MozartV1, PascalFrancis, Corpus, bibRecord, 000026

Variability in tropospheric carbon monoxide over an urban site in Southeast Asia

Identifieur interne : 000026 ( PascalFrancis/Corpus ); précédent : 000025; suivant : 000027

Variability in tropospheric carbon monoxide over an urban site in Southeast Asia

Auteurs : L. K. Sahu ; Varun Sheel ; M. Kajino ; P. Nedelec

Source :

Atmospheric environment : (1994) [ 1352-2310 ] ; 2013.

RBID : Pascal:13-0183647

Descripteurs français

Pascal (Inist)
- Troposphère, Monoxyde de carbone, Zone urbaine, Biomasse, Combustion, Distribution concentration, Profil vertical, Variation saisonnière, Rapport mélange, Variation interannuelle, Localisation source, Source pollution, Condition météorologique, Asie du sud est, Thaïlande, Rétro-trajectoire.

English descriptors

KwdEn :
- Atmospheric condition, Backward trajectory, Biomass, Carbon monoxide, Combustion, Concentration distribution, Interannual variation, Mixing ratio, Pollution source, Seasonal variation, Source localization, South east Asia, Thailand, Troposphere, Urban area, Vertical profile.

Abstract

This paper analyses MOZAIC (Measurements of Ozone aboard Airbus in-service aircraft) measurements of carbon monoxide (CO) profiles over Bangkok to discuss the seasonality in vertical distribution during year 2005-2006. The mixing ratios of CO were enhanced in the lower troposphere being highest in winter followed by summer and wet seasons. During all the seasons, the mixing ratio of CO decreased rapidly and remained low in the middle troposphere. At higher altitudes (6-12 km), CO shows enhanced values particularly during wet and early winter seasons. The strong seasonality in CO was caused by the seasonal shift in the patterns of the long-range transport and biomass burning (BB) in South and Southeast Asia (S-SE Asia). Flow of cleaner air and negligible BB resulted in the lowest mixing ratio of CO in the wet season. In addition to anthropogenic influence, the long-range transport and BB caused the higher CO in the winter and summer seasons, respectively. Despite extensive local BB activities in Thailand during the summer season, the moderate levels of CO were attributed to the dilution due to flow of cleaner marine from the Indian and Pacific Oceans. We have also compared the observations with the Model for Ozone And Related Chemical Tracers (MOZART) simulations. Mostly the observations lie between the MOZART-2 and MOZART-4 simulations as they underestimate and overestimate the observed CO, respectively. In the middle and upper troposphere, both the observed and simulated mixing ratios of CO during September-November of year 2006 were higher by 15-30 ppbv compared to the same period of year 2005. Our analysis indicates the impact of El Niño induced extensive BB in Indonesia during the year 2006.

Notice en format standard (ISO 2709)

Pour connaître la documentation sur le format Inist Standard.

A01	`01`	`1`		`@0 1352-2310`
A03		`1`		`@0 Atmos. environ. : (1994)`
A05				`@2 68`
A08	`01`	`1`	`ENG`	`@1 Variability in tropospheric carbon monoxide over an urban site in Southeast Asia`
A11	`01`	`1`		`@1 SAHU (L. K.)`
A11	`02`	`1`		`@1 SHEEL (Varun)`
A11	`03`	`1`		`@1 KAJINO (M.)`
A11	`04`	`1`		`@1 NEDELEC (P.)`
A14	`01`			`@1 Physical Research Laboratory (PRL), Navrangpura @2 Ahmedabad, Gujarat 380009 @3 IND @Z 1 aut. @Z 2 aut.`
A14	`02`			`@1 Meteorological Research Institute, Japan Meteorological Agency @2 Tsukuba @3 JPN @Z 3 aut.`
A14	`03`			`@1 Pacific Northwest National Laboratory @2 Richland, WA @3 USA @Z 3 aut.`
A14	`04`			`@1 Laboratoire d'Aérologie, CNRS, Observatoire Midi-Pyrénées, UMR 5560, 14 Avenue Edouard Belin @2 31400 Toulouse @3 FRA @Z 4 aut.`
A20				`@1 243-255`
A21				`@1 2013`
A23	`01`			`@0 ENG`
A43	`01`			`@1 INIST @2 8940B @5 354000506294510280`
A44				`@0 0000 @1 © 2013 INIST-CNRS. All rights reserved.`
A45				`@0 3/4 p.`
A47	`01`	`1`		`@0 13-0183647`
A60				`@1 P`
A61				`@0 A`
A64	`01`	`1`		`@0 Atmospheric environment : (1994)`
A66	`01`			`@0 GBR`
C01	`01`		`ENG`	@0 This paper analyses MOZAIC (Measurements of Ozone aboard Airbus in-service aircraft) measurements of carbon monoxide (CO) profiles over Bangkok to discuss the seasonality in vertical distribution during year 2005-2006. The mixing ratios of CO were enhanced in the lower troposphere being highest in winter followed by summer and wet seasons. During all the seasons, the mixing ratio of CO decreased rapidly and remained low in the middle troposphere. At higher altitudes (6-12 km), CO shows enhanced values particularly during wet and early winter seasons. The strong seasonality in CO was caused by the seasonal shift in the patterns of the long-range transport and biomass burning (BB) in South and Southeast Asia (S-SE Asia). Flow of cleaner air and negligible BB resulted in the lowest mixing ratio of CO in the wet season. In addition to anthropogenic influence, the long-range transport and BB caused the higher CO in the winter and summer seasons, respectively. Despite extensive local BB activities in Thailand during the summer season, the moderate levels of CO were attributed to the dilution due to flow of cleaner marine from the Indian and Pacific Oceans. We have also compared the observations with the Model for Ozone And Related Chemical Tracers (MOZART) simulations. Mostly the observations lie between the MOZART-2 and MOZART-4 simulations as they underestimate and overestimate the observed CO, respectively. In the middle and upper troposphere, both the observed and simulated mixing ratios of CO during September-November of year 2006 were higher by 15-30 ppbv compared to the same period of year 2005. Our analysis indicates the impact of El Niño induced extensive BB in Indonesia during the year 2006.
C02	`01`	`X`		`@0 001D16C02`
C03	`01`	`X`	`FRE`	`@0 Troposphère @5 01`
C03	`01`	`X`	`ENG`	`@0 Troposphere @5 01`
C03	`01`	`X`	`SPA`	`@0 Troposfera @5 01`
C03	`02`	`X`	`FRE`	`@0 Monoxyde de carbone @2 NK @2 FX @5 02`
C03	`02`	`X`	`ENG`	`@0 Carbon monoxide @2 NK @2 FX @5 02`
C03	`02`	`X`	`SPA`	`@0 Carbono monóxido @2 NK @2 FX @5 02`
C03	`03`	`X`	`FRE`	`@0 Zone urbaine @5 03`
C03	`03`	`X`	`ENG`	`@0 Urban area @5 03`
C03	`03`	`X`	`SPA`	`@0 Zona urbana @5 03`
C03	`04`	`X`	`FRE`	`@0 Biomasse @5 04`
C03	`04`	`X`	`ENG`	`@0 Biomass @5 04`
C03	`04`	`X`	`SPA`	`@0 Biomasa @5 04`
C03	`05`	`X`	`FRE`	`@0 Combustion @5 05`
C03	`05`	`X`	`ENG`	`@0 Combustion @5 05`
C03	`05`	`X`	`SPA`	`@0 Combustión @5 05`
C03	`06`	`X`	`FRE`	`@0 Distribution concentration @5 06`
C03	`06`	`X`	`ENG`	`@0 Concentration distribution @5 06`
C03	`06`	`X`	`SPA`	`@0 Distribución concentración @5 06`
C03	`07`	`X`	`FRE`	`@0 Profil vertical @5 07`
C03	`07`	`X`	`ENG`	`@0 Vertical profile @5 07`
C03	`07`	`X`	`SPA`	`@0 Perfil vertical @5 07`
C03	`08`	`X`	`FRE`	`@0 Variation saisonnière @5 08`
C03	`08`	`X`	`ENG`	`@0 Seasonal variation @5 08`
C03	`08`	`X`	`SPA`	`@0 Variación estacional @5 08`
C03	`09`	`X`	`FRE`	`@0 Rapport mélange @5 09`
C03	`09`	`X`	`ENG`	`@0 Mixing ratio @5 09`
C03	`09`	`X`	`SPA`	`@0 Relación mezcla @5 09`
C03	`10`	`X`	`FRE`	`@0 Variation interannuelle @5 10`
C03	`10`	`X`	`ENG`	`@0 Interannual variation @5 10`
C03	`10`	`X`	`SPA`	`@0 Variación interanual @5 10`
C03	`11`	`X`	`FRE`	`@0 Localisation source @5 11`
C03	`11`	`X`	`ENG`	`@0 Source localization @5 11`
C03	`11`	`X`	`SPA`	`@0 Localización fuente @5 11`
C03	`12`	`X`	`FRE`	`@0 Source pollution @5 12`
C03	`12`	`X`	`ENG`	`@0 Pollution source @5 12`
C03	`12`	`X`	`SPA`	`@0 Fuente polución @5 12`
C03	`13`	`X`	`FRE`	`@0 Condition météorologique @5 13`
C03	`13`	`X`	`ENG`	`@0 Atmospheric condition @5 13`
C03	`13`	`X`	`SPA`	`@0 Condición meteorológica @5 13`
C03	`14`	`X`	`FRE`	`@0 Asie du sud est @2 NG @5 31`
C03	`14`	`X`	`ENG`	`@0 South east Asia @2 NG @5 31`
C03	`14`	`X`	`SPA`	`@0 Asia del sureste @2 NG @5 31`
C03	`15`	`X`	`FRE`	`@0 Thaïlande @2 NG @5 32`
C03	`15`	`X`	`ENG`	`@0 Thailand @2 NG @5 32`
C03	`15`	`X`	`SPA`	`@0 Tailandia @2 NG @5 32`
C03	`16`	`X`	`FRE`	`@0 Rétro-trajectoire @4 CD @5 96`
C03	`16`	`X`	`ENG`	`@0 Backward trajectory @4 CD @5 96`
C03	`16`	`X`	`SPA`	`@0 Retro-trayectoria @4 CD @5 96`
C07	`01`	`X`	`FRE`	`@0 Asie @2 NG`
C07	`01`	`X`	`ENG`	`@0 Asia @2 NG`
C07	`01`	`X`	`SPA`	`@0 Asia @2 NG`
N21				`@1 168`

Format Inist (serveur)

NO :	PASCAL 13-0183647 INIST
ET :	Variability in tropospheric carbon monoxide over an urban site in Southeast Asia
AU :	SAHU (L. K.); SHEEL (Varun); KAJINO (M.); NEDELEC (P.)
AF :	Physical Research Laboratory (PRL), Navrangpura/Ahmedabad, Gujarat 380009/Inde (1 aut., 2 aut.); Meteorological Research Institute, Japan Meteorological Agency/Tsukuba/Japon (3 aut.); Pacific Northwest National Laboratory/Richland, WA/Etats-Unis (3 aut.); Laboratoire d'Aérologie, CNRS, Observatoire Midi-Pyrénées, UMR 5560, 14 Avenue Edouard Belin/31400 Toulouse/France (4 aut.)
DT :	Publication en série; Niveau analytique
SO :	Atmospheric environment : (1994); ISSN 1352-2310; Royaume-Uni; Da. 2013; Vol. 68; Pp. 243-255; Bibl. 3/4 p.
LA :	Anglais
EA :	This paper analyses MOZAIC (Measurements of Ozone aboard Airbus in-service aircraft) measurements of carbon monoxide (CO) profiles over Bangkok to discuss the seasonality in vertical distribution during year 2005-2006. The mixing ratios of CO were enhanced in the lower troposphere being highest in winter followed by summer and wet seasons. During all the seasons, the mixing ratio of CO decreased rapidly and remained low in the middle troposphere. At higher altitudes (6-12 km), CO shows enhanced values particularly during wet and early winter seasons. The strong seasonality in CO was caused by the seasonal shift in the patterns of the long-range transport and biomass burning (BB) in South and Southeast Asia (S-SE Asia). Flow of cleaner air and negligible BB resulted in the lowest mixing ratio of CO in the wet season. In addition to anthropogenic influence, the long-range transport and BB caused the higher CO in the winter and summer seasons, respectively. Despite extensive local BB activities in Thailand during the summer season, the moderate levels of CO were attributed to the dilution due to flow of cleaner marine from the Indian and Pacific Oceans. We have also compared the observations with the Model for Ozone And Related Chemical Tracers (MOZART) simulations. Mostly the observations lie between the MOZART-2 and MOZART-4 simulations as they underestimate and overestimate the observed CO, respectively. In the middle and upper troposphere, both the observed and simulated mixing ratios of CO during September-November of year 2006 were higher by 15-30 ppbv compared to the same period of year 2005. Our analysis indicates the impact of El Niño induced extensive BB in Indonesia during the year 2006.
CC :	001D16C02
FD :	Troposphère; Monoxyde de carbone; Zone urbaine; Biomasse; Combustion; Distribution concentration; Profil vertical; Variation saisonnière; Rapport mélange; Variation interannuelle; Localisation source; Source pollution; Condition météorologique; Asie du sud est; Thaïlande; Rétro-trajectoire
FG :	Asie
ED :	Troposphere; Carbon monoxide; Urban area; Biomass; Combustion; Concentration distribution; Vertical profile; Seasonal variation; Mixing ratio; Interannual variation; Source localization; Pollution source; Atmospheric condition; South east Asia; Thailand; Backward trajectory
EG :	Asia
SD :	Troposfera; Carbono monóxido; Zona urbana; Biomasa; Combustión; Distribución concentración; Perfil vertical; Variación estacional; Relación mezcla; Variación interanual; Localización fuente; Fuente polución; Condición meteorológica; Asia del sureste; Tailandia; Retro-trayectoria
LO :	INIST-8940B.354000506294510280
ID :	13-0183647

Links to Exploration step

Pascal:13-0183647

Le document en format XML

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<front><div type="abstract" xml:lang="en">This paper analyses MOZAIC (Measurements of Ozone aboard Airbus in-service aircraft) measurements of carbon monoxide (CO) profiles over Bangkok to discuss the seasonality in vertical distribution during year 2005-2006. The mixing ratios of CO were enhanced in the lower troposphere being highest in winter followed by summer and wet seasons. During all the seasons, the mixing ratio of CO decreased rapidly and remained low in the middle troposphere. At higher altitudes (6-12 km), CO shows enhanced values particularly during wet and early winter seasons. The strong seasonality in CO was caused by the seasonal shift in the patterns of the long-range transport and biomass burning (BB) in South and Southeast Asia (S-SE Asia). Flow of cleaner air and negligible BB resulted in the lowest mixing ratio of CO in the wet season. In addition to anthropogenic influence, the long-range transport and BB caused the higher CO in the winter and summer seasons, respectively. Despite extensive local BB activities in Thailand during the summer season, the moderate levels of CO were attributed to the dilution due to flow of cleaner marine from the Indian and Pacific Oceans. We have also compared the observations with the Model for Ozone And Related Chemical Tracers (MOZART) simulations. Mostly the observations lie between the MOZART-2 and MOZART-4 simulations as they underestimate and overestimate the observed CO, respectively. In the middle and upper troposphere, both the observed and simulated mixing ratios of CO during September-November of year 2006 were higher by 15-30 ppbv compared to the same period of year 2005. Our analysis indicates the impact of El Niño induced extensive BB in Indonesia during the year 2006.</div>
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<fC01 i1="01" l="ENG"><s0>This paper analyses MOZAIC (Measurements of Ozone aboard Airbus in-service aircraft) measurements of carbon monoxide (CO) profiles over Bangkok to discuss the seasonality in vertical distribution during year 2005-2006. The mixing ratios of CO were enhanced in the lower troposphere being highest in winter followed by summer and wet seasons. During all the seasons, the mixing ratio of CO decreased rapidly and remained low in the middle troposphere. At higher altitudes (6-12 km), CO shows enhanced values particularly during wet and early winter seasons. The strong seasonality in CO was caused by the seasonal shift in the patterns of the long-range transport and biomass burning (BB) in South and Southeast Asia (S-SE Asia). Flow of cleaner air and negligible BB resulted in the lowest mixing ratio of CO in the wet season. In addition to anthropogenic influence, the long-range transport and BB caused the higher CO in the winter and summer seasons, respectively. Despite extensive local BB activities in Thailand during the summer season, the moderate levels of CO were attributed to the dilution due to flow of cleaner marine from the Indian and Pacific Oceans. We have also compared the observations with the Model for Ozone And Related Chemical Tracers (MOZART) simulations. Mostly the observations lie between the MOZART-2 and MOZART-4 simulations as they underestimate and overestimate the observed CO, respectively. In the middle and upper troposphere, both the observed and simulated mixing ratios of CO during September-November of year 2006 were higher by 15-30 ppbv compared to the same period of year 2005. Our analysis indicates the impact of El Niño induced extensive BB in Indonesia during the year 2006.</s0>
</fC01>
<fC02 i1="01" i2="X"><s0>001D16C02</s0>
</fC02>
<fC03 i1="01" i2="X" l="FRE"><s0>Troposphère</s0>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="ENG"><s0>Troposphere</s0>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="SPA"><s0>Troposfera</s0>
<s5>01</s5>
</fC03>
<fC03 i1="02" i2="X" l="FRE"><s0>Monoxyde de carbone</s0>
<s2>NK</s2>
<s2>FX</s2>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="ENG"><s0>Carbon monoxide</s0>
<s2>NK</s2>
<s2>FX</s2>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="SPA"><s0>Carbono monóxido</s0>
<s2>NK</s2>
<s2>FX</s2>
<s5>02</s5>
</fC03>
<fC03 i1="03" i2="X" l="FRE"><s0>Zone urbaine</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="ENG"><s0>Urban area</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="SPA"><s0>Zona urbana</s0>
<s5>03</s5>
</fC03>
<fC03 i1="04" i2="X" l="FRE"><s0>Biomasse</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="ENG"><s0>Biomass</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="SPA"><s0>Biomasa</s0>
<s5>04</s5>
</fC03>
<fC03 i1="05" i2="X" l="FRE"><s0>Combustion</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="ENG"><s0>Combustion</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="SPA"><s0>Combustión</s0>
<s5>05</s5>
</fC03>
<fC03 i1="06" i2="X" l="FRE"><s0>Distribution concentration</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="ENG"><s0>Concentration distribution</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="SPA"><s0>Distribución concentración</s0>
<s5>06</s5>
</fC03>
<fC03 i1="07" i2="X" l="FRE"><s0>Profil vertical</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="ENG"><s0>Vertical profile</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="SPA"><s0>Perfil vertical</s0>
<s5>07</s5>
</fC03>
<fC03 i1="08" i2="X" l="FRE"><s0>Variation saisonnière</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="ENG"><s0>Seasonal variation</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="SPA"><s0>Variación estacional</s0>
<s5>08</s5>
</fC03>
<fC03 i1="09" i2="X" l="FRE"><s0>Rapport mélange</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="ENG"><s0>Mixing ratio</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="SPA"><s0>Relación mezcla</s0>
<s5>09</s5>
</fC03>
<fC03 i1="10" i2="X" l="FRE"><s0>Variation interannuelle</s0>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="X" l="ENG"><s0>Interannual variation</s0>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="X" l="SPA"><s0>Variación interanual</s0>
<s5>10</s5>
</fC03>
<fC03 i1="11" i2="X" l="FRE"><s0>Localisation source</s0>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="X" l="ENG"><s0>Source localization</s0>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="X" l="SPA"><s0>Localización fuente</s0>
<s5>11</s5>
</fC03>
<fC03 i1="12" i2="X" l="FRE"><s0>Source pollution</s0>
<s5>12</s5>
</fC03>
<fC03 i1="12" i2="X" l="ENG"><s0>Pollution source</s0>
<s5>12</s5>
</fC03>
<fC03 i1="12" i2="X" l="SPA"><s0>Fuente polución</s0>
<s5>12</s5>
</fC03>
<fC03 i1="13" i2="X" l="FRE"><s0>Condition météorologique</s0>
<s5>13</s5>
</fC03>
<fC03 i1="13" i2="X" l="ENG"><s0>Atmospheric condition</s0>
<s5>13</s5>
</fC03>
<fC03 i1="13" i2="X" l="SPA"><s0>Condición meteorológica</s0>
<s5>13</s5>
</fC03>
<fC03 i1="14" i2="X" l="FRE"><s0>Asie du sud est</s0>
<s2>NG</s2>
<s5>31</s5>
</fC03>
<fC03 i1="14" i2="X" l="ENG"><s0>South east Asia</s0>
<s2>NG</s2>
<s5>31</s5>
</fC03>
<fC03 i1="14" i2="X" l="SPA"><s0>Asia del sureste</s0>
<s2>NG</s2>
<s5>31</s5>
</fC03>
<fC03 i1="15" i2="X" l="FRE"><s0>Thaïlande</s0>
<s2>NG</s2>
<s5>32</s5>
</fC03>
<fC03 i1="15" i2="X" l="ENG"><s0>Thailand</s0>
<s2>NG</s2>
<s5>32</s5>
</fC03>
<fC03 i1="15" i2="X" l="SPA"><s0>Tailandia</s0>
<s2>NG</s2>
<s5>32</s5>
</fC03>
<fC03 i1="16" i2="X" l="FRE"><s0>Rétro-trajectoire</s0>
<s4>CD</s4>
<s5>96</s5>
</fC03>
<fC03 i1="16" i2="X" l="ENG"><s0>Backward trajectory</s0>
<s4>CD</s4>
<s5>96</s5>
</fC03>
<fC03 i1="16" i2="X" l="SPA"><s0>Retro-trayectoria</s0>
<s4>CD</s4>
<s5>96</s5>
</fC03>
<fC07 i1="01" i2="X" l="FRE"><s0>Asie</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="01" i2="X" l="ENG"><s0>Asia</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="01" i2="X" l="SPA"><s0>Asia</s0>
<s2>NG</s2>
</fC07>
<fN21><s1>168</s1>
</fN21>
</pA>
</standard>
<server><NO>PASCAL 13-0183647 INIST</NO>
<ET>Variability in tropospheric carbon monoxide over an urban site in Southeast Asia</ET>
<AU>SAHU (L. K.); SHEEL (Varun); KAJINO (M.); NEDELEC (P.)</AU>
<AF>Physical Research Laboratory (PRL), Navrangpura/Ahmedabad, Gujarat 380009/Inde (1 aut., 2 aut.); Meteorological Research Institute, Japan Meteorological Agency/Tsukuba/Japon (3 aut.); Pacific Northwest National Laboratory/Richland, WA/Etats-Unis (3 aut.); Laboratoire d'Aérologie, CNRS, Observatoire Midi-Pyrénées, UMR 5560, 14 Avenue Edouard Belin/31400 Toulouse/France (4 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Atmospheric environment : (1994); ISSN 1352-2310; Royaume-Uni; Da. 2013; Vol. 68; Pp. 243-255; Bibl. 3/4 p.</SO>
<LA>Anglais</LA>
<EA>This paper analyses MOZAIC (Measurements of Ozone aboard Airbus in-service aircraft) measurements of carbon monoxide (CO) profiles over Bangkok to discuss the seasonality in vertical distribution during year 2005-2006. The mixing ratios of CO were enhanced in the lower troposphere being highest in winter followed by summer and wet seasons. During all the seasons, the mixing ratio of CO decreased rapidly and remained low in the middle troposphere. At higher altitudes (6-12 km), CO shows enhanced values particularly during wet and early winter seasons. The strong seasonality in CO was caused by the seasonal shift in the patterns of the long-range transport and biomass burning (BB) in South and Southeast Asia (S-SE Asia). Flow of cleaner air and negligible BB resulted in the lowest mixing ratio of CO in the wet season. In addition to anthropogenic influence, the long-range transport and BB caused the higher CO in the winter and summer seasons, respectively. Despite extensive local BB activities in Thailand during the summer season, the moderate levels of CO were attributed to the dilution due to flow of cleaner marine from the Indian and Pacific Oceans. We have also compared the observations with the Model for Ozone And Related Chemical Tracers (MOZART) simulations. Mostly the observations lie between the MOZART-2 and MOZART-4 simulations as they underestimate and overestimate the observed CO, respectively. In the middle and upper troposphere, both the observed and simulated mixing ratios of CO during September-November of year 2006 were higher by 15-30 ppbv compared to the same period of year 2005. Our analysis indicates the impact of El Niño induced extensive BB in Indonesia during the year 2006.</EA>
<CC>001D16C02</CC>
<FD>Troposphère; Monoxyde de carbone; Zone urbaine; Biomasse; Combustion; Distribution concentration; Profil vertical; Variation saisonnière; Rapport mélange; Variation interannuelle; Localisation source; Source pollution; Condition météorologique; Asie du sud est; Thaïlande; Rétro-trajectoire</FD>
<FG>Asie</FG>
<ED>Troposphere; Carbon monoxide; Urban area; Biomass; Combustion; Concentration distribution; Vertical profile; Seasonal variation; Mixing ratio; Interannual variation; Source localization; Pollution source; Atmospheric condition; South east Asia; Thailand; Backward trajectory</ED>
<EG>Asia</EG>
<SD>Troposfera; Carbono monóxido; Zona urbana; Biomasa; Combustión; Distribución concentración; Perfil vertical; Variación estacional; Relación mezcla; Variación interanual; Localización fuente; Fuente polución; Condición meteorológica; Asia del sureste; Tailandia; Retro-trayectoria</SD>
<LO>INIST-8940B.354000506294510280</LO>
<ID>13-0183647</ID>
</server>
</inist>
</record>

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Variability in tropospheric carbon monoxide over an urban site in Southeast Asia

Variability in tropospheric carbon monoxide over an urban site in Southeast Asia

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