A set of diagnostics for evaluating chemistry‐climate models in the extratropical tropopause region
Identifieur interne : 000038 ( Istex/Corpus ); précédent : 000037; suivant : 000039A set of diagnostics for evaluating chemistry‐climate models in the extratropical tropopause region
Auteurs : L. L. Pan ; J. C. Wei ; D. E. Kinnison ; R. R. Garcia ; D. J. Wuebbles ; G. P. BrasseurSource :
- Journal of Geophysical Research: Atmospheres [ 0148-0227 ] ; 2007-05-16.
Abstract
Three related diagnostics are used to evaluate the representation of chemical transport processes in the extratropical upper troposphere and lower stratosphere (UTLS) by chemistry‐transport and chemistry‐climate models. The diagnostics are based on in situ observations of ozone, carbon monoxide, water vapor profiles (obtained on board the NASA ER‐2 research aircraft, near 65°N and during 1997), and their interrelationships in the UTLS. The first diagnostic compares the observed and modeled UTLS trace gas profiles in a relative altitude coordinate. The second one compares the observed and modeled UTLS tracer relationships. The third one compares the observed and modeled thickness of the tropopause transition layer. Together, they characterize the model's ability to reproduce the observed chemical distribution in the UTLS region and chemical transition across the extratropical tropopause. These are key indicators of whether the contributions of dynamics and chemistry to this region are correctly represented in the models. These diagnostics are used to evaluate the performance of an NCAR chemistry‐transport model (CTM), MOZART‐3, and a chemistry‐climate model (CCM), WACCM3. Results from four model runs with different meteorological fields and grid resolution are examined. Overall, the NCAR models show qualitative agreement with the observations in the location of the chemical transition across the extratropical tropopause. Quantitatively, there are significant differences between the modeled and the observed chemical distributions. Both the meteorological field and grid resolutions are contributing factors to the differences.
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DOI: 10.1029/2006JD007792
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Pan</name><affiliation><mods:affiliation>E-mail: liwen@ucar.edu</mods:affiliation></affiliation><affiliation><mods:affiliation>Atmospheric Chemistry Division, National Center for Atmospheric Research, Colorado, Boulder, USA</mods:affiliation></affiliation></author><author><name sortKey="Wei, J C" sort="Wei, J C" uniqKey="Wei J" first="J. C." last="Wei">J. C. Wei</name><affiliation><mods:affiliation>Department of Atmospheric Sciences, University of Illinois at Urbana‐Champaign, Urbana, Illinois, USA</mods:affiliation></affiliation><affiliation><mods:affiliation>Now at QSS Group, Inc., Lanham, Maryland, USA.</mods:affiliation></affiliation></author><author><name sortKey="Kinnison, D E" sort="Kinnison, D E" uniqKey="Kinnison D" first="D. E." last="Kinnison">D. E. Kinnison</name><affiliation><mods:affiliation>Atmospheric Chemistry Division, National Center for Atmospheric Research, Colorado, Boulder, USA</mods:affiliation></affiliation></author><author><name sortKey="Garcia, R R" sort="Garcia, R R" uniqKey="Garcia R" first="R. R." last="Garcia">R. R. Garcia</name><affiliation><mods:affiliation>Atmospheric Chemistry Division, National Center for Atmospheric Research, Colorado, Boulder, USA</mods:affiliation></affiliation></author><author><name sortKey="Wuebbles, D J" sort="Wuebbles, D J" uniqKey="Wuebbles D" first="D. J." last="Wuebbles">D. J. Wuebbles</name><affiliation><mods:affiliation>Department of Atmospheric Sciences, University of Illinois at Urbana‐Champaign, Illinois, Urbana, USA</mods:affiliation></affiliation></author><author><name sortKey="Brasseur, G P" sort="Brasseur, G P" uniqKey="Brasseur G" first="G. P." last="Brasseur">G. P. Brasseur</name><affiliation><mods:affiliation>Atmospheric Chemistry Division, National Center for Atmospheric Research, Colorado, Boulder, USA</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">Journal of Geophysical Research: Atmospheres</title><title level="j" type="abbrev">J. Geophys. Res.</title><idno type="ISSN">0148-0227</idno><idno type="eISSN">2156-2202</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><date type="published" when="2007-05-16">2007-05-16</date><biblScope unit="volume">112</biblScope><biblScope unit="issue">D9</biblScope><biblScope unit="page" from="n/a">n/a</biblScope><biblScope unit="page" to="n/a">n/a</biblScope></imprint><idno type="ISSN">0148-0227</idno></series><idno type="istex">D4E46EB072303596AA3357C8880A004B47F89B2B</idno><idno type="DOI">10.1029/2006JD007792</idno><idno type="ArticleID">2006JD007792</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0148-0227</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">Three related diagnostics are used to evaluate the representation of chemical transport processes in the extratropical upper troposphere and lower stratosphere (UTLS) by chemistry‐transport and chemistry‐climate models. The diagnostics are based on in situ observations of ozone, carbon monoxide, water vapor profiles (obtained on board the NASA ER‐2 research aircraft, near 65°N and during 1997), and their interrelationships in the UTLS. The first diagnostic compares the observed and modeled UTLS trace gas profiles in a relative altitude coordinate. The second one compares the observed and modeled UTLS tracer relationships. The third one compares the observed and modeled thickness of the tropopause transition layer. Together, they characterize the model's ability to reproduce the observed chemical distribution in the UTLS region and chemical transition across the extratropical tropopause. These are key indicators of whether the contributions of dynamics and chemistry to this region are correctly represented in the models. These diagnostics are used to evaluate the performance of an NCAR chemistry‐transport model (CTM), MOZART‐3, and a chemistry‐climate model (CCM), WACCM3. Results from four model runs with different meteorological fields and grid resolution are examined. Overall, the NCAR models show qualitative agreement with the observations in the location of the chemical transition across the extratropical tropopause. Quantitatively, there are significant differences between the modeled and the observed chemical distributions. Both the meteorological field and grid resolutions are contributing factors to the differences.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>L. L. Pan</name><affiliations><json:string>E-mail: liwen@ucar.edu</json:string><json:string>Atmospheric Chemistry Division, National Center for Atmospheric Research, Colorado, Boulder, USA</json:string></affiliations></json:item><json:item><name>J. C. Wei</name><affiliations><json:string>Department of Atmospheric Sciences, University of Illinois at Urbana‐Champaign, Urbana, Illinois, USA</json:string><json:string>Now at QSS Group, Inc., Lanham, Maryland, USA.</json:string></affiliations></json:item><json:item><name>D. E. Kinnison</name><affiliations><json:string>Atmospheric Chemistry Division, National Center for Atmospheric Research, Colorado, Boulder, USA</json:string></affiliations></json:item><json:item><name>R. R. Garcia</name><affiliations><json:string>Atmospheric Chemistry Division, National Center for Atmospheric Research, Colorado, Boulder, USA</json:string></affiliations></json:item><json:item><name>D. J. Wuebbles</name><affiliations><json:string>Department of Atmospheric Sciences, University of Illinois at Urbana‐Champaign, Illinois, Urbana, USA</json:string></affiliations></json:item><json:item><name>G. P. Brasseur</name><affiliations><json:string>Atmospheric Chemistry Division, National Center for Atmospheric Research, Colorado, Boulder, USA</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>chemistry transport models</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>chemistry‐climate models</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>model diagnostics and validation</value></json:item></subject><language><json:string>eng</json:string></language><abstract>Three related diagnostics are used to evaluate the representation of chemical transport processes in the extratropical upper troposphere and lower stratosphere (UTLS) by chemistry‐transport and chemistry‐climate models. The diagnostics are based on in situ observations of ozone, carbon monoxide, water vapor profiles (obtained on board the NASA ER‐2 research aircraft, near 65°N and during 1997), and their interrelationships in the UTLS. The first diagnostic compares the observed and modeled UTLS trace gas profiles in a relative altitude coordinate. The second one compares the observed and modeled UTLS tracer relationships. The third one compares the observed and modeled thickness of the tropopause transition layer. Together, they characterize the model's ability to reproduce the observed chemical distribution in the UTLS region and chemical transition across the extratropical tropopause. These are key indicators of whether the contributions of dynamics and chemistry to this region are correctly represented in the models. These diagnostics are used to evaluate the performance of an NCAR chemistry‐transport model (CTM), MOZART‐3, and a chemistry‐climate model (CCM), WACCM3. Results from four model runs with different meteorological fields and grid resolution are examined. Overall, the NCAR models show qualitative agreement with the observations in the location of the chemical transition across the extratropical tropopause. Quantitatively, there are significant differences between the modeled and the observed chemical distributions. Both the meteorological field and grid resolutions are contributing factors to the differences.</abstract><qualityIndicators><score>8.248</score><pdfVersion>1.4</pdfVersion><pdfPageSize>612 x 792 pts (letter)</pdfPageSize><refBibsNative>true</refBibsNative><keywordCount>3</keywordCount><abstractCharCount>1650</abstractCharCount><pdfWordCount>7199</pdfWordCount><pdfCharCount>43303</pdfCharCount><pdfPageCount>12</pdfPageCount><abstractWordCount>229</abstractWordCount></qualityIndicators><title>A set of diagnostics for evaluating chemistry‐climate models in the extratropical tropopause region</title><genre><json:string>article</json:string></genre><host><volume>112</volume><pages><total>12</total><last>n/a</last><first>n/a</first></pages><issn><json:string>0148-0227</json:string></issn><issue>D9</issue><subject><json:item><value>Composition and Chemistry</value></json:item><json:item><value>ATMOSPHERIC COMPOSITION AND STRUCTURE</value></json:item><json:item><value>Middle atmosphere: constituent transport and chemistry</value></json:item><json:item><value>ATMOSPHERIC PROCESSES</value></json:item><json:item><value>Stratosphere/troposphere interactions</value></json:item><json:item><value>Middle atmosphere dynamics</value></json:item><json:item><value>Composition and Chemistry</value></json:item></subject><genre></genre><language><json:string>unknown</json:string></language><eissn><json:string>2156-2202</json:string></eissn><title>Journal of Geophysical Research: Atmospheres</title><doi><json:string>10.1002/(ISSN)2156-2202d</json:string></doi></host><publicationDate>2007</publicationDate><copyrightDate>2007</copyrightDate><doi><json:string>10.1029/2006JD007792</json:string></doi><id>D4E46EB072303596AA3357C8880A004B47F89B2B</id><fulltext><json:item><original>true</original><mimetype>application/pdf</mimetype><extension>pdf</extension><uri>https://api.istex.fr/document/D4E46EB072303596AA3357C8880A004B47F89B2B/fulltext/pdf</uri></json:item><json:item><original>false</original><mimetype>application/zip</mimetype><extension>zip</extension><uri>https://api.istex.fr/document/D4E46EB072303596AA3357C8880A004B47F89B2B/fulltext/zip</uri></json:item><istex:fulltextTEI uri="https://api.istex.fr/document/D4E46EB072303596AA3357C8880A004B47F89B2B/fulltext/tei"><teiHeader><fileDesc><titleStmt><title level="a" type="main" xml:lang="en">A set of diagnostics for evaluating chemistry‐climate models in the extratropical tropopause region</title></titleStmt><publicationStmt><authority>ISTEX</authority><publisher>Blackwell Publishing Ltd</publisher><availability><p>WILEY</p></availability><date>2007</date></publicationStmt><notesStmt><note>Tab‐delimited Table 1.Tab‐delimited Table A1.Tab‐delimited Table A2.Tab‐delimited Table A3.</note></notesStmt><sourceDesc><biblStruct type="inbook"><analytic><title level="a" type="main" xml:lang="en">A set of diagnostics for evaluating chemistry‐climate models in the extratropical tropopause region</title><author><persName><forename type="first">L. 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R.</forename><surname>Garcia</surname></persName><affiliation>Atmospheric Chemistry Division, National Center for Atmospheric Research, Colorado, Boulder, USA</affiliation></author><author><persName><forename type="first">D. J.</forename><surname>Wuebbles</surname></persName><affiliation>Department of Atmospheric Sciences, University of Illinois at Urbana‐Champaign, Illinois, Urbana, USA</affiliation></author><author><persName><forename type="first">G. P.</forename><surname>Brasseur</surname></persName><affiliation>Atmospheric Chemistry Division, National Center for Atmospheric Research, Colorado, Boulder, USA</affiliation></author></analytic><monogr><title level="j">Journal of Geophysical Research: Atmospheres</title><title level="j" type="abbrev">J. Geophys. Res.</title><idno type="pISSN">0148-0227</idno><idno type="eISSN">2156-2202</idno><idno type="DOI">10.1002/(ISSN)2156-2202d</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><date type="published" when="2007-05-16"></date><biblScope unit="volume">112</biblScope><biblScope unit="issue">D9</biblScope><biblScope unit="page" from="n/a">n/a</biblScope><biblScope unit="page" to="n/a">n/a</biblScope></imprint></monogr><idno type="istex">D4E46EB072303596AA3357C8880A004B47F89B2B</idno><idno type="DOI">10.1029/2006JD007792</idno><idno type="ArticleID">2006JD007792</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>2007</date></creation><langUsage><language ident="en">en</language></langUsage><abstract><p>Three related diagnostics are used to evaluate the representation of chemical transport processes in the extratropical upper troposphere and lower stratosphere (UTLS) by chemistry‐transport and chemistry‐climate models. The diagnostics are based on in situ observations of ozone, carbon monoxide, water vapor profiles (obtained on board the NASA ER‐2 research aircraft, near 65°N and during 1997), and their interrelationships in the UTLS. The first diagnostic compares the observed and modeled UTLS trace gas profiles in a relative altitude coordinate. The second one compares the observed and modeled UTLS tracer relationships. The third one compares the observed and modeled thickness of the tropopause transition layer. Together, they characterize the model's ability to reproduce the observed chemical distribution in the UTLS region and chemical transition across the extratropical tropopause. These are key indicators of whether the contributions of dynamics and chemistry to this region are correctly represented in the models. These diagnostics are used to evaluate the performance of an NCAR chemistry‐transport model (CTM), MOZART‐3, and a chemistry‐climate model (CCM), WACCM3. Results from four model runs with different meteorological fields and grid resolution are examined. Overall, the NCAR models show qualitative agreement with the observations in the location of the chemical transition across the extratropical tropopause. Quantitatively, there are significant differences between the modeled and the observed chemical distributions. Both the meteorological field and grid resolutions are contributing factors to the differences.</p></abstract><textClass><keywords scheme="keyword"><list><head>Keywords</head><item><term>chemistry transport models</term></item><item><term>chemistry‐climate models</term></item><item><term>model diagnostics and validation</term></item></list></keywords></textClass><textClass><keywords scheme="Journal Subject"><list><head>Index Terms</head><item><term>Composition and Chemistry</term></item><item><term>ATMOSPHERIC COMPOSITION AND STRUCTURE</term></item><item><term>Middle atmosphere: constituent transport and chemistry</term></item><item><term>ATMOSPHERIC PROCESSES</term></item><item><term>Stratosphere/troposphere interactions</term></item><item><term>Middle atmosphere dynamics</term></item></list></keywords></textClass><textClass><keywords scheme="Journal Subject"><list><head>article category</head><item><term>Composition and Chemistry</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2006-07-14">Received</change><change when="2006-12-13">Registration</change><change when="2007-05-16">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><original>false</original><mimetype>text/plain</mimetype><extension>txt</extension><uri>https://api.istex.fr/document/D4E46EB072303596AA3357C8880A004B47F89B2B/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Wiley, elements deleted: body"><istex:xmlDeclaration>version="1.0" encoding="UTF-8" standalone="yes"</istex:xmlDeclaration><istex:document><component type="serialArticle" version="2.0" xml:lang="en" xml:id="jgrd13388"><header><publicationMeta level="product"><doi>10.1002/(ISSN)2156-2202d</doi><issn type="print">0148-0227</issn><issn type="electronic">2156-2202</issn><idGroup><id type="product" value="JGRD"></id><id type="coden" value="JGREA2"></id></idGroup><titleGroup><title type="main" xml:lang="en" sort="JOURNAL OF GEOPHYSICAL RESEARCH: ATMOSPHERES">Journal of Geophysical Research: Atmospheres</title><title type="short">J. 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L.</givenNames></author>, <author><givenNames>J. C.</givenNames> <familyName>Wei</familyName></author>, <author><givenNames>D. E.</givenNames> <familyName>Kinnison</familyName></author>, <author><givenNames>R. R.</givenNames> <familyName>Garcia</familyName></author>, <author><givenNames>D. J.</givenNames> <familyName>Wuebbles</familyName></author>, and <author><givenNames>G. P.</givenNames> <familyName>Brasseur</familyName></author> (<pubYear year="2007">2007</pubYear>), <articleTitle>A set of diagnostics for evaluating chemistry‐climate models in the extratropical tropopause region</articleTitle>, <journalTitle>J. Geophys. 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L.</givenNames> <familyName>Pan</familyName></personName><contactDetails><email normalForm="liwen@ucar.edu">liwen@ucar.edu</email></contactDetails></creator><creator creatorRole="author" xml:id="jgrd13388-cr-0002" affiliationRef="#jgrd13388-aff-0002 #jgrd13388-aff-0003"><personName><givenNames>J. C.</givenNames> <familyName>Wei</familyName></personName></creator><creator creatorRole="author" xml:id="jgrd13388-cr-0003" affiliationRef="#jgrd13388-aff-0001"><personName><givenNames>D. E.</givenNames> <familyName>Kinnison</familyName></personName></creator><creator creatorRole="author" xml:id="jgrd13388-cr-0004" affiliationRef="#jgrd13388-aff-0001"><personName><givenNames>R. R.</givenNames> <familyName>Garcia</familyName></personName></creator><creator creatorRole="author" xml:id="jgrd13388-cr-0005" affiliationRef="#jgrd13388-aff-0002"><personName><givenNames>D. J.</givenNames> <familyName>Wuebbles</familyName></personName></creator><creator creatorRole="author" xml:id="jgrd13388-cr-0006" affiliationRef="#jgrd13388-aff-0001"><personName><givenNames>G. P.</givenNames> <familyName>Brasseur</familyName></personName></creator></creators><affiliationGroup><affiliation countryCode="US" type="organization" xml:id="jgrd13388-aff-0001"><orgDiv>Atmospheric Chemistry Division</orgDiv><orgName>National Center for Atmospheric Research</orgName><address><city>Boulder</city><countryPart>Colorado</countryPart><country>USA</country></address></affiliation><affiliation countryCode="US" type="organization" xml:id="jgrd13388-aff-0002"><orgDiv>Department of Atmospheric Sciences</orgDiv><orgName>University of Illinois at Urbana‐Champaign</orgName><address><city>Urbana</city><countryPart>Illinois</countryPart><country>USA</country></address></affiliation><affiliation type="organization" xml:id="jgrd13388-aff-0003"><unparsedAffiliation>Now at QSS Group, Inc., Lanham, Maryland, USA.</unparsedAffiliation></affiliation></affiliationGroup><keywordGroup type="author"><keyword xml:id="jgrd13388-kwd-0001">chemistry transport models</keyword><keyword xml:id="jgrd13388-kwd-0002">chemistry‐climate models</keyword><keyword xml:id="jgrd13388-kwd-0003">model diagnostics and validation</keyword></keywordGroup><supportingInformation><supportingInfoItem><mediaResource alt="supplementary data" mimeType="text/plain" href="urn-x:wiley:01480227:media:jgrd13388:jgrd13388-sup-0001-t01"></mediaResource><caption>Tab‐delimited Table 1.</caption></supportingInfoItem><supportingInfoItem><mediaResource alt="supplementary data" mimeType="text/plain" href="urn-x:wiley:01480227:media:jgrd13388:jgrd13388-sup-0002-ta1"></mediaResource><caption>Tab‐delimited Table A1.</caption></supportingInfoItem><supportingInfoItem><mediaResource alt="supplementary data" mimeType="text/plain" href="urn-x:wiley:01480227:media:jgrd13388:jgrd13388-sup-0003-ta2"></mediaResource><caption>Tab‐delimited Table A2.</caption></supportingInfoItem><supportingInfoItem><mediaResource alt="supplementary data" mimeType="text/plain" href="urn-x:wiley:01480227:media:jgrd13388:jgrd13388-sup-0004-ta3"></mediaResource><caption>Tab‐delimited Table A3.</caption></supportingInfoItem></supportingInformation><abstractGroup><abstract type="main"><p xml:id="jgrd13388-para-0001" label="1">Three related diagnostics are used to evaluate the representation of chemical transport processes in the extratropical upper troposphere and lower stratosphere (UTLS) by chemistry‐transport and chemistry‐climate models. The diagnostics are based on in situ observations of ozone, carbon monoxide, water vapor profiles (obtained on board the NASA ER‐2 research aircraft, near 65°N and during 1997), and their interrelationships in the UTLS. The first diagnostic compares the observed and modeled UTLS trace gas profiles in a relative altitude coordinate. The second one compares the observed and modeled UTLS tracer relationships. The third one compares the observed and modeled thickness of the tropopause transition layer. Together, they characterize the model's ability to reproduce the observed chemical distribution in the UTLS region and chemical transition across the extratropical tropopause. These are key indicators of whether the contributions of dynamics and chemistry to this region are correctly represented in the models. These diagnostics are used to evaluate the performance of an NCAR chemistry‐transport model (CTM), MOZART‐3, and a chemistry‐climate model (CCM), WACCM3. Results from four model runs with different meteorological fields and grid resolution are examined. Overall, the NCAR models show qualitative agreement with the observations in the location of the chemical transition across the extratropical tropopause. Quantitatively, there are significant differences between the modeled and the observed chemical distributions. Both the meteorological field and grid resolutions are contributing factors to the differences.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>A set of diagnostics for evaluating chemistry‐climate models in the extratropical tropopause region</title></titleInfo><titleInfo type="abbreviated"><title>DIAGNOSTICS FOR CHEMISTRY‐CLIMATE MODELS</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>A set of diagnostics for evaluating chemistry‐climate models in the extratropical tropopause region</title></titleInfo><name type="personal"><namePart type="given">L. L.</namePart><namePart type="family">Pan</namePart><affiliation>E-mail: liwen@ucar.edu</affiliation><affiliation>Atmospheric Chemistry Division, National Center for Atmospheric Research, Colorado, Boulder, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J. C.</namePart><namePart type="family">Wei</namePart><affiliation>Department of Atmospheric Sciences, University of Illinois at Urbana‐Champaign, Urbana, Illinois, USA</affiliation><affiliation>Now at QSS Group, Inc., Lanham, Maryland, USA.</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">D. E.</namePart><namePart type="family">Kinnison</namePart><affiliation>Atmospheric Chemistry Division, National Center for Atmospheric Research, Colorado, Boulder, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">R. R.</namePart><namePart type="family">Garcia</namePart><affiliation>Atmospheric Chemistry Division, National Center for Atmospheric Research, 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 at Urbana‐Champaign, Illinois, Urbana, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">G. P.</namePart><namePart type="family">Brasseur</namePart><affiliation>Atmospheric Chemistry Division, National Center for Atmospheric Research, Colorado, Boulder, 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">2007-05-16</dateIssued><dateCaptured encoding="w3cdtf">2006-07-14</dateCaptured><dateValid encoding="w3cdtf">2006-12-13</dateValid><edition>Pan, L. L., J. C. Wei, D. E. Kinnison, R. R. Garcia, D. J. Wuebbles, and G. P. Brasseur (2007), A set of diagnostics for evaluating chemistry‐climate models in the extratropical tropopause region, J. Geophys. Res., 112, D09316, doi:10.1029/2006JD007792.</edition><copyrightDate encoding="w3cdtf">2007</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">6</extent><extent unit="tables">4</extent></physicalDescription><abstract>Three related diagnostics are used to evaluate the representation of chemical transport processes in the extratropical upper troposphere and lower stratosphere (UTLS) by chemistry‐transport and chemistry‐climate models. The diagnostics are based on in situ observations of ozone, carbon monoxide, water vapor profiles (obtained on board the NASA ER‐2 research aircraft, near 65°N and during 1997), and their interrelationships in the UTLS. The first diagnostic compares the observed and modeled UTLS trace gas profiles in a relative altitude coordinate. The second one compares the observed and modeled UTLS tracer relationships. The third one compares the observed and modeled thickness of the tropopause transition layer. Together, they characterize the model's ability to reproduce the observed chemical distribution in the UTLS region and chemical transition across the extratropical tropopause. These are key indicators of whether the contributions of dynamics and chemistry to this region are correctly represented in the models. These diagnostics are used to evaluate the performance of an NCAR chemistry‐transport model (CTM), MOZART‐3, and a chemistry‐climate model (CCM), WACCM3. Results from four model runs with different meteorological fields and grid resolution are examined. Overall, the NCAR models show qualitative agreement with the observations in the location of the chemical transition across the extratropical tropopause. Quantitatively, there are significant differences between the modeled and the observed chemical distributions. Both the meteorological field and grid resolutions are contributing factors to the differences.</abstract><note type="additional physical form">Tab‐delimited Table 1.Tab‐delimited Table A1.Tab‐delimited Table A2.Tab‐delimited Table A3.</note><subject><genre>Keywords</genre><topic>chemistry transport models</topic><topic>chemistry‐climate models</topic><topic>model diagnostics and validation</topic></subject><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/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/taxonomy5/0341">Middle atmosphere: constituent transport and chemistry</topic><topic authorityURI="http://psi.agu.org/taxonomy5/3300">ATMOSPHERIC PROCESSES</topic><topic authorityURI="http://psi.agu.org/taxonomy5/3362">Stratosphere/troposphere interactions</topic><topic authorityURI="http://psi.agu.org/taxonomy5/3334">Middle atmosphere dynamics</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>2007</date><detail type="volume"><caption>vol.</caption><number>112</number></detail><detail type="issue"><caption>no.</caption><number>D9</number></detail><extent unit="pages"><start>n/a</start><end>n/a</end><total>12</total></extent></part></relatedItem><identifier type="istex">D4E46EB072303596AA3357C8880A004B47F89B2B</identifier><identifier type="DOI">10.1029/2006JD007792</identifier><identifier type="ArticleID">2006JD007792</identifier><accessCondition type="use and reproduction" contentType="copyright">Copyright 2007 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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