Effects of atmospheric light scattering on spectroscopic observations of greenhouse gases from space. Part 2: Algorithm intercomparison in the GOSAT data processing for CO2 retrievals over TCCON sites
Identifieur interne : 004A77 ( Main/Exploration ); précédent : 004A76; suivant : 004A78Effects of atmospheric light scattering on spectroscopic observations of greenhouse gases from space. Part 2: Algorithm intercomparison in the GOSAT data processing for CO2 retrievals over TCCON sites
Auteurs : Sergey Oshchepkov [Japon] ; Andrey Bril [Japon] ; Tatsuya Yokota [Japon] ; Paul O. Wennberg [États-Unis] ; Nicholas M. Deutscher [Australie, Allemagne] ; Debra Wunch [États-Unis] ; Geoffrey C. Toon [États-Unis] ; Yukio Yoshida [Japon] ; Christopher W. O'Dell [États-Unis] ; David Crisp [États-Unis] ; Charles E. Miller [États-Unis] ; Christian Frankenberg [États-Unis] ; André Butz [Allemagne] ; Ilse Aben [Pays-Bas] ; Sandrine Guerlet [Pays-Bas] ; Otto Hasekamp [Pays-Bas] ; Hartmut Boesch [Royaume-Uni] ; Austin Cogan [Royaume-Uni] ; Robert Parker [Royaume-Uni] ; David Griffith [Australie] ; Ronald Macatangay [Australie] ; Justus Notholt [Allemagne] ; Ralf Sussmann [Allemagne] ; Markus Rettinger [Allemagne] ; Vanessa Sherlock [Nouvelle-Zélande] ; John Robinson [Nouvelle-Zélande] ; Esko Kyrö [Finlande] ; Pauli Heikkinen [Finlande] ; Dietrich G. Feist [Allemagne] ; Isamu Morino [Japon] ; Nikolay Kadygrov [France] ; Dmitry Belikov [Japon] ; Shamil Maksyutov [Japon] ; Tsuneo Matsunaga [Japon] ; Osamu Uchino [Japon] ; Hiroshi Watanabe [Japon]Source :
- Journal of Geophysical Research: Atmospheres [ 2169-897X ] ; 2013-02-16.
Descripteurs français
- Wicri :
- topic : Aérosol, Brême, Traitement des données.
English descriptors
- KwdEn :
- Aben, Acos, Acos algorithms, Aerosol, Aerosol retrievals, Albedo, Algorithm, Appl, Atmos, Atmospheric carbon dioxide, Atmospheric light, Belikov, Best agreement, Bias, Bremen, Bright surfaces, Bril, Butz, California institute, Carbon dioxide, Chem, Cirrus, Coincidence criteria, Coincident, Coincident observations, Data processing, Data product, Data products, Different algorithms, Dioxide, Environmental studies, Frankenberg, Garmisch, Geophys, Global bias, Good agreement, Gosat, Gosat algorithm comparison, Gosat algorithm comparison figure, Gosat data, Gosat data processing, Gosat observations, Gosat retrieval algorithms, Gosat scans, Gosat soundings, Greenhouse, Greenhouse gases, Hartmann, Hasekamp, Histogram, Inset, Irradiance, Lamont, Lamont site, Largest number, Lauder, Light path, Light path variability, Lter, Meas, Modeling, Nakajima, National institute, Northern hemisphere, Northern hemisphere sites, Ny, Optical path, Oshchepkov, Other algorithms, Photon, Phys, Posteriori, Ppdf, Ppdf parameters, Quant, Radiance spectra, Radiative, Radius circle, Regression slope, Remotec, Retrieval, Retrieval algorithm, Retrieval bias, Right column, Satellite observations, Scan, Scan counts, Seasonal variability, Single scans, Sounding, Southern hemisphere, Southern hemisphere sites, Spectral bands, Spectral variability, Spectrosc, Spectroscopic, Spectroscopic observations, Standard deviation, Statistical characteristics, Surface albedo, Surface pressure, Surface pressure bias, Tccon, Tccon data, Tccon measurements, Tccon site, Tccon sites, Tccon stations, Tccon xco2, Toon, Toon model, Total carbon column, Tsukuba, Validation, Variability, Wollongong, Wunch, Xco2, Xco2 retrievals, Yokota, Yoshida.
- Teeft :
- Aben, Acos, Acos algorithms, Aerosol, Aerosol retrievals, Albedo, Algorithm, Appl, Atmos, Atmospheric carbon dioxide, Atmospheric light, Belikov, Best agreement, Bias, Bremen, Bright surfaces, Bril, Butz, California institute, Carbon dioxide, Chem, Cirrus, Coincidence criteria, Coincident, Coincident observations, Data processing, Data product, Data products, Different algorithms, Dioxide, Environmental studies, Frankenberg, Garmisch, Geophys, Global bias, Good agreement, Gosat, Gosat algorithm comparison, Gosat algorithm comparison figure, Gosat data, Gosat data processing, Gosat observations, Gosat retrieval algorithms, Gosat scans, Gosat soundings, Greenhouse, Greenhouse gases, Hartmann, Hasekamp, Histogram, Inset, Irradiance, Lamont, Lamont site, Largest number, Lauder, Light path, Light path variability, Lter, Meas, Modeling, Nakajima, National institute, Northern hemisphere, Northern hemisphere sites, Ny, Optical path, Oshchepkov, Other algorithms, Photon, Phys, Posteriori, Ppdf, Ppdf parameters, Quant, Radiance spectra, Radiative, Radius circle, Regression slope, Remotec, Retrieval, Retrieval algorithm, Retrieval bias, Right column, Satellite observations, Scan, Scan counts, Seasonal variability, Single scans, Sounding, Southern hemisphere, Southern hemisphere sites, Spectral bands, Spectral variability, Spectrosc, Spectroscopic, Spectroscopic observations, Standard deviation, Statistical characteristics, Surface albedo, Surface pressure, Surface pressure bias, Tccon, Tccon data, Tccon measurements, Tccon site, Tccon sites, Tccon stations, Tccon xco2, Toon, Toon model, Total carbon column, Tsukuba, Validation, Variability, Wollongong, Wunch, Xco2, Xco2 retrievals, Yokota, Yoshida.
Abstract
This report is the second in a series of companion papers describing the effects of atmospheric light scattering in observations of atmospheric carbon dioxide (CO2) by the Greenhouse gases Observing SATellite (GOSAT), in orbit since 23 January 2009. Here we summarize the retrievals from six previously published algorithms; retrieving column‐averaged dry air mole fractions of CO2 (XCO2) during 22 months of operation of GOSAT from June 2009. First, we compare data products from each algorithm with ground‐based remote sensing observations by Total Carbon Column Observing Network (TCCON). Our GOSAT‐TCCON coincidence criteria select satellite observations within a 5° radius of 11 TCCON sites. We have compared the GOSAT‐TCCON XCO2 regression slope, standard deviation, correlation and determination coefficients, and global and station‐to‐station biases. The best agreements with TCCON measurements were detected for NIES 02.xx and RemoTeC. Next, the impact of atmospheric light scattering on XCO2 retrievals was estimated for each data product using scan by scan retrievals of light path modification with the photon path length probability density function (PPDF) method. After a cloud pre‐filtering test, approximately 25% of GOSAT soundings processed by NIES 02.xx, ACOS B2.9, and UoL‐FP: 3G and 35% processed by RemoTeC were found to be contaminated by atmospheric light scattering. This study suggests that NIES 02.xx and ACOS B2.9 algorithms tend to overestimate aerosol amounts over bright surfaces, resulting in an underestimation of XCO2 for GOSAT observations. Cross‐comparison between algorithms shows that ACOS B2.9 agrees best with NIES 02.xx and UoL‐FP: 3G while RemoTeC XCO2 retrievals are in a best agreement with NIES PPDF‐D.
Url:
DOI: 10.1002/jgrd.50146
Affiliations:
- Allemagne, Australie, Finlande, France, Japon, Nouvelle-Zélande, Pays-Bas, Royaume-Uni, États-Unis
- Bade-Wurtemberg, Brême (Land), District de Karlsruhe, Utrecht (province)
- Brême, Karlsruhe, Utrecht
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Wennberg</name><affiliation wicri:level="1"><country xml:lang="fr">États-Unis</country><wicri:regionArea>California Institute of Technology, California, Pasadena</wicri:regionArea><wicri:noRegion>Pasadena</wicri:noRegion></affiliation></author><author><name sortKey="Deutscher, Nicholas M" sort="Deutscher, Nicholas M" uniqKey="Deutscher N" first="Nicholas M." last="Deutscher">Nicholas M. Deutscher</name><affiliation wicri:level="1"><country xml:lang="fr">Australie</country><wicri:regionArea>School of Chemistry and Centre for Atmospheric Chemistry, University of Wollongong, Wollongong, New South Wales</wicri:regionArea><wicri:noRegion>New South Wales</wicri:noRegion></affiliation><affiliation wicri:level="3"><country xml:lang="fr">Allemagne</country><wicri:regionArea>Institute of Environmental Physics, University of Bremen, Bremen</wicri:regionArea><placeName><region type="land" nuts="3">Brême (Land)</region><settlement type="city">Brême</settlement></placeName></affiliation></author><author><name sortKey="Wunch, Debra" sort="Wunch, Debra" uniqKey="Wunch D" first="Debra" last="Wunch">Debra Wunch</name><affiliation wicri:level="1"><country xml:lang="fr">États-Unis</country><wicri:regionArea>California Institute of Technology, California, Pasadena</wicri:regionArea><wicri:noRegion>Pasadena</wicri:noRegion></affiliation></author><author><name sortKey="Toon, Geoffrey C" sort="Toon, Geoffrey C" uniqKey="Toon G" first="Geoffrey C." last="Toon">Geoffrey C. Toon</name><affiliation wicri:level="1"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Jet Propulsion Laboratory, California Institute of Technology, California, Pasadena</wicri:regionArea><wicri:noRegion>Pasadena</wicri:noRegion></affiliation></author><author><name sortKey="Yoshida, Yukio" sort="Yoshida, Yukio" uniqKey="Yoshida Y" first="Yukio" last="Yoshida">Yukio Yoshida</name><affiliation wicri:level="1"><country xml:lang="fr">Japon</country><wicri:regionArea>National Institute for Environmental Studies, Tsukuba</wicri:regionArea><wicri:noRegion>Tsukuba</wicri:noRegion></affiliation></author><author><name sortKey="O Dell, Christopher W" sort="O Dell, Christopher W" uniqKey="O Dell C" first="Christopher W." last="O'Dell">Christopher W. O'Dell</name><affiliation wicri:level="1"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Colorado State University, Colorado, Fort Collins</wicri:regionArea><wicri:noRegion>Fort Collins</wicri:noRegion></affiliation></author><author><name sortKey="Crisp, David" sort="Crisp, David" uniqKey="Crisp D" first="David" last="Crisp">David Crisp</name><affiliation wicri:level="1"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Jet Propulsion Laboratory, California Institute of Technology, California, Pasadena</wicri:regionArea><wicri:noRegion>Pasadena</wicri:noRegion></affiliation></author><author><name sortKey="Miller, Charles E" sort="Miller, Charles E" uniqKey="Miller C" first="Charles E." last="Miller">Charles E. Miller</name><affiliation wicri:level="1"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Jet Propulsion Laboratory, California Institute of Technology, California, Pasadena</wicri:regionArea><wicri:noRegion>Pasadena</wicri:noRegion></affiliation></author><author><name sortKey="Frankenberg, Christian" sort="Frankenberg, Christian" uniqKey="Frankenberg C" first="Christian" last="Frankenberg">Christian Frankenberg</name><affiliation wicri:level="1"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Jet Propulsion Laboratory, California Institute of Technology, California, Pasadena</wicri:regionArea><wicri:noRegion>Pasadena</wicri:noRegion></affiliation></author><author><name sortKey="Butz, Andre" sort="Butz, Andre" uniqKey="Butz A" first="André" last="Butz">André Butz</name><affiliation wicri:level="3"><country xml:lang="fr">Allemagne</country><wicri:regionArea>Karlsruhe Institute of Technology, IMK‐ASF, Karlsruhe</wicri:regionArea><placeName><region type="land" nuts="1">Bade-Wurtemberg</region><region type="district" nuts="2">District de Karlsruhe</region><settlement type="city">Karlsruhe</settlement></placeName></affiliation></author><author><name sortKey="Aben, Ilse" sort="Aben, Ilse" uniqKey="Aben I" first="Ilse" last="Aben">Ilse Aben</name><affiliation wicri:level="3"><country xml:lang="fr">Pays-Bas</country><wicri:regionArea>SRON Netherlands Institute for Space Research, Utrecht</wicri:regionArea><placeName><settlement type="city">Utrecht</settlement><region nuts="2" type="province">Utrecht (province)</region></placeName></affiliation></author><author><name sortKey="Guerlet, Sandrine" sort="Guerlet, Sandrine" uniqKey="Guerlet S" first="Sandrine" last="Guerlet">Sandrine Guerlet</name><affiliation wicri:level="3"><country xml:lang="fr">Pays-Bas</country><wicri:regionArea>SRON Netherlands Institute for Space Research, Utrecht</wicri:regionArea><placeName><settlement type="city">Utrecht</settlement><region nuts="2" type="province">Utrecht (province)</region></placeName></affiliation></author><author><name sortKey="Hasekamp, Otto" sort="Hasekamp, Otto" uniqKey="Hasekamp O" first="Otto" last="Hasekamp">Otto Hasekamp</name><affiliation wicri:level="3"><country xml:lang="fr">Pays-Bas</country><wicri:regionArea>SRON Netherlands Institute for Space Research, Utrecht</wicri:regionArea><placeName><settlement type="city">Utrecht</settlement><region nuts="2" type="province">Utrecht (province)</region></placeName></affiliation></author><author><name sortKey="Boesch, Hartmut" sort="Boesch, Hartmut" uniqKey="Boesch H" first="Hartmut" last="Boesch">Hartmut Boesch</name><affiliation wicri:level="1"><country xml:lang="fr">Royaume-Uni</country><wicri:regionArea>Earth Observation Science, Space Research Centre, University of Leicester, Leicester</wicri:regionArea><wicri:noRegion>Leicester</wicri:noRegion></affiliation></author><author><name sortKey="Cogan, Austin" sort="Cogan, Austin" uniqKey="Cogan A" first="Austin" last="Cogan">Austin Cogan</name><affiliation wicri:level="1"><country xml:lang="fr">Royaume-Uni</country><wicri:regionArea>Earth Observation Science, Space Research Centre, University of Leicester, Leicester</wicri:regionArea><wicri:noRegion>Leicester</wicri:noRegion></affiliation></author><author><name sortKey="Parker, Robert" sort="Parker, Robert" uniqKey="Parker R" first="Robert" last="Parker">Robert Parker</name><affiliation wicri:level="1"><country xml:lang="fr">Royaume-Uni</country><wicri:regionArea>Earth Observation Science, Space Research Centre, University of Leicester, Leicester</wicri:regionArea><wicri:noRegion>Leicester</wicri:noRegion></affiliation></author><author><name sortKey="Griffith, David" sort="Griffith, David" uniqKey="Griffith D" first="David" last="Griffith">David Griffith</name><affiliation wicri:level="1"><country xml:lang="fr">Australie</country><wicri:regionArea>School of Chemistry and Centre for Atmospheric Chemistry, University of Wollongong, New South Wales, Wollongong</wicri:regionArea><wicri:noRegion>Wollongong</wicri:noRegion></affiliation></author><author><name sortKey="Macatangay, Ronald" sort="Macatangay, Ronald" uniqKey="Macatangay R" first="Ronald" last="Macatangay">Ronald Macatangay</name><affiliation wicri:level="1"><country xml:lang="fr">Australie</country><wicri:regionArea>School of Chemistry and Centre for Atmospheric Chemistry, University of Wollongong, New South Wales, Wollongong</wicri:regionArea><wicri:noRegion>Wollongong</wicri:noRegion></affiliation></author><author><name sortKey="Notholt, Justus" sort="Notholt, Justus" uniqKey="Notholt J" first="Justus" last="Notholt">Justus Notholt</name><affiliation wicri:level="3"><country xml:lang="fr">Allemagne</country><wicri:regionArea>Institute of Environmental Physics, University of Bremen, Bremen</wicri:regionArea><placeName><region type="land" nuts="3">Brême (Land)</region><settlement type="city">Brême</settlement></placeName></affiliation></author><author><name sortKey="Sussmann, Ralf" sort="Sussmann, Ralf" uniqKey="Sussmann R" first="Ralf" last="Sussmann">Ralf Sussmann</name><affiliation wicri:level="1"><country xml:lang="fr">Allemagne</country><wicri:regionArea>Karlsruhe Institute of Technology, IMK‐IFU, Garmisch‐Partenkirchen</wicri:regionArea><wicri:noRegion>Garmisch‐Partenkirchen</wicri:noRegion><wicri:noRegion>Garmisch‐Partenkirchen</wicri:noRegion></affiliation></author><author><name sortKey="Rettinger, Markus" sort="Rettinger, Markus" uniqKey="Rettinger M" first="Markus" last="Rettinger">Markus Rettinger</name><affiliation wicri:level="1"><country xml:lang="fr">Allemagne</country><wicri:regionArea>Karlsruhe Institute of Technology, IMK‐IFU, Garmisch‐Partenkirchen</wicri:regionArea><wicri:noRegion>Garmisch‐Partenkirchen</wicri:noRegion><wicri:noRegion>Garmisch‐Partenkirchen</wicri:noRegion></affiliation></author><author><name sortKey="Sherlock, Vanessa" sort="Sherlock, Vanessa" uniqKey="Sherlock V" first="Vanessa" last="Sherlock">Vanessa Sherlock</name><affiliation wicri:level="1"><country xml:lang="fr">Nouvelle-Zélande</country><wicri:regionArea>National Institute of Water and Atmospheric Research, Wellington</wicri:regionArea><wicri:noRegion>Wellington</wicri:noRegion></affiliation></author><author><name sortKey="Robinson, John" sort="Robinson, John" uniqKey="Robinson J" first="John" last="Robinson">John Robinson</name><affiliation wicri:level="1"><country xml:lang="fr">Nouvelle-Zélande</country><wicri:regionArea>National Institute of Water and Atmospheric Research, Wellington</wicri:regionArea><wicri:noRegion>Wellington</wicri:noRegion></affiliation></author><author><name sortKey="Kyro, Esko" sort="Kyro, Esko" uniqKey="Kyro E" first="Esko" last="Kyrö">Esko Kyrö</name><affiliation wicri:level="1"><country xml:lang="fr">Finlande</country><wicri:regionArea>FMI‐Arctic Research Center, Sodankylä</wicri:regionArea><wicri:noRegion>Sodankylä</wicri:noRegion></affiliation></author><author><name sortKey="Heikkinen, Pauli" sort="Heikkinen, Pauli" uniqKey="Heikkinen P" first="Pauli" last="Heikkinen">Pauli Heikkinen</name><affiliation wicri:level="1"><country xml:lang="fr">Finlande</country><wicri:regionArea>FMI‐Arctic Research Center, Sodankylä</wicri:regionArea><wicri:noRegion>Sodankylä</wicri:noRegion></affiliation></author><author><name sortKey="Feist, Dietrich G" sort="Feist, Dietrich G" uniqKey="Feist D" first="Dietrich G." last="Feist">Dietrich G. Feist</name><affiliation wicri:level="1"><country xml:lang="fr">Allemagne</country><wicri:regionArea>Max Planck Institute for Biogeochemistry, Jena</wicri:regionArea><wicri:noRegion>Jena</wicri:noRegion><wicri:noRegion>Jena</wicri:noRegion></affiliation></author><author><name sortKey="Morino, Isamu" sort="Morino, Isamu" uniqKey="Morino I" first="Isamu" last="Morino">Isamu Morino</name><affiliation wicri:level="1"><country xml:lang="fr">Japon</country><wicri:regionArea>National Institute for Environmental Studies, Tsukuba</wicri:regionArea><wicri:noRegion>Tsukuba</wicri:noRegion></affiliation></author><author><name sortKey="Kadygrov, Nikolay" sort="Kadygrov, Nikolay" uniqKey="Kadygrov N" first="Nikolay" last="Kadygrov">Nikolay Kadygrov</name><affiliation wicri:level="1"><country xml:lang="fr">France</country><wicri:regionArea>Laboratoire des Sciences du Climat et de l'Environnement, CEA, UVSQ, SNRS, Gif‐sur‐Yvette</wicri:regionArea><wicri:noRegion>Gif‐sur‐Yvette</wicri:noRegion><wicri:noRegion>Gif‐sur‐Yvette</wicri:noRegion></affiliation></author><author><name sortKey="Belikov, Dmitry" sort="Belikov, Dmitry" uniqKey="Belikov D" first="Dmitry" last="Belikov">Dmitry Belikov</name><affiliation wicri:level="1"><country xml:lang="fr">Japon</country><wicri:regionArea>National Institute for Environmental Studies, Tsukuba</wicri:regionArea><wicri:noRegion>Tsukuba</wicri:noRegion></affiliation></author><author><name sortKey="Maksyutov, Shamil" sort="Maksyutov, Shamil" uniqKey="Maksyutov S" first="Shamil" last="Maksyutov">Shamil Maksyutov</name><affiliation wicri:level="1"><country xml:lang="fr">Japon</country><wicri:regionArea>National Institute for Environmental Studies, Tsukuba</wicri:regionArea><wicri:noRegion>Tsukuba</wicri:noRegion></affiliation></author><author><name sortKey="Matsunaga, Tsuneo" sort="Matsunaga, Tsuneo" uniqKey="Matsunaga T" first="Tsuneo" last="Matsunaga">Tsuneo Matsunaga</name><affiliation wicri:level="1"><country xml:lang="fr">Japon</country><wicri:regionArea>National Institute for Environmental Studies, Tsukuba</wicri:regionArea><wicri:noRegion>Tsukuba</wicri:noRegion></affiliation></author><author><name sortKey="Uchino, Osamu" sort="Uchino, Osamu" uniqKey="Uchino O" first="Osamu" last="Uchino">Osamu Uchino</name><affiliation wicri:level="1"><country xml:lang="fr">Japon</country><wicri:regionArea>National Institute for Environmental Studies, Tsukuba</wicri:regionArea><wicri:noRegion>Tsukuba</wicri:noRegion></affiliation></author><author><name sortKey="Watanabe, Hiroshi" sort="Watanabe, Hiroshi" uniqKey="Watanabe H" first="Hiroshi" last="Watanabe">Hiroshi Watanabe</name><affiliation wicri:level="1"><country xml:lang="fr">Japon</country><wicri:regionArea>National Institute for Environmental Studies, Tsukuba</wicri:regionArea><wicri:noRegion>Tsukuba</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j" type="main">Journal of Geophysical Research: Atmospheres</title><title level="j" type="alt">JOURNAL OF GEOPHYSICAL RESEARCH: ATMOSPHERES</title><idno type="ISSN">2169-897X</idno><idno type="eISSN">2169-8996</idno><imprint><biblScope unit="vol">118</biblScope><biblScope unit="issue">3</biblScope><biblScope unit="page" from="1493">1493</biblScope><biblScope unit="page" to="1512">1512</biblScope><biblScope unit="page-count">20</biblScope><date type="published" when="2013-02-16">2013-02-16</date></imprint><idno type="ISSN">2169-897X</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">2169-897X</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Aben</term><term>Acos</term><term>Acos algorithms</term><term>Aerosol</term><term>Aerosol retrievals</term><term>Albedo</term><term>Algorithm</term><term>Appl</term><term>Atmos</term><term>Atmospheric carbon dioxide</term><term>Atmospheric light</term><term>Belikov</term><term>Best agreement</term><term>Bias</term><term>Bremen</term><term>Bright surfaces</term><term>Bril</term><term>Butz</term><term>California institute</term><term>Carbon dioxide</term><term>Chem</term><term>Cirrus</term><term>Coincidence criteria</term><term>Coincident</term><term>Coincident observations</term><term>Data processing</term><term>Data product</term><term>Data products</term><term>Different algorithms</term><term>Dioxide</term><term>Environmental studies</term><term>Frankenberg</term><term>Garmisch</term><term>Geophys</term><term>Global bias</term><term>Good agreement</term><term>Gosat</term><term>Gosat algorithm comparison</term><term>Gosat algorithm comparison figure</term><term>Gosat data</term><term>Gosat data processing</term><term>Gosat observations</term><term>Gosat retrieval algorithms</term><term>Gosat scans</term><term>Gosat soundings</term><term>Greenhouse</term><term>Greenhouse gases</term><term>Hartmann</term><term>Hasekamp</term><term>Histogram</term><term>Inset</term><term>Irradiance</term><term>Lamont</term><term>Lamont site</term><term>Largest number</term><term>Lauder</term><term>Light path</term><term>Light path variability</term><term>Lter</term><term>Meas</term><term>Modeling</term><term>Nakajima</term><term>National institute</term><term>Northern hemisphere</term><term>Northern hemisphere sites</term><term>Ny</term><term>Optical path</term><term>Oshchepkov</term><term>Other algorithms</term><term>Photon</term><term>Phys</term><term>Posteriori</term><term>Ppdf</term><term>Ppdf parameters</term><term>Quant</term><term>Radiance spectra</term><term>Radiative</term><term>Radius circle</term><term>Regression slope</term><term>Remotec</term><term>Retrieval</term><term>Retrieval algorithm</term><term>Retrieval bias</term><term>Right column</term><term>Satellite observations</term><term>Scan</term><term>Scan counts</term><term>Seasonal variability</term><term>Single scans</term><term>Sounding</term><term>Southern hemisphere</term><term>Southern hemisphere sites</term><term>Spectral bands</term><term>Spectral variability</term><term>Spectrosc</term><term>Spectroscopic</term><term>Spectroscopic observations</term><term>Standard deviation</term><term>Statistical characteristics</term><term>Surface albedo</term><term>Surface pressure</term><term>Surface pressure bias</term><term>Tccon</term><term>Tccon data</term><term>Tccon measurements</term><term>Tccon site</term><term>Tccon sites</term><term>Tccon stations</term><term>Tccon xco2</term><term>Toon</term><term>Toon model</term><term>Total carbon column</term><term>Tsukuba</term><term>Validation</term><term>Variability</term><term>Wollongong</term><term>Wunch</term><term>Xco2</term><term>Xco2 retrievals</term><term>Yokota</term><term>Yoshida</term></keywords><keywords scheme="Teeft" xml:lang="en"><term>Aben</term><term>Acos</term><term>Acos algorithms</term><term>Aerosol</term><term>Aerosol retrievals</term><term>Albedo</term><term>Algorithm</term><term>Appl</term><term>Atmos</term><term>Atmospheric carbon dioxide</term><term>Atmospheric light</term><term>Belikov</term><term>Best agreement</term><term>Bias</term><term>Bremen</term><term>Bright surfaces</term><term>Bril</term><term>Butz</term><term>California institute</term><term>Carbon dioxide</term><term>Chem</term><term>Cirrus</term><term>Coincidence criteria</term><term>Coincident</term><term>Coincident observations</term><term>Data processing</term><term>Data product</term><term>Data products</term><term>Different algorithms</term><term>Dioxide</term><term>Environmental studies</term><term>Frankenberg</term><term>Garmisch</term><term>Geophys</term><term>Global bias</term><term>Good agreement</term><term>Gosat</term><term>Gosat algorithm comparison</term><term>Gosat algorithm comparison figure</term><term>Gosat data</term><term>Gosat data processing</term><term>Gosat observations</term><term>Gosat retrieval algorithms</term><term>Gosat scans</term><term>Gosat soundings</term><term>Greenhouse</term><term>Greenhouse gases</term><term>Hartmann</term><term>Hasekamp</term><term>Histogram</term><term>Inset</term><term>Irradiance</term><term>Lamont</term><term>Lamont site</term><term>Largest number</term><term>Lauder</term><term>Light path</term><term>Light path variability</term><term>Lter</term><term>Meas</term><term>Modeling</term><term>Nakajima</term><term>National institute</term><term>Northern hemisphere</term><term>Northern hemisphere sites</term><term>Ny</term><term>Optical path</term><term>Oshchepkov</term><term>Other algorithms</term><term>Photon</term><term>Phys</term><term>Posteriori</term><term>Ppdf</term><term>Ppdf parameters</term><term>Quant</term><term>Radiance spectra</term><term>Radiative</term><term>Radius circle</term><term>Regression slope</term><term>Remotec</term><term>Retrieval</term><term>Retrieval algorithm</term><term>Retrieval bias</term><term>Right column</term><term>Satellite observations</term><term>Scan</term><term>Scan counts</term><term>Seasonal variability</term><term>Single scans</term><term>Sounding</term><term>Southern hemisphere</term><term>Southern hemisphere sites</term><term>Spectral bands</term><term>Spectral variability</term><term>Spectrosc</term><term>Spectroscopic</term><term>Spectroscopic observations</term><term>Standard deviation</term><term>Statistical characteristics</term><term>Surface albedo</term><term>Surface pressure</term><term>Surface pressure bias</term><term>Tccon</term><term>Tccon data</term><term>Tccon measurements</term><term>Tccon site</term><term>Tccon sites</term><term>Tccon stations</term><term>Tccon xco2</term><term>Toon</term><term>Toon model</term><term>Total carbon column</term><term>Tsukuba</term><term>Validation</term><term>Variability</term><term>Wollongong</term><term>Wunch</term><term>Xco2</term><term>Xco2 retrievals</term><term>Yokota</term><term>Yoshida</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Aérosol</term><term>Brême</term><term>Traitement des données</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract">This report is the second in a series of companion papers describing the effects of atmospheric light scattering in observations of atmospheric carbon dioxide (CO2) by the Greenhouse gases Observing SATellite (GOSAT), in orbit since 23 January 2009. Here we summarize the retrievals from six previously published algorithms; retrieving column‐averaged dry air mole fractions of CO2 (XCO2) during 22 months of operation of GOSAT from June 2009. First, we compare data products from each algorithm with ground‐based remote sensing observations by Total Carbon Column Observing Network (TCCON). Our GOSAT‐TCCON coincidence criteria select satellite observations within a 5° radius of 11 TCCON sites. We have compared the GOSAT‐TCCON XCO2 regression slope, standard deviation, correlation and determination coefficients, and global and station‐to‐station biases. The best agreements with TCCON measurements were detected for NIES 02.xx and RemoTeC. Next, the impact of atmospheric light scattering on XCO2 retrievals was estimated for each data product using scan by scan retrievals of light path modification with the photon path length probability density function (PPDF) method. After a cloud pre‐filtering test, approximately 25% of GOSAT soundings processed by NIES 02.xx, ACOS B2.9, and UoL‐FP: 3G and 35% processed by RemoTeC were found to be contaminated by atmospheric light scattering. This study suggests that NIES 02.xx and ACOS B2.9 algorithms tend to overestimate aerosol amounts over bright surfaces, resulting in an underestimation of XCO2 for GOSAT observations. Cross‐comparison between algorithms shows that ACOS B2.9 agrees best with NIES 02.xx and UoL‐FP: 3G while RemoTeC XCO2 retrievals are in a best agreement with NIES PPDF‐D.</div></front></TEI><affiliations><list><country><li>Allemagne</li><li>Australie</li><li>Finlande</li><li>France</li><li>Japon</li><li>Nouvelle-Zélande</li><li>Pays-Bas</li><li>Royaume-Uni</li><li>États-Unis</li></country><region><li>Bade-Wurtemberg</li><li>Brême (Land)</li><li>District de Karlsruhe</li><li>Utrecht (province)</li></region><settlement><li>Brême</li><li>Karlsruhe</li><li>Utrecht</li></settlement></list><tree><country name="Japon"><noRegion><name sortKey="Oshchepkov, Sergey" sort="Oshchepkov, Sergey" uniqKey="Oshchepkov S" first="Sergey" last="Oshchepkov">Sergey Oshchepkov</name></noRegion><name sortKey="Belikov, Dmitry" sort="Belikov, Dmitry" uniqKey="Belikov D" first="Dmitry" last="Belikov">Dmitry Belikov</name><name sortKey="Bril, Andrey" sort="Bril, Andrey" uniqKey="Bril A" first="Andrey" last="Bril">Andrey Bril</name><name sortKey="Maksyutov, Shamil" sort="Maksyutov, Shamil" uniqKey="Maksyutov S" first="Shamil" last="Maksyutov">Shamil Maksyutov</name><name sortKey="Matsunaga, Tsuneo" sort="Matsunaga, Tsuneo" uniqKey="Matsunaga T" first="Tsuneo" last="Matsunaga">Tsuneo Matsunaga</name><name sortKey="Morino, Isamu" sort="Morino, Isamu" uniqKey="Morino I" first="Isamu" last="Morino">Isamu Morino</name><name sortKey="Oshchepkov, Sergey" sort="Oshchepkov, Sergey" uniqKey="Oshchepkov S" first="Sergey" last="Oshchepkov">Sergey Oshchepkov</name><name sortKey="Uchino, Osamu" sort="Uchino, Osamu" uniqKey="Uchino O" first="Osamu" last="Uchino">Osamu Uchino</name><name sortKey="Watanabe, Hiroshi" sort="Watanabe, Hiroshi" uniqKey="Watanabe H" first="Hiroshi" last="Watanabe">Hiroshi Watanabe</name><name sortKey="Yokota, Tatsuya" sort="Yokota, Tatsuya" uniqKey="Yokota T" first="Tatsuya" last="Yokota">Tatsuya Yokota</name><name sortKey="Yoshida, Yukio" sort="Yoshida, Yukio" uniqKey="Yoshida Y" first="Yukio" last="Yoshida">Yukio Yoshida</name></country><country name="États-Unis"><noRegion><name sortKey="Wennberg, Paul O" sort="Wennberg, Paul O" uniqKey="Wennberg P" first="Paul O." last="Wennberg">Paul O. Wennberg</name></noRegion><name sortKey="Crisp, David" sort="Crisp, David" uniqKey="Crisp D" first="David" last="Crisp">David Crisp</name><name sortKey="Frankenberg, Christian" sort="Frankenberg, Christian" uniqKey="Frankenberg C" first="Christian" last="Frankenberg">Christian Frankenberg</name><name sortKey="Miller, Charles E" sort="Miller, Charles E" uniqKey="Miller C" first="Charles E." last="Miller">Charles E. Miller</name><name sortKey="O Dell, Christopher W" sort="O Dell, Christopher W" uniqKey="O Dell C" first="Christopher W." last="O'Dell">Christopher W. O'Dell</name><name sortKey="Toon, Geoffrey C" sort="Toon, Geoffrey C" uniqKey="Toon G" first="Geoffrey C." last="Toon">Geoffrey C. Toon</name><name sortKey="Wunch, Debra" sort="Wunch, Debra" uniqKey="Wunch D" first="Debra" last="Wunch">Debra Wunch</name></country><country name="Australie"><noRegion><name sortKey="Deutscher, Nicholas M" sort="Deutscher, Nicholas M" uniqKey="Deutscher N" first="Nicholas M." last="Deutscher">Nicholas M. Deutscher</name></noRegion><name sortKey="Griffith, David" sort="Griffith, David" uniqKey="Griffith D" first="David" last="Griffith">David Griffith</name><name sortKey="Macatangay, Ronald" sort="Macatangay, Ronald" uniqKey="Macatangay R" first="Ronald" last="Macatangay">Ronald Macatangay</name></country><country name="Allemagne"><region name="Brême (Land)"><name sortKey="Deutscher, Nicholas M" sort="Deutscher, Nicholas M" uniqKey="Deutscher N" first="Nicholas M." last="Deutscher">Nicholas M. Deutscher</name></region><name sortKey="Butz, Andre" sort="Butz, Andre" uniqKey="Butz A" first="André" last="Butz">André Butz</name><name sortKey="Feist, Dietrich G" sort="Feist, Dietrich G" uniqKey="Feist D" first="Dietrich G." last="Feist">Dietrich G. Feist</name><name sortKey="Notholt, Justus" sort="Notholt, Justus" uniqKey="Notholt J" first="Justus" last="Notholt">Justus Notholt</name><name sortKey="Rettinger, Markus" sort="Rettinger, Markus" uniqKey="Rettinger M" first="Markus" last="Rettinger">Markus Rettinger</name><name sortKey="Sussmann, Ralf" sort="Sussmann, Ralf" uniqKey="Sussmann R" first="Ralf" last="Sussmann">Ralf Sussmann</name></country><country name="Pays-Bas"><region name="Utrecht (province)"><name sortKey="Aben, Ilse" sort="Aben, Ilse" uniqKey="Aben I" first="Ilse" last="Aben">Ilse Aben</name></region><name sortKey="Guerlet, Sandrine" sort="Guerlet, Sandrine" uniqKey="Guerlet S" first="Sandrine" last="Guerlet">Sandrine Guerlet</name><name sortKey="Hasekamp, Otto" sort="Hasekamp, Otto" uniqKey="Hasekamp O" first="Otto" last="Hasekamp">Otto Hasekamp</name></country><country name="Royaume-Uni"><noRegion><name sortKey="Boesch, Hartmut" sort="Boesch, Hartmut" uniqKey="Boesch H" first="Hartmut" last="Boesch">Hartmut Boesch</name></noRegion><name sortKey="Cogan, Austin" sort="Cogan, Austin" uniqKey="Cogan A" first="Austin" last="Cogan">Austin Cogan</name><name sortKey="Parker, Robert" sort="Parker, Robert" uniqKey="Parker R" first="Robert" last="Parker">Robert Parker</name></country><country name="Nouvelle-Zélande"><noRegion><name sortKey="Sherlock, Vanessa" sort="Sherlock, Vanessa" uniqKey="Sherlock V" first="Vanessa" last="Sherlock">Vanessa Sherlock</name></noRegion><name sortKey="Robinson, John" sort="Robinson, John" uniqKey="Robinson J" first="John" last="Robinson">John Robinson</name></country><country name="Finlande"><noRegion><name sortKey="Kyro, Esko" sort="Kyro, Esko" uniqKey="Kyro E" first="Esko" last="Kyrö">Esko Kyrö</name></noRegion><name sortKey="Heikkinen, Pauli" sort="Heikkinen, Pauli" uniqKey="Heikkinen P" first="Pauli" last="Heikkinen">Pauli Heikkinen</name></country><country name="France"><noRegion><name sortKey="Kadygrov, Nikolay" sort="Kadygrov, Nikolay" uniqKey="Kadygrov N" first="Nikolay" last="Kadygrov">Nikolay Kadygrov</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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