HR: 0800h
AN: A21B-0735    [Abstracts]
TI: MIXING LAYER: THE MID-LATITUDE TROPOPAUSE AS SEEN BY MOZAIC AIRCRAFT IN-SITU MEASUREMENTS OF OZONE AND CARBON MONOXIDE.
AU: * CAMMAS, J
EM: camjp@aero.obs-mip.fr
AF: LABORATOIRE D'AEROLOGIE OBSERVATOIRE MIDI-PYRENEES, 14 AVENUE E. BELIN, TOULOUSE, 31400 France
AU: BRIOUDE, J
EM: brij@aero.obs-mip.fr
AF: LABORATOIRE D'AEROLOGIE OBSERVATOIRE MIDI-PYRENEES, 14 AVENUE E. BELIN, TOULOUSE, 31400 France
AB: MOZAIC in-situ measurements of ozone, water vapour, carbon monoxide and nitrogen oxide in the Upper-Troposphere and Lower-Stratosphere (UTLS) are daily collected since January 2002 by 5 commercial aircraft along routes between Europe and western America and eastern Asia. Mixing lines of O3 and CO in the UTLS region are analysed. A mixing layer across the tropopause is identified. Observations of the mixing layer are sorted by regions (Europe, Atlantic, Northeast America, Asia) and seasons, and are analysed with respect to zonal differences in upper level dynamics and in surface CO emissions. Interpretations are further conducted with the analysis of 5-days backward trajectories of air parcels initialized along aircraft paths and driven by ECMWF-analysed winds. Case studies of MOZAIC observations of long-range tropospheric transport and of stratospheric injection of high CO values due to the conjunction of boreal biomass fires and deep convection over Northwest Canada in June-July 2004 during the ICARTT campaign will be presented.
UR: http://www.aero.obs-mip.fr/mozaic/
DE: 3362 Stratosphere/troposphere interactions
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0345 Pollution--urban and regional (0305)
DE: 0365 Troposphere--composition and chemistry
DE: 0368 Troposphere--constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting