Evidence for heterogeneous chlorine activation in the tropical UTLS (Articolo in rivista)

Type
Label
  • Evidence for heterogeneous chlorine activation in the tropical UTLS (Articolo in rivista) (literal)
Anno
  • 2010-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.5194/acpd-10-18063-2010 (literal)
Alternative label
  • M. von Hobe (1); J.-U. Grooß (1); G. Günther (1); P. Konopka (1); I. Gensch (1); M. Krämer (1); N. Spelten (1); A. Afchine (1); C. Schiller (1); A. Ulanovsky (2); N. Sitnikov (2); G. Shur (2); V. Yushkov (2); F. Ravegnani (3); F. Cairo (3); A. Roiger (4); C. Voigt (4); H. Schlager (4); R. Weigel (5); W. Frey (5); S. Borrmann (5); R. Müller (1); F. Stroh (1) (2010)
    Evidence for heterogeneous chlorine activation in the tropical UTLS
    in Atmospheric chemistry and physics discussion
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • M. von Hobe (1); J.-U. Grooß (1); G. Günther (1); P. Konopka (1); I. Gensch (1); M. Krämer (1); N. Spelten (1); A. Afchine (1); C. Schiller (1); A. Ulanovsky (2); N. Sitnikov (2); G. Shur (2); V. Yushkov (2); F. Ravegnani (3); F. Cairo (3); A. Roiger (4); C. Voigt (4); H. Schlager (4); R. Weigel (5); W. Frey (5); S. Borrmann (5); R. Müller (1); F. Stroh (1) (literal)
Pagina inizio
  • 18063 (literal)
Pagina fine
  • 18099 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://www.atmos-chem-phys-discuss.net/10/18063/2010/acpd-10-18063-2010.html (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 10 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 7 (literal)
Note
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1. Forschungszentrum Julich GmbH, Inst Energy & Climate Res Stratosphere IEK 7, Julich, Germany 2. Cent Aerol Observ, Moscow, Russia 3. Inst Atmospher Sci & Climate CNR ISAC, Italy 4. Deutsch Zentrum Luft & Raumfahrt, Inst Atmospher Phys, Oberpfaffenhofen, Germany 5. Johannes Gutenberg Univ Mainz, Inst Atmospher Phys, Mainz, Germany (literal)
Titolo
  • Evidence for heterogeneous chlorine activation in the tropical UTLS (literal)
Abstract
  • Airborne in-situ observations of ClO in the tropics were made during the TROCCINOX (Aracatuba, Brasil, 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 concur 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. 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. (literal)
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