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Journal of Atmospheric Chemistry

, Volume 15, Issue 3–4, pp 361–367 | Cite as

Measurements of peroxyacetylnitrate in the marine boundary layer over the Atlantic

  • K. P. Müller
  • J. Rudolph
Article

Abstract

The atmospheric concentration of peroxyacetylnitrate (PAN) was measured during a cruise of the R.S. Polarstern from Bremerhaven (Germany) to Rio Grande do Sul (Brazil) in September/ October 1988. The measurements were made in-situ by a combination of electron capture gaschromatography with a cryogenic preconcentration step. The theoretical lower limit of detection (3σ) was 0.4 ppt. The mixing ratios of PAN varied by more than three orders of magnitude from 2000 ppt in the English Channel to less than 0.4 ppt south of the Azores (38° N). South of 35° N, PAN levels were below the detection limit, except at 30–31° S off the eastern coast of South America. Here, PAN mixing ratios of 10 to 100 ppt were detected in continentally influenced air masses. Detectable levels of PAN were mostly observed in air masses of continental or high northern origin. Changes in the wind directions were usually associated with substantial changes in the PAN mixing ratios.

Key words

Peroxyacetylnitrate marine boundary layer Atlantie Ocean 

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Copyright information

© Kluwer Academic Publishers 1992

Authors and Affiliations

  • K. P. Müller
    • 1
  • J. Rudolph
    • 1
  1. 1.Institut für Atmosphärische ChemieKernforschungsanlage Jülich GmbHJülichF.R.G.

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