Aircraft observations of NO, NO y , CO, and O 3 in the upper troposphere from 60°N to 60°S ‐ Interhemispheric differences at mitlatitudes

Measurements of NO, NO y , CO, and O 3 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...

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Bibliographic Details
Published in:Geophysical research letters 2003-06, Vol.30 (11)
Main Authors: Baehr, Janine, Schlager, Hans, Ziereis, Helmut, Stock, Paul, van Velthoven, Peter, Busen, Reinhold, Ström, Johan, Schumann, Ulrich
Format: Article
Language:English
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Summary:Measurements of NO, NO y , CO, and O 3 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, NO y , O 3 , 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 NO y data so far available for the middle and upper troposphere at southern midlatitudes.
ISSN:0094-8276
1944-8007
DOI:10.1029/2003GL016935