Seasonal variability of ozone mixing ratios and budgets in the tropical southern Pacific: A GCTM perspective
Identifieur interne : 000020 ( Istex/Corpus ); précédent : 000019; suivant : 000021Seasonal variability of ozone mixing ratios and budgets in the tropical southern Pacific: A GCTM perspective
Auteurs : C. Wei ; V. R. Kotamarthi ; O. J. Ogunsola ; L. W. Horowitz ; S. Walters ; D. J. Wuebbles ; M. A. Avery ; D. R. Blake ; E. V. Browell ; G. W. SachseSource :
- Journal of Geophysical Research: Atmospheres [ 0148-0227 ] ; 2002-01-30.
Abstract
Significant seasonal variations in the concentrations of several trace gases were observed in the southern tropical Pacific during the Pacific Exploratory Mission (PEM) TROPICS‐A (PT‐A, September/October 1996) and PEM TROPICS‐B (PT‐B, March/April 1999) campaigns. The objective of this study is to evaluate the relationship between the measured and modeled seasonal variabilities through comparisons of these observations with model calculations. A three‐dimensional (3‐D) global‐scale chemical transport model was employed to (1) evaluate the seasonal variations in ozone and CO mixing ratios; (2) calculate an ozone budget and identify its controlling factors; (3) evaluate the effectiveness of atmospheric transport barriers in the model, such as the Intertropical Convergence Zone (ITCZ); and (4) test the sensitivity of ozone over the tropical south Pacific to biomass‐burning emissions. The model reproduces the main features of the observed seasonal variation in ozone and CO. According to the model calculation, the ozone burden during the PT‐A was larger due to the transport of ozone into the central pacific middle troposphere from the west, whereas a net outflow of ozone from this region to the east resulted in a reduction of ozone burden during the PT‐B period. Transport of ozone from the Northern Hemisphere into this region was found to be much larger during the PT‐B period compared with the PT‐A period. The in situ production and loss of ozone calculated in the model agreed with that derived from measurements. The gradients in the model for selected trace gases across the ITCZ were shown to be qualitatively similar to measurements.
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DOI: 10.1029/2001JD000772
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The objective of this study is to evaluate the relationship between the measured and modeled seasonal variabilities through comparisons of these observations with model calculations. A three‐dimensional (3‐D) global‐scale chemical transport model was employed to (1) evaluate the seasonal variations in ozone and CO mixing ratios; (2) calculate an ozone budget and identify its controlling factors; (3) evaluate the effectiveness of atmospheric transport barriers in the model, such as the Intertropical Convergence Zone (ITCZ); and (4) test the sensitivity of ozone over the tropical south Pacific to biomass‐burning emissions. The model reproduces the main features of the observed seasonal variation in ozone and CO. According to the model calculation, the ozone burden during the PT‐A was larger due to the transport of ozone into the central pacific middle troposphere from the west, whereas a net outflow of ozone from this region to the east resulted in a reduction of ozone burden during the PT‐B period. Transport of ozone from the Northern Hemisphere into this region was found to be much larger during the PT‐B period compared with the PT‐A period. The in situ production and loss of ozone calculated in the model agreed with that derived from measurements. The gradients in the model for selected trace gases across the ITCZ were shown to be qualitatively similar to measurements.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>C.‐F. Wei</name><affiliations><json:string>Department of Atmospheric Sciences, University of Illinois, Illinois, Urbana‐Champaign, USA</json:string></affiliations></json:item><json:item><name>V. R. 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Blake</name><affiliations><json:string>University of California‐Irvine, California, Irvine, USA</json:string></affiliations></json:item><json:item><name>E. V. Browell</name><affiliations><json:string>NASA‐Langley Research Center, Virginia, Hampton, USA</json:string></affiliations></json:item><json:item><name>G. W. Sachse</name><affiliations><json:string>NASA‐Langley Research Center, Virginia, Hampton, USA</json:string></affiliations></json:item></author><language><json:string>eng</json:string></language><abstract>Significant seasonal variations in the concentrations of several trace gases were observed in the southern tropical Pacific during the Pacific Exploratory Mission (PEM) TROPICS‐A (PT‐A, September/October 1996) and PEM TROPICS‐B (PT‐B, March/April 1999) campaigns. The objective of this study is to evaluate the relationship between the measured and modeled seasonal variabilities through comparisons of these observations with model calculations. A three‐dimensional (3‐D) global‐scale chemical transport model was employed to (1) evaluate the seasonal variations in ozone and CO mixing ratios; (2) calculate an ozone budget and identify its controlling factors; (3) evaluate the effectiveness of atmospheric transport barriers in the model, such as the Intertropical Convergence Zone (ITCZ); and (4) test the sensitivity of ozone over the tropical south Pacific to biomass‐burning emissions. The model reproduces the main features of the observed seasonal variation in ozone and CO. According to the model calculation, the ozone burden during the PT‐A was larger due to the transport of ozone into the central pacific middle troposphere from the west, whereas a net outflow of ozone from this region to the east resulted in a reduction of ozone burden during the PT‐B period. Transport of ozone from the Northern Hemisphere into this region was found to be much larger during the PT‐B period compared with the PT‐A period. The in situ production and loss of ozone calculated in the model agreed with that derived from measurements. 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The objective of this study is to evaluate the relationship between the measured and modeled seasonal variabilities through comparisons of these observations with model calculations. A three‐dimensional (3‐D) global‐scale chemical transport model was employed to (1) evaluate the seasonal variations in ozone and CO mixing ratios; (2) calculate an ozone budget and identify its controlling factors; (3) evaluate the effectiveness of atmospheric transport barriers in the model, such as the Intertropical Convergence Zone (ITCZ); and (4) test the sensitivity of ozone over the tropical south Pacific to biomass‐burning emissions. The model reproduces the main features of the observed seasonal variation in ozone and CO. According to the model calculation, the ozone burden during the PT‐A was larger due to the transport of ozone into the central pacific middle troposphere from the west, whereas a net outflow of ozone from this region to the east resulted in a reduction of ozone burden during the PT‐B period. Transport of ozone from the Northern Hemisphere into this region was found to be much larger during the PT‐B period compared with the PT‐A period. The in situ production and loss of ozone calculated in the model agreed with that derived from measurements. 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R.</givenNames> <familyName>Kotamarthi</familyName></author>, <author><givenNames>O. J.</givenNames> <familyName>Ogunsola</familyName></author>, <author><givenNames>L. W.</givenNames> <familyName>Horowitz</familyName></author>, <author><givenNames>S.</givenNames> <familyName>Walters</familyName></author>, <author><givenNames>D. J.</givenNames> <familyName>Wuebbles</familyName></author>, <author><givenNames>M. A.</givenNames> <familyName>Avery</familyName></author>, <author><givenNames>D. R.</givenNames> <familyName>Blake</familyName></author>, <author><givenNames>E. V.</givenNames> <familyName>Browell</familyName></author>, and <author><givenNames>G. W.</givenNames> <familyName>Sachse</familyName></author>, <articleTitle>Seasonal variability of ozone mixing ratios and budgets in the tropical Southern Pacific: A GCTM perspective</articleTitle>, <journalTitle>J. Geophys. Res.</journalTitle>, <vol>107</vol>, 8235, doi:<accessionId ref="info:doi/10.1029/2001JD000772">10.1029/2001JD000772</accessionId>, <pubYear year="2002">2002</pubYear>. [printed 108(<issue>D2</issue>), 2003]</citation></selfCitationGroup><linkGroup><link type="toTypesetVersion" href="file:JGRD.JGRD9016.pdf"></link></linkGroup></publicationMeta><contentMeta><countGroup><count type="figureTotal" number="14"></count><count type="tableTotal" number="3"></count></countGroup><titleGroup><title type="main">Seasonal variability of ozone mixing ratios and budgets in the tropical southern Pacific: A GCTM perspective</title><title type="short">O<sub>3</sub> MIXING RATIOS AND BUDGETS IN THE TROPICAL SOUTHERN PACIFIC</title><title type="shortAuthors">Wei <i>et al</i>.</title></titleGroup><creators><creator creatorRole="author" xml:id="jgrd9016-cr-0001" affiliationRef="#jgrd9016-aff-0001"><personName><givenNames>C.‐F.</givenNames> <familyName>Wei</familyName></personName></creator><creator creatorRole="author" xml:id="jgrd9016-cr-0002" affiliationRef="#jgrd9016-aff-0002"><personName><givenNames>V. R.</givenNames> <familyName>Kotamarthi</familyName></personName></creator><creator creatorRole="author" xml:id="jgrd9016-cr-0003" affiliationRef="#jgrd9016-aff-0001"><personName><givenNames>O. J.</givenNames> <familyName>Ogunsola</familyName></personName></creator><creator creatorRole="author" xml:id="jgrd9016-cr-0004" affiliationRef="#jgrd9016-aff-0003"><personName><givenNames>L. W.</givenNames> <familyName>Horowitz</familyName></personName></creator><creator creatorRole="author" xml:id="jgrd9016-cr-0005" affiliationRef="#jgrd9016-aff-0004"><personName><givenNames>S.</givenNames> <familyName>Walters</familyName></personName></creator><creator creatorRole="author" xml:id="jgrd9016-cr-0006" affiliationRef="#jgrd9016-aff-0001"><personName><givenNames>D. J.</givenNames> <familyName>Wuebbles</familyName></personName></creator><creator creatorRole="author" xml:id="jgrd9016-cr-0007" affiliationRef="#jgrd9016-aff-0005"><personName><givenNames>M. A.</givenNames> <familyName>Avery</familyName></personName></creator><creator creatorRole="author" xml:id="jgrd9016-cr-0008" affiliationRef="#jgrd9016-aff-0006"><personName><givenNames>D. R.</givenNames> <familyName>Blake</familyName></personName></creator><creator creatorRole="author" xml:id="jgrd9016-cr-0009" affiliationRef="#jgrd9016-aff-0005"><personName><givenNames>E. V.</givenNames> <familyName>Browell</familyName></personName></creator><creator creatorRole="author" xml:id="jgrd9016-cr-0010" affiliationRef="#jgrd9016-aff-0005"><personName><givenNames>G. W.</givenNames> <familyName>Sachse</familyName></personName></creator></creators><affiliationGroup><affiliation countryCode="US" type="organization" xml:id="jgrd9016-aff-0001"><orgDiv>Department of Atmospheric Sciences</orgDiv><orgName>University of Illinois</orgName><address><city>Urbana‐Champaign</city><countryPart>Illinois</countryPart><country>USA</country></address></affiliation><affiliation countryCode="US" type="organization" xml:id="jgrd9016-aff-0002"><orgName>Argonne National Laboratory</orgName><address><city>Argonne</city><countryPart>Illinois</countryPart><country>USA</country></address></affiliation><affiliation countryCode="US" type="organization" xml:id="jgrd9016-aff-0003"><orgName>GFDL</orgName><address><city>Princeton</city><countryPart>New Jersey</countryPart><country>USA</country></address></affiliation><affiliation countryCode="US" type="organization" xml:id="jgrd9016-aff-0004"><orgName>NCAR</orgName><address><city>Boulder</city><countryPart>Colorado</countryPart><country>USA</country></address></affiliation><affiliation countryCode="US" type="organization" xml:id="jgrd9016-aff-0005"><orgName>NASA‐Langley Research Center</orgName><address><city>Hampton</city><countryPart>Virginia</countryPart><country>USA</country></address></affiliation><affiliation countryCode="US" type="organization" xml:id="jgrd9016-aff-0006"><orgName>University of California‐Irvine</orgName><address><city>Irvine</city><countryPart>California</countryPart><country>USA</country></address></affiliation></affiliationGroup><abstractGroup><abstract type="main"><p xml:id="jgrd9016-para-0001" label="1">Significant seasonal variations in the concentrations of several trace gases were observed in the southern tropical Pacific during the Pacific Exploratory Mission (PEM) TROPICS‐A (PT‐A, September/October 1996) and PEM TROPICS‐B (PT‐B, March/April 1999) campaigns. The objective of this study is to evaluate the relationship between the measured and modeled seasonal variabilities through comparisons of these observations with model calculations. A three‐dimensional (3‐D) global‐scale chemical transport model was employed to (1) evaluate the seasonal variations in ozone and CO mixing ratios; (2) calculate an ozone budget and identify its controlling factors; (3) evaluate the effectiveness of atmospheric transport barriers in the model, such as the Intertropical Convergence Zone (ITCZ); and (4) test the sensitivity of ozone over the tropical south Pacific to biomass‐burning emissions. The model reproduces the main features of the observed seasonal variation in ozone and CO. According to the model calculation, the ozone burden during the PT‐A was larger due to the transport of ozone into the central pacific middle troposphere from the west, whereas a net outflow of ozone from this region to the east resulted in a reduction of ozone burden during the PT‐B period. Transport of ozone from the Northern Hemisphere into this region was found to be much larger during the PT‐B period compared with the PT‐A period. The in situ production and loss of ozone calculated in the model agreed with that derived from measurements. The gradients in the model for selected trace gases across the ITCZ were shown to be qualitatively similar to measurements.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Seasonal variability of ozone mixing ratios and budgets in the tropical southern Pacific: A GCTM perspective</title></titleInfo><titleInfo type="abbreviated"><title>O3 MIXING RATIOS AND BUDGETS IN THE TROPICAL SOUTHERN PACIFIC</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Seasonal variability of ozone mixing ratios and budgets in the tropical southern Pacific: A GCTM perspective</title></titleInfo><name type="personal"><namePart type="given">C.‐F.</namePart><namePart type="family">Wei</namePart><affiliation>Department of Atmospheric Sciences, University of Illinois, Illinois, Urbana‐Champaign, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">V. R.</namePart><namePart type="family">Kotamarthi</namePart><affiliation>Argonne National Laboratory, Illinois, Argonne, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">O. J.</namePart><namePart type="family">Ogunsola</namePart><affiliation>Department of Atmospheric Sciences, University of Illinois, Illinois, Urbana‐Champaign, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">L. W.</namePart><namePart type="family">Horowitz</namePart><affiliation>GFDL, New Jersey, Princeton, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">S.</namePart><namePart type="family">Walters</namePart><affiliation>NCAR, Colorado, Boulder, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">D. J.</namePart><namePart type="family">Wuebbles</namePart><affiliation>Department of Atmospheric Sciences, University of Illinois, Illinois, Urbana‐Champaign, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M. A.</namePart><namePart type="family">Avery</namePart><affiliation>NASA‐Langley Research Center, Virginia, Hampton, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">D. R.</namePart><namePart type="family">Blake</namePart><affiliation>University of California‐Irvine, California, Irvine, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">E. V.</namePart><namePart type="family">Browell</namePart><affiliation>NASA‐Langley Research Center, Virginia, Hampton, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">G. W.</namePart><namePart type="family">Sachse</namePart><affiliation>NASA‐Langley Research Center, Virginia, Hampton, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article">article</genre><originInfo><publisher>Blackwell Publishing Ltd</publisher><dateIssued encoding="w3cdtf">2002-01-30</dateIssued><dateCaptured encoding="w3cdtf">2001-04-25</dateCaptured><dateValid encoding="w3cdtf">2002-01-31</dateValid><edition>Wei, C.‐F., V. R. Kotamarthi, O. J. Ogunsola, L. W. Horowitz, S. Walters, D. J. Wuebbles, M. A. Avery, D. R. Blake, E. V. Browell, and G. W. Sachse, Seasonal variability of ozone mixing ratios and budgets in the tropical Southern Pacific: A GCTM perspective, J. Geophys. Res., 107, 8235, doi:10.1029/2001JD000772, 2002. [printed 108(D2), 2003]</edition><copyrightDate encoding="w3cdtf">2002</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="figures">14</extent><extent unit="tables">3</extent></physicalDescription><abstract>Significant seasonal variations in the concentrations of several trace gases were observed in the southern tropical Pacific during the Pacific Exploratory Mission (PEM) TROPICS‐A (PT‐A, September/October 1996) and PEM TROPICS‐B (PT‐B, March/April 1999) campaigns. The objective of this study is to evaluate the relationship between the measured and modeled seasonal variabilities through comparisons of these observations with model calculations. A three‐dimensional (3‐D) global‐scale chemical transport model was employed to (1) evaluate the seasonal variations in ozone and CO mixing ratios; (2) calculate an ozone budget and identify its controlling factors; (3) evaluate the effectiveness of atmospheric transport barriers in the model, such as the Intertropical Convergence Zone (ITCZ); and (4) test the sensitivity of ozone over the tropical south Pacific to biomass‐burning emissions. The model reproduces the main features of the observed seasonal variation in ozone and CO. According to the model calculation, the ozone burden during the PT‐A was larger due to the transport of ozone into the central pacific middle troposphere from the west, whereas a net outflow of ozone from this region to the east resulted in a reduction of ozone burden during the PT‐B period. Transport of ozone from the Northern Hemisphere into this region was found to be much larger during the PT‐B period compared with the PT‐A period. The in situ production and loss of ozone calculated in the model agreed with that derived from measurements. The gradients in the model for selected trace gases across the ITCZ were shown to be qualitatively similar to measurements.</abstract><relatedItem type="host"><titleInfo><title>Journal of Geophysical Research: Atmospheres</title></titleInfo><titleInfo type="abbreviated"><title>J. Geophys. Res.</title></titleInfo><subject><genre>Index Terms</genre><topic authorityURI="http://psi.agu.org/specialSection/PEMTB2">Pacific Exploratory Mission in the Tropics ‐ B (PEMTROPICS‐B) Part 2</topic><topic authorityURI="http://psi.agu.org/subset/ACH">Composition and Chemistry</topic><topic authorityURI="http://psi.agu.org/taxonomy5/0300">ATMOSPHERIC COMPOSITION AND STRUCTURE</topic><topic authorityURI="http://psi.agu.org/taxonomy5/0368">Troposphere: constituent transport and chemistry</topic></subject><subject><genre>article category</genre><topic>Composition and Chemistry</topic></subject><identifier type="ISSN">0148-0227</identifier><identifier type="eISSN">2156-2202</identifier><identifier type="DOI">10.1002/(ISSN)2156-2202d</identifier><identifier type="CODEN">JGREA2</identifier><identifier type="PublisherID">JGRD</identifier><part><date>2002</date><detail type="volume"><caption>vol.</caption><number>107</number></detail><detail type="issue"><caption>no.</caption><number>D2</number></detail><extent unit="pages"><start>PEM 7-1</start><end>PEM 7-23</end><total>23</total></extent></part></relatedItem><identifier type="istex">92EF072E071E3CB13127BDEDBC82827548443C39</identifier><identifier type="DOI">10.1029/2001JD000772</identifier><identifier type="ArticleID">2001JD000772</identifier><accessCondition type="use and reproduction" contentType="copyright">Copyright 2002 by the American Geophysical Union.</accessCondition><recordInfo><recordContentSource>WILEY</recordContentSource></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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