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Analysis of the origin of the distribution of CO in the subtropical southern Indian Ocean in 2007

dc.contributor.authorDuflot, V.
dc.contributor.authorDils, B.
dc.contributor.authorBaray, J.L.
dc.contributor.authorDe Mazière, M.
dc.contributor.authorAttié, J.L.
dc.contributor.authorVanhaelewyn, G.
dc.contributor.authorSenten, C.
dc.contributor.authorVigouroux, C.
dc.contributor.authorClain, G.
dc.contributor.authorDelmas, R.
dc.date2010
dc.date.accessioned2016-03-31T12:16:17Z
dc.date.available2016-03-31T12:16:17Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/3221
dc.descriptionWe show carbon monoxide (CO) distributions at different vertical levels over the subtropical southern Indian Ocean, analyzing an observation campaign using Fourier transform infrared (FTIR) solar absorption spectrometry performed in 2007 at Reunion Island (21°S, 55°E). The CO pollution levels detected by the FTIR measurements during the campaign show a doubling of the CO total columns during the Southern Hemisphere biomass burning season. Using correlative data from the Measurement of Pollution in the Troposphere instrument and back trajectories analyses, we show that the potential primary sources for CO throughout the troposphere in 2007 are southern Africa (June-August) and South America (September-October). A secondary potential contribution from Southeast Asia and Indonesia-Malaysia was identified in the upper troposphere, especially in July and September. We examine the relation between the Asian monsoon anticyclone seasonal cycle and this result. We also investigate the relative contribution of different areas across the globe to the CO concentration in the subtropical southern Indian Ocean in 2007 using backward simulations combining the Lagrangian model FLEXPART 6.2, the Global Fire Emissions Database (GFEDv2.1) and the Emission Database for Global Atmospheric Research (EDGARv3.2-FT2000). We confirm the predominance of the African and South American contributions in the CO concentration in the southern subtropical Indian Ocean below 11 km. We show that CO transported from Australia makes only a small contribution to the total CO concentration observed over Reunion Island, and that the long-range transport of CO coming from Southeast Asia and Indonesia-Malaysia is important, especially from June until September in the upper troposphere.
dc.languageeng
dc.titleAnalysis of the origin of the distribution of CO in the subtropical southern Indian Ocean in 2007
dc.typeArticle
dc.subject.frascatiEarth and related Environmental sciences
dc.audienceScientific
dc.subject.freeAbsorption spectroscopy
dc.subject.freeCarbon monoxide
dc.subject.freeClimatology
dc.subject.freeComputer simulation
dc.subject.freeFourier transforms
dc.subject.freeLagrange multipliers
dc.subject.freePollution detection
dc.subject.freeTropics
dc.subject.freeTroposphere
dc.subject.freeAsian monsoon
dc.subject.freeAtmospheric research
dc.subject.freeAustralia
dc.subject.freeBack trajectories
dc.subject.freeBiomass-burning
dc.subject.freeCO concentrations
dc.subject.freeFourier transform infrared
dc.subject.freeFTIR measurements
dc.subject.freeGlobal fire
dc.subject.freeIndian ocean
dc.subject.freeIndonesia
dc.subject.freeLagrangian models
dc.subject.freeLong range transport
dc.subject.freeMalaysia
dc.subject.freePollution level
dc.subject.freePrimary sources
dc.subject.freeRelative contribution
dc.subject.freeSeasonal cycle
dc.subject.freeSolar absorption
dc.subject.freeSouth America
dc.subject.freeSoutheast Asia
dc.subject.freeSouthern Hemisphere
dc.subject.freeSouthern Indian ocean
dc.subject.freeUpper troposphere
dc.subject.freeOceanography
dc.subject.freeatmospheric pollution
dc.subject.freebiomass burning
dc.subject.freecarbon monoxide
dc.subject.freedatabase
dc.subject.freeFTIR spectroscopy
dc.subject.freepollutant transport
dc.subject.freeseasonality
dc.subject.freeSouthern Hemisphere
dc.subject.freesubtropical region
dc.subject.freetroposphere
dc.subject.freevertical distribution
dc.subject.freeAustralia
dc.subject.freeIndian Ocean
dc.subject.freeIndian Ocean (South)
dc.subject.freeMascarene Islands
dc.subject.freeReunion
dc.subject.freeSoutheast Asia
dc.source.titleJournal of Geophysical Research Atmospheres
dc.source.volume115
dc.source.issue22
dc.source.pageD22106
Orfeo.peerreviewedYes
dc.identifier.doi10.1029/2010JD013994
dc.identifier.scopus2-s2.0-78649498973


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