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AGU: Geophysical Research Letters

 

Index Terms

  • Atmospheric Composition and Structure: Constituent sources and sinks
  • Atmospheric Composition and Structure: Troposphere—composition and chemistry
  • Atmospheric Composition and Structure: Troposphere—constituent transport and chemistry

Abstract

Aircraft observations of NO, NOy, CO, and O3 in the upper troposphere from 60°N to 60°S - Interhemispheric differences at mitlatitudes

Janine Baehr

Deutsches Zentrum für Luft - und Raumfahrt (DLR), Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany

Hans Schlager

Deutsches Zentrum für Luft - und Raumfahrt (DLR), Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany

Helmut Ziereis

Deutsches Zentrum für Luft - und Raumfahrt (DLR), Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany

Paul Stock

Deutsches Zentrum für Luft - und Raumfahrt (DLR), Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany

Peter van Velthoven

Royal Netherlands Meteorological Institute (KNMI), Atmospheric Composition Research, De Bilt, The Netherlands

Reinhold Busen

Deutsches Zentrum für Luft - und Raumfahrt (DLR), Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany

Johan Ström

Institute of Applied Environmental Research, Stockholm Univ., Stockholm, Sweden

Ulrich Schumann

Deutsches Zentrum für Luft - und Raumfahrt (DLR), Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany

Measurements of NO, NOy, CO, and O3 made in the middle and upper troposphere over Punta Arenas, Chile (53°S) and Prestwick, Scotland (55°N) during the INCA (Interhemispheric Differences in Cirrus Properties from Anthropogenic Emissions) experiment in 2000 are used to examine the interhemispheric differences in the abundance of these species during local autumn. Median mixing ratios of NO, NOy, O3, and CO in the upper troposphere (8 km-tropopause) are 4.5, 3, 1.5 and 1.2 times higher over Prestwick compared to Punta Arenas, respectively. Corresponding enhancement factors for the middle troposphere are 5, 7.8, 1.5, and 1.4. The present data represent a considerable extension of the sparse NO and NOy data so far available for the middle and upper troposphere at southern midlatitudes.

Received 16 January 2003; accepted 14 May 2003; published 14 June 2003.

Citation: Baehr, J., H. Schlager, H. Ziereis, P. Stock, P. van Velthoven, R. Busen, J. Ström, and U. Schumann (2003), Aircraft observations of NO, NOy, CO, and O3 in the upper troposphere from 60°N to 60°S - Interhemispheric differences at mitlatitudes, Geophys. Res. Lett., 30(11), 1598, doi:10.1029/2003GL016935.

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