elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Impressum | Kontakt | English
Schriftgröße: [-] Text [+]

Vertical profile of peroxyacetyl nitrate (PAN) from MIPAS-STR measurements over Brazil in February 2005 and its contribution to tropical UT NOy partitioning

Keim, C. und Liu, G.Y. und Blom, C.E. und Fischer, H. und Gulde, T. und Höpfner, M. und Piesch, C. und Ravegnani, F. und Roiger, A. und Schlager, H. und Sitnikov, N. (2008) Vertical profile of peroxyacetyl nitrate (PAN) from MIPAS-STR measurements over Brazil in February 2005 and its contribution to tropical UT NOy partitioning. Atmospheric Chemistry and Physics, 8, Seiten 4891-4902.

[img]
Vorschau
PDF - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
1MB

Offizielle URL: http://www.cosis.net/members/journals/df/volumes.php?j_id=2

Kurzfassung

We report on the retrieval of PAN (CH<sub>3</sub>C(O)OONO<sub>2</sub>) in the upper tropical troposphere from limb measurements by the remote-sensor MIPASSTR on board the Russian high altitude research aircraft M55-Geophysica. The measurements were performed close to Arac¸atuba, Brazil, on 17 February 2005. The retrieval was made in the spectral range 775–820 cm−1 where PAN exhibits its strongest feature but also more than 10 species interfere. Especially trace gases such as CH<sub>3</sub>CCl<sub>3</sub>, CFC- 113, CFC-11, and CFC-22, emitting also in spectrally broad not-resolved branches, make the processing of PAN prone to errors. Therefore, the selection of appropriate spectral windows, the separate retrieval of several interfering species and the careful handling of the water vapour profile are part of the study presented. The retrieved profile of PAN has a maximum of about 0.14 ppbv at 10 km altitude, slightly larger than the lowest reported values (.lt. 0.1 ppbv) and much lower than the highest reported in the literature (0.65 ppbv). Besides the NOy constituents measured by MIPAS-STR (HNO<sub>3</sub>, ClONO<sub>2</sub>, O<sub>2</sub>NO<sub>2</sub>, PAN), the in situ instruments aboard the Geophysica provide simultaneous measurements of NO, NO<sub>2</sub>, and the sum NO<sub>y</sub>. Comparing the sum of in-situ and remotely derived NO+NO<sub>2</sub>+HNO<sub>3</sub>+ClONO<sub>2</sub> +HO<sub>2</sub>NO<sub>2</sub>+PAN with total NO<sub>y</sub> a deficit of 30–40% (0.2–0.3 ppbv) in the troposphere remains unexplained whereas the values fit well in the stratosphere.

Dokumentart:Zeitschriftenbeitrag
Titel:Vertical profile of peroxyacetyl nitrate (PAN) from MIPAS-STR measurements over Brazil in February 2005 and its contribution to tropical UT NOy partitioning
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Keim, C.FZ Karlsruhe, Karlsruhe
Liu, G.Y.FZ Karlsruhe, Karlsruhe
Blom, C.E.FZ Karlsruhe, Karlsruhe
Fischer, H.FZ Karlsruhe, Karlsruhe
Gulde, T.FZ Karlsruhe, Karlsruhe
Höpfner, M.FZ Karlsruhe, Karlsruhe
Piesch, C.FZ Karlsruhe, Karlsruhe
Ravegnani, F.ISAC-CNR, Bologna, I
Roiger, A.NICHT SPEZIFIZIERT
Schlager, H.NICHT SPEZIFIZIERT
Sitnikov, N.Central Aerological Observatory, Dolgoprudny, R
Datum:2008
Erschienen in:Atmospheric Chemistry and Physics
Referierte Publikation:Ja
In Open Access:Ja
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:8
Seitenbereich:Seiten 4891-4902
Status:veröffentlicht
Stichwörter:tropical composition, reactive nitrogen, peroxyacetylnitrate (PAN), MIPAS-STR
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:L VU - Luftverkehr und Umwelt (alt)
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L VU - Luftverkehr und Umwelt
DLR - Teilgebiet (Projekt, Vorhaben):L - Luftverkehr und Wetter (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Physik der Atmosphäre > Atmosphärische Spurenstoffe
Hinterlegt von: Jana Freund
Hinterlegt am:18 Sep 2008
Letzte Änderung:20 Okt 2014 14:32

Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags

Blättern
Suchen
Hilfe & Kontakt
Informationen
electronic library verwendet EPrints 3.3.12
Copyright © 2008-2013 Deutsches Zentrum für Luft- und Raumfahrt (DLR). Alle Rechte vorbehalten.