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Journal of Atmospheric Chemistry

, Volume 22, Issue 3, pp 251–269 | Cite as

The tropospheric distribution of formaldehyde during TROPOZ II

  • D. W. Arlander
  • D. Brüning
  • U. Schmidt
  • D. H. Ehhalt
Article

Abstract

A series of 149 measurements of the HCHO mixing ratio were made between 0 and 10 km altitude and 70° N to 60° S latitude during TROPOZ II. The data show a vertical decrease of the HCHO mixing ratio with altitude at all latitudes and a broad latitudinal maximum in the HCHO mixing ratio between 30° N and 30° S at all altitudes. The measured mixing ratios of HCHO are considerably higher than those expected from CH4 oxidation alone, but agree broadly with the average latitude by altitude distribution of HCHO derived by a 2D model including emissions of C1–C7 hydrocarbons. A number of the regional scale deviations of the measured HCHO distribution from the average modelled one can be explained in terms of the local wind field.

Key words

formaldehyde background troposphere concentration distribution aircraft sampling technique methane oxidation 

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Copyright information

© Kluwer Academic Publishers 1995

Authors and Affiliations

  • D. W. Arlander
    • 1
  • D. Brüning
    • 1
  • U. Schmidt
    • 1
  • D. H. Ehhalt
    • 1
  1. 1.Institüt für Atmosphärische ChemieForschungszentrum Jülich GmbHJülichGermany

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