Vertical profile of peroxyacetyl nitrate PAN from MIPAS-STR measurements over Brazil in February 2005 and the role of PAN in the UT tropical NOy partitioningReportar como inadecuado




Vertical profile of peroxyacetyl nitrate PAN from MIPAS-STR measurements over Brazil in February 2005 and the role of PAN in the UT tropical NOy partitioning - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

1 IMK - Institute for Meteorology and Climate Research 2 ISAC - CNR Institute of Atmospheric Sciences and Climate 3 Institut für Physik der Atmosphäre 4 CAO - Central Aerological Observatory

Abstract : We report on the retrieval of PAN CH3COOONO2 in the upper tropical troposphere from limb measurements by the remote-sensor MIPAS-STR on board the Russian high altitude research aircraft M55-Geophysica. The measurements were performed close to Araçatuba, 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 CH3CCl3, 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



Autor: C. Keim - G. Y. Liu - C. E. Blom - H. Fischer - T. Gulde - M. Höpfner - C. Piesch - F. Ravegnani - A. Roiger - H. Schlager - N.

Fuente: https://hal.archives-ouvertes.fr/



DESCARGAR PDF




Documentos relacionados