM and Operation (old)
DLR - Research area:Aeronautics
DLR - Program:L AO - Air Traffic Management and Operation
DLR - Research theme (Project):L - Climate, Weather and Environment (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Trace Species
Deposited By: Freund, Jana
Deposited On:17 Nov 2011 16:04
Last Modified:02 May 2019 14:04

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.