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Article Dans Une Revue Geophysical Research Letters Année : 2005

Extreme CO concentrations in the upper troposphere over northeast Asia in June 2003 from the in situ MOZAIC aircraft data

Jérôme Brioude
Bastien Sauvage
Jean-Pierre Cammas
Andreas Stohl

Résumé

This paper analyses 320 MOZAIC (Measurements of Ozone aboard Airbus in-service airCraft) flights between Europe and East Asia in the year 2003. Carbon monoxide (CO) measurements in the upper troposphere (UT) clearly show the influence of plumes from boreal forest fires burning around Lake Baikal between April and July. On many flights, CO concentrations were above 300 ppbv over several hundred kilometers, with values above 500 ppbv over 50 kilometers and peaks up to 800 ppbv. To our knowledge, such high UT CO concentrations have never been reported before. A case study reveals that biomass burning plumes were rapidly transported by a warm conveyor belt. On the regional and seasonal scale, MOZAIC monthly-mean concentrations were above 150 ppbv on average, i.e. 30% above the northern hemisphere background as determined over Europe.
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hal-00561872 , version 1 (21-10-2021)

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Philippe Nédélec, Valérie Thouret, Jérôme Brioude, Bastien Sauvage, Jean-Pierre Cammas, et al.. Extreme CO concentrations in the upper troposphere over northeast Asia in June 2003 from the in situ MOZAIC aircraft data. Geophysical Research Letters, 2005, 32 (L14), pp.L14807. ⟨10.1029/2005GL023141⟩. ⟨hal-00561872⟩
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