MozartV1, PascalFrancis, Corpus, bibRecord, 000040

Surface distributions of 03, CO and hydrocarbons over the Bay of Bengal and the Arabian Sea during pre-monsoon season

Identifieur interne : 000040 ( PascalFrancis/Corpus ); précédent : 000039; suivant : 000041

Surface distributions of 03, CO and hydrocarbons over the Bay of Bengal and the Arabian Sea during pre-monsoon season

Auteurs : S. Srivastava ; S. Lal ; S. Venkataramani ; S. Gupta ; V. Sheel

Source :

Atmospheric environment : (1994) [ 1352-2310 ] ; 2012.

RBID : Pascal:12-0408390

Descripteurs français

Pascal (Inist)
- Hydrocarbure, Monoxyde de carbone, Ozone, Phénomène transport, Pollution air, Rapport mélange, Distribution concentration, Répartition spatiale, Atmosphère marine, Golfe du Bengale, Mer d'Oman, Oxydant photochimique.

English descriptors

KwdEn :
- Air pollution, Arabian Sea, Bay of Bengal, Carbon monoxide, Concentration distribution, Hydrocarbon, Marine atmosphere, Mixing ratio, Ozone, Photochemical oxidants, Spatial distribution, Transport process.

Abstract

Mixing ratios of ozone (O₃), carbon monoxide (CO), methane (CH₄) and few light non methane hydrocarbons (NMHCs) were measured on board the ocean research vessel Sagar Kanya over the Bay of Bengal and the Arabian Sea during the spring of 2006 as a part of an Integrated Campaign for Aerosol, gases and Radiation Budget (ICARB). North-westerly winds prevailing during this period transport large amount of anthropogenic pollutants from the Indo-Gangetic Plain (IGP) to the northern part of Bay of Bengal. The south-westerly and north-westerly winds carried cleaner marine air having lower abundance of pollutants over the southern Bay of Bengal and Arabian Sea. Ozone, CH₄, CO, ethane and n-butane are found to be well correlated with each other over the northern Bay of Bengal indicating their common co-located sources. The latitudinal gradients of these species are found to be significant (O₃ ∼ 5.4 ppbv deg ^-1, CH4 ∼ 5.3 ppbv deg^-1, CO ∼ 10 ppbv deg^-1, ethane ∼ 93.2 pptv deg^-1 and n-butane ∼ 59.7 pptv deg ^-1) over this region. Surprisingly, and in contrast to over the Bay of Bengal, the mixing ratios of these trace gases over the Arabian Sea are found comparatively higher over the southern region than over the northern region leading to negative latitudinal gradients. The short lived species with oceanic sources like ethene and propene show large variability and higher mixing ratios over southern parts of both the marine regions. These observations are compared with previous measurements made over these marine regions and the results obtained from the 3D MOZART chemistry transport model. The present study shows that the two marine regions adjacent to the Indian subcontinent are completely different from the perspective of surface level distributions of these species.

Notice en format standard (ISO 2709)

Pour connaître la documentation sur le format Inist Standard.

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A03		`1`		`@0 Atmos. environ. : (1994)`
A05				`@2 47`
A08	`01`	`1`	`ENG`	`@1 Surface distributions of 0₃, CO and hydrocarbons over the Bay of Bengal and the Arabian Sea during pre-monsoon season`
A11	`01`	`1`		`@1 SRIVASTAVA (S.)`
A11	`02`	`1`		`@1 LAL (S.)`
A11	`03`	`1`		`@1 VENKATARAMANI (S.)`
A11	`04`	`1`		`@1 GUPTA (S.)`
A11	`05`	`1`		`@1 SHEEL (V.)`
A14	`01`			`@1 Physical Research Laboratory, Navrangpum @2 Ahmedabad-380009, Gujarat @3 IND @Z 1 aut. @Z 2 aut. @Z 3 aut. @Z 4 aut. @Z 5 aut.`
A20				`@1 459-467`
A21				`@1 2012`
A23	`01`			`@0 ENG`
A43	`01`			`@1 INIST @2 8940B @5 354000506744400520`
A44				`@0 0000 @1 © 2012 INIST-CNRS. All rights reserved.`
A45				`@0 3/4 p.`
A47	`01`	`1`		`@0 12-0408390`
A60				`@1 P`
A61				`@0 A`
A64	`01`	`1`		`@0 Atmospheric environment : (1994)`
A66	`01`			`@0 GBR`
C01	`01`		`ENG`	@0 Mixing ratios of ozone (O₃), carbon monoxide (CO), methane (CH₄) and few light non methane hydrocarbons (NMHCs) were measured on board the ocean research vessel Sagar Kanya over the Bay of Bengal and the Arabian Sea during the spring of 2006 as a part of an Integrated Campaign for Aerosol, gases and Radiation Budget (ICARB). North-westerly winds prevailing during this period transport large amount of anthropogenic pollutants from the Indo-Gangetic Plain (IGP) to the northern part of Bay of Bengal. The south-westerly and north-westerly winds carried cleaner marine air having lower abundance of pollutants over the southern Bay of Bengal and Arabian Sea. Ozone, CH₄, CO, ethane and n-butane are found to be well correlated with each other over the northern Bay of Bengal indicating their common co-located sources. The latitudinal gradients of these species are found to be significant (O₃ ∼ 5.4 ppbv deg ^-1, CH4 ∼ 5.3 ppbv deg^-1, CO ∼ 10 ppbv deg^-1, ethane ∼ 93.2 pptv deg^-1 and n-butane ∼ 59.7 pptv deg ^-1) over this region. Surprisingly, and in contrast to over the Bay of Bengal, the mixing ratios of these trace gases over the Arabian Sea are found comparatively higher over the southern region than over the northern region leading to negative latitudinal gradients. The short lived species with oceanic sources like ethene and propene show large variability and higher mixing ratios over southern parts of both the marine regions. These observations are compared with previous measurements made over these marine regions and the results obtained from the 3D MOZART chemistry transport model. The present study shows that the two marine regions adjacent to the Indian subcontinent are completely different from the perspective of surface level distributions of these species.
C02	`01`	`X`		`@0 001D16C02`
C03	`01`	`X`	`FRE`	`@0 Hydrocarbure @2 FX @5 01`
C03	`01`	`X`	`ENG`	`@0 Hydrocarbon @2 FX @5 01`
C03	`01`	`X`	`SPA`	`@0 Hidrocarburo @2 FX @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 Ozone @2 NK @2 FX @5 03`
C03	`03`	`X`	`ENG`	`@0 Ozone @2 NK @2 FX @5 03`
C03	`03`	`X`	`SPA`	`@0 Ozono @2 NK @2 FX @5 03`
C03	`04`	`X`	`FRE`	`@0 Phénomène transport @5 04`
C03	`04`	`X`	`ENG`	`@0 Transport process @5 04`
C03	`04`	`X`	`SPA`	`@0 Fenómeno transporte @5 04`
C03	`05`	`X`	`FRE`	`@0 Pollution air @5 05`
C03	`05`	`X`	`ENG`	`@0 Air pollution @5 05`
C03	`05`	`X`	`SPA`	`@0 Contaminación aire @5 05`
C03	`06`	`X`	`FRE`	`@0 Rapport mélange @5 06`
C03	`06`	`X`	`ENG`	`@0 Mixing ratio @5 06`
C03	`06`	`X`	`SPA`	`@0 Relación mezcla @5 06`
C03	`07`	`X`	`FRE`	`@0 Distribution concentration @5 07`
C03	`07`	`X`	`ENG`	`@0 Concentration distribution @5 07`
C03	`07`	`X`	`SPA`	`@0 Distribución concentración @5 07`
C03	`08`	`X`	`FRE`	`@0 Répartition spatiale @5 08`
C03	`08`	`X`	`ENG`	`@0 Spatial distribution @5 08`
C03	`08`	`X`	`SPA`	`@0 Distribución espacial @5 08`
C03	`09`	`X`	`FRE`	`@0 Atmosphère marine @5 09`
C03	`09`	`X`	`ENG`	`@0 Marine atmosphere @5 09`
C03	`09`	`X`	`SPA`	`@0 Atmósfera marina @5 09`
C03	`10`	`X`	`FRE`	`@0 Golfe du Bengale @2 NG @5 31`
C03	`10`	`X`	`ENG`	`@0 Bay of Bengal @2 NG @5 31`
C03	`10`	`X`	`SPA`	`@0 Golfo de Bengala @2 NG @5 31`
C03	`11`	`X`	`FRE`	`@0 Mer d'Oman @2 NG @5 32`
C03	`11`	`X`	`ENG`	`@0 Arabian Sea @2 NG @5 32`
C03	`11`	`X`	`SPA`	`@0 Mar de Oman @2 NG @5 32`
C03	`12`	`3`	`FRE`	`@0 Oxydant photochimique @5 35`
C03	`12`	`3`	`ENG`	`@0 Photochemical oxidants @5 35`
C07	`01`	`X`	`FRE`	`@0 Océan Indien @2 NG`
C07	`01`	`X`	`ENG`	`@0 Indian Ocean @2 NG`
C07	`01`	`X`	`SPA`	`@0 Océano Indico @2 NG`
C07	`02`	`X`	`FRE`	`@0 Composé organique @2 NA @5 43`
C07	`02`	`X`	`ENG`	`@0 Organic compounds @2 NA @5 43`
C07	`02`	`X`	`SPA`	`@0 Compuesto orgánico @2 NA @5 43`
N21				`@1 317`

Format Inist (serveur)

NO :	PASCAL 12-0408390 INIST
ET :	Surface distributions of 0₃, CO and hydrocarbons over the Bay of Bengal and the Arabian Sea during pre-monsoon season
AU :	SRIVASTAVA (S.); LAL (S.); VENKATARAMANI (S.); GUPTA (S.); SHEEL (V.)
AF :	Physical Research Laboratory, Navrangpum/Ahmedabad-380009, Gujarat/Inde (1 aut., 2 aut., 3 aut., 4 aut., 5 aut.)
DT :	Publication en série; Niveau analytique
SO :	Atmospheric environment : (1994); ISSN 1352-2310; Royaume-Uni; Da. 2012; Vol. 47; Pp. 459-467; Bibl. 3/4 p.
LA :	Anglais
EA :	Mixing ratios of ozone (O₃), carbon monoxide (CO), methane (CH₄) and few light non methane hydrocarbons (NMHCs) were measured on board the ocean research vessel Sagar Kanya over the Bay of Bengal and the Arabian Sea during the spring of 2006 as a part of an Integrated Campaign for Aerosol, gases and Radiation Budget (ICARB). North-westerly winds prevailing during this period transport large amount of anthropogenic pollutants from the Indo-Gangetic Plain (IGP) to the northern part of Bay of Bengal. The south-westerly and north-westerly winds carried cleaner marine air having lower abundance of pollutants over the southern Bay of Bengal and Arabian Sea. Ozone, CH₄, CO, ethane and n-butane are found to be well correlated with each other over the northern Bay of Bengal indicating their common co-located sources. The latitudinal gradients of these species are found to be significant (O₃ ∼ 5.4 ppbv deg ^-1, CH4 ∼ 5.3 ppbv deg^-1, CO ∼ 10 ppbv deg^-1, ethane ∼ 93.2 pptv deg^-1 and n-butane ∼ 59.7 pptv deg ^-1) over this region. Surprisingly, and in contrast to over the Bay of Bengal, the mixing ratios of these trace gases over the Arabian Sea are found comparatively higher over the southern region than over the northern region leading to negative latitudinal gradients. The short lived species with oceanic sources like ethene and propene show large variability and higher mixing ratios over southern parts of both the marine regions. These observations are compared with previous measurements made over these marine regions and the results obtained from the 3D MOZART chemistry transport model. The present study shows that the two marine regions adjacent to the Indian subcontinent are completely different from the perspective of surface level distributions of these species.
CC :	001D16C02
FD :	Hydrocarbure; Monoxyde de carbone; Ozone; Phénomène transport; Pollution air; Rapport mélange; Distribution concentration; Répartition spatiale; Atmosphère marine; Golfe du Bengale; Mer d'Oman; Oxydant photochimique
FG :	Océan Indien; Composé organique
ED :	Hydrocarbon; Carbon monoxide; Ozone; Transport process; Air pollution; Mixing ratio; Concentration distribution; Spatial distribution; Marine atmosphere; Bay of Bengal; Arabian Sea; Photochemical oxidants
EG :	Indian Ocean; Organic compounds
SD :	Hidrocarburo; Carbono monóxido; Ozono; Fenómeno transporte; Contaminación aire; Relación mezcla; Distribución concentración; Distribución espacial; Atmósfera marina; Golfo de Bengala; Mar de Oman
LO :	INIST-8940B.354000506744400520
ID :	12-0408390

Links to Exploration step

Pascal:12-0408390

Le document en format XML

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<front><div type="abstract" xml:lang="en">Mixing ratios of ozone (O<sub>3</sub>
), carbon monoxide (CO), methane (CH<sub>4</sub>
) and few light non methane hydrocarbons (NMHCs) were measured on board the ocean research vessel Sagar Kanya over the Bay of Bengal and the Arabian Sea during the spring of 2006 as a part of an Integrated Campaign for Aerosol, gases and Radiation Budget (ICARB). North-westerly winds prevailing during this period transport large amount of anthropogenic pollutants from the Indo-Gangetic Plain (IGP) to the northern part of Bay of Bengal. The south-westerly and north-westerly winds carried cleaner marine air having lower abundance of pollutants over the southern Bay of Bengal and Arabian Sea. Ozone, CH<sub>4</sub>
, CO, ethane and n-butane are found to be well correlated with each other over the northern Bay of Bengal indicating their common co-located sources. The latitudinal gradients of these species are found to be significant (O<sub>3</sub>
 ∼ 5.4 ppbv deg <sup>-1</sup>
, CH4 ∼ 5.3 ppbv deg<sup>-1</sup>
, CO ∼ 10 ppbv deg<sup>-1</sup>
, ethane ∼ 93.2 pptv deg<sup>-1</sup>
 and n-butane ∼ 59.7 pptv deg <sup>-1</sup>
) over this region. Surprisingly, and in contrast to over the Bay of Bengal, the mixing ratios of these trace gases over the Arabian Sea are found comparatively higher over the southern region than over the northern region leading to negative latitudinal gradients. The short lived species with oceanic sources like ethene and propene show large variability and higher mixing ratios over southern parts of both the marine regions. These observations are compared with previous measurements made over these marine regions and the results obtained from the 3D MOZART chemistry transport model. The present study shows that the two marine regions adjacent to the Indian subcontinent are completely different from the perspective of surface level distributions of these species.</div>
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<fC01 i1="01" l="ENG"><s0>Mixing ratios of ozone (O<sub>3</sub>
), carbon monoxide (CO), methane (CH<sub>4</sub>
) and few light non methane hydrocarbons (NMHCs) were measured on board the ocean research vessel Sagar Kanya over the Bay of Bengal and the Arabian Sea during the spring of 2006 as a part of an Integrated Campaign for Aerosol, gases and Radiation Budget (ICARB). North-westerly winds prevailing during this period transport large amount of anthropogenic pollutants from the Indo-Gangetic Plain (IGP) to the northern part of Bay of Bengal. The south-westerly and north-westerly winds carried cleaner marine air having lower abundance of pollutants over the southern Bay of Bengal and Arabian Sea. Ozone, CH<sub>4</sub>
, CO, ethane and n-butane are found to be well correlated with each other over the northern Bay of Bengal indicating their common co-located sources. The latitudinal gradients of these species are found to be significant (O<sub>3</sub>
 ∼ 5.4 ppbv deg <sup>-1</sup>
, CH4 ∼ 5.3 ppbv deg<sup>-1</sup>
, CO ∼ 10 ppbv deg<sup>-1</sup>
, ethane ∼ 93.2 pptv deg<sup>-1</sup>
 and n-butane ∼ 59.7 pptv deg <sup>-1</sup>
) over this region. Surprisingly, and in contrast to over the Bay of Bengal, the mixing ratios of these trace gases over the Arabian Sea are found comparatively higher over the southern region than over the northern region leading to negative latitudinal gradients. The short lived species with oceanic sources like ethene and propene show large variability and higher mixing ratios over southern parts of both the marine regions. These observations are compared with previous measurements made over these marine regions and the results obtained from the 3D MOZART chemistry transport model. The present study shows that the two marine regions adjacent to the Indian subcontinent are completely different from the perspective of surface level distributions of these species.</s0>
</fC01>
<fC02 i1="01" i2="X"><s0>001D16C02</s0>
</fC02>
<fC03 i1="01" i2="X" l="FRE"><s0>Hydrocarbure</s0>
<s2>FX</s2>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="ENG"><s0>Hydrocarbon</s0>
<s2>FX</s2>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="SPA"><s0>Hidrocarburo</s0>
<s2>FX</s2>
<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>Ozone</s0>
<s2>NK</s2>
<s2>FX</s2>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="ENG"><s0>Ozone</s0>
<s2>NK</s2>
<s2>FX</s2>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="SPA"><s0>Ozono</s0>
<s2>NK</s2>
<s2>FX</s2>
<s5>03</s5>
</fC03>
<fC03 i1="04" i2="X" l="FRE"><s0>Phénomène transport</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="ENG"><s0>Transport process</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="SPA"><s0>Fenómeno transporte</s0>
<s5>04</s5>
</fC03>
<fC03 i1="05" i2="X" l="FRE"><s0>Pollution air</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="ENG"><s0>Air pollution</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="SPA"><s0>Contaminación aire</s0>
<s5>05</s5>
</fC03>
<fC03 i1="06" i2="X" l="FRE"><s0>Rapport mélange</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="ENG"><s0>Mixing ratio</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="SPA"><s0>Relación mezcla</s0>
<s5>06</s5>
</fC03>
<fC03 i1="07" i2="X" l="FRE"><s0>Distribution concentration</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="ENG"><s0>Concentration distribution</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="SPA"><s0>Distribución concentración</s0>
<s5>07</s5>
</fC03>
<fC03 i1="08" i2="X" l="FRE"><s0>Répartition spatiale</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="ENG"><s0>Spatial distribution</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="SPA"><s0>Distribución espacial</s0>
<s5>08</s5>
</fC03>
<fC03 i1="09" i2="X" l="FRE"><s0>Atmosphère marine</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="ENG"><s0>Marine atmosphere</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="SPA"><s0>Atmósfera marina</s0>
<s5>09</s5>
</fC03>
<fC03 i1="10" i2="X" l="FRE"><s0>Golfe du Bengale</s0>
<s2>NG</s2>
<s5>31</s5>
</fC03>
<fC03 i1="10" i2="X" l="ENG"><s0>Bay of Bengal</s0>
<s2>NG</s2>
<s5>31</s5>
</fC03>
<fC03 i1="10" i2="X" l="SPA"><s0>Golfo de Bengala</s0>
<s2>NG</s2>
<s5>31</s5>
</fC03>
<fC03 i1="11" i2="X" l="FRE"><s0>Mer d'Oman</s0>
<s2>NG</s2>
<s5>32</s5>
</fC03>
<fC03 i1="11" i2="X" l="ENG"><s0>Arabian Sea</s0>
<s2>NG</s2>
<s5>32</s5>
</fC03>
<fC03 i1="11" i2="X" l="SPA"><s0>Mar de Oman</s0>
<s2>NG</s2>
<s5>32</s5>
</fC03>
<fC03 i1="12" i2="3" l="FRE"><s0>Oxydant photochimique</s0>
<s5>35</s5>
</fC03>
<fC03 i1="12" i2="3" l="ENG"><s0>Photochemical oxidants</s0>
<s5>35</s5>
</fC03>
<fC07 i1="01" i2="X" l="FRE"><s0>Océan Indien</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="01" i2="X" l="ENG"><s0>Indian Ocean</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="01" i2="X" l="SPA"><s0>Océano Indico</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="02" i2="X" l="FRE"><s0>Composé organique</s0>
<s2>NA</s2>
<s5>43</s5>
</fC07>
<fC07 i1="02" i2="X" l="ENG"><s0>Organic compounds</s0>
<s2>NA</s2>
<s5>43</s5>
</fC07>
<fC07 i1="02" i2="X" l="SPA"><s0>Compuesto orgánico</s0>
<s2>NA</s2>
<s5>43</s5>
</fC07>
<fN21><s1>317</s1>
</fN21>
</pA>
</standard>
<server><NO>PASCAL 12-0408390 INIST</NO>
<ET>Surface distributions of 0<sub>3</sub>
, CO and hydrocarbons over the Bay of Bengal and the Arabian Sea during pre-monsoon season</ET>
<AU>SRIVASTAVA (S.); LAL (S.); VENKATARAMANI (S.); GUPTA (S.); SHEEL (V.)</AU>
<AF>Physical Research Laboratory, Navrangpum/Ahmedabad-380009, Gujarat/Inde (1 aut., 2 aut., 3 aut., 4 aut., 5 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Atmospheric environment : (1994); ISSN 1352-2310; Royaume-Uni; Da. 2012; Vol. 47; Pp. 459-467; Bibl. 3/4 p.</SO>
<LA>Anglais</LA>
<EA>Mixing ratios of ozone (O<sub>3</sub>
), carbon monoxide (CO), methane (CH<sub>4</sub>
) and few light non methane hydrocarbons (NMHCs) were measured on board the ocean research vessel Sagar Kanya over the Bay of Bengal and the Arabian Sea during the spring of 2006 as a part of an Integrated Campaign for Aerosol, gases and Radiation Budget (ICARB). North-westerly winds prevailing during this period transport large amount of anthropogenic pollutants from the Indo-Gangetic Plain (IGP) to the northern part of Bay of Bengal. The south-westerly and north-westerly winds carried cleaner marine air having lower abundance of pollutants over the southern Bay of Bengal and Arabian Sea. Ozone, CH<sub>4</sub>
, CO, ethane and n-butane are found to be well correlated with each other over the northern Bay of Bengal indicating their common co-located sources. The latitudinal gradients of these species are found to be significant (O<sub>3</sub>
 ∼ 5.4 ppbv deg <sup>-1</sup>
, CH4 ∼ 5.3 ppbv deg<sup>-1</sup>
, CO ∼ 10 ppbv deg<sup>-1</sup>
, ethane ∼ 93.2 pptv deg<sup>-1</sup>
 and n-butane ∼ 59.7 pptv deg <sup>-1</sup>
) over this region. Surprisingly, and in contrast to over the Bay of Bengal, the mixing ratios of these trace gases over the Arabian Sea are found comparatively higher over the southern region than over the northern region leading to negative latitudinal gradients. The short lived species with oceanic sources like ethene and propene show large variability and higher mixing ratios over southern parts of both the marine regions. These observations are compared with previous measurements made over these marine regions and the results obtained from the 3D MOZART chemistry transport model. The present study shows that the two marine regions adjacent to the Indian subcontinent are completely different from the perspective of surface level distributions of these species.</EA>
<CC>001D16C02</CC>
<FD>Hydrocarbure; Monoxyde de carbone; Ozone; Phénomène transport; Pollution air; Rapport mélange; Distribution concentration; Répartition spatiale; Atmosphère marine; Golfe du Bengale; Mer d'Oman; Oxydant photochimique</FD>
<FG>Océan Indien; Composé organique</FG>
<ED>Hydrocarbon; Carbon monoxide; Ozone; Transport process; Air pollution; Mixing ratio; Concentration distribution; Spatial distribution; Marine atmosphere; Bay of Bengal; Arabian Sea; Photochemical oxidants</ED>
<EG>Indian Ocean; Organic compounds</EG>
<SD>Hidrocarburo; Carbono monóxido; Ozono; Fenómeno transporte; Contaminación aire; Relación mezcla; Distribución concentración; Distribución espacial; Atmósfera marina; Golfo de Bengala; Mar de Oman</SD>
<LO>INIST-8940B.354000506744400520</LO>
<ID>12-0408390</ID>
</server>
</inist>
</record>

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Surface distributions of 03, CO and hydrocarbons over the Bay of Bengal and the Arabian Sea during pre-monsoon season

Surface distributions of 03, CO and hydrocarbons over the Bay of Bengal and the Arabian Sea during pre-monsoon season

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