An independent component analysis filtering approach for estimating continental hydrology in the GRACE gravity data
Identifieur interne : 006D44 ( Main/Exploration ); précédent : 006D43; suivant : 006D45An independent component analysis filtering approach for estimating continental hydrology in the GRACE gravity data
Auteurs : Frédéric Frappart [France] ; Guillaume Ramillien [France] ; Marc Leblanc [Australie] ; Sarah O. Tweed [Australie] ; Marie-Paule Bonnet [France] ; Philippe Maisongrande [France]Source :
- Remote sensing of environment [ 0034-4257 ] ; 2011.
Descripteurs français
- Pascal (Inist)
- Analyse composante indépendante, Filtrage, Hydrologie, Gravité, Donnée, Satellite, Solution, Signal, Ondulation, Filtre, Utilisation, Inverse, Composante, Champ gravimétrique, Indépendance, Masse eau, Carte monde, Stockage eau, 2002, 2009, Monde, Mesure in situ, Série temporelle, Eau, Méthode, Bassin Murray Darling, Australie.
- Wicri :
- geographic : Australie.
- topic : Hydrologie, Satellite, Eau.
English descriptors
- KwdEn :
- 2002, 2009, Australia, Filter, Gravity, Independence, Independent component analysis, Inverse, Measurement in situ, Method, Time series, Water mass, components, data, filtering, global, global maps, gravity field, hydrology, satellites, signals, solution, undulation, utilization, water, water storage.
Abstract
An approach based on Independent Component Analysis (ICA) has been applied on a combination of monthly GRACE satellite solutions computed from official providers (CSR, JPL and GFZ), to separate useful geophysical signals from important striping undulations. We pre-filtered the raw GRACE Level-2 solutions using Gaussian filters of 300, 400, 500-km of radius to verify the non-Gaussianity condition which is necessary to apply the ICA. This linear inverse approach ensures to separate components of the observed gravity field which are statistically independent. The most energetic component found by ICA corresponds mainly to the contribution of continental water mass change. Series of ICA-estimated global maps of continental water storage have been produced over 08/2002-07/2009. Our ICA estimates were compared with the solutions obtained using other post-processing of GRACE Level-2 data, such as destriping and Gaussian filtering, at global and basin scales. Besides, they have been validated with in situ measurements in the Murray-Darling Basin. Our computed ICA grids are consistent with the different approaches. Moreover, the ICA-derived time series of water masses showed less north-south spurious gravity signals and improved filtering of unrealistic hydrological features at the basin-scale compared with solutions obtained using other filtering methods.
Affiliations:
Links toward previous steps (curation, corpus...)
- to stream PascalFrancis, to step Corpus: 001D69
- to stream PascalFrancis, to step Curation: 004172
- to stream PascalFrancis, to step Checkpoint: 001D56
- to stream Main, to step Merge: 007207
- to stream Main, to step Curation: 006D44
Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">An independent component analysis filtering approach for estimating continental hydrology in the GRACE gravity data</title>
<author><name sortKey="Frappart, Frederic" sort="Frappart, Frederic" uniqKey="Frappart F" first="Frédéric" last="Frappart">Frédéric Frappart</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Université de Toulouse, UPS, OMP, LMTG, 14 Avenue Edouard Belin</s1>
<s2>31400 Toulouse</s2>
<s3>FRA</s3>
<sZ>1 aut.</sZ>
<sZ>5 aut.</sZ>
</inist:fA14>
<country>France</country>
<wicri:noRegion>31400 Toulouse</wicri:noRegion>
<placeName><settlement type="city">Toulouse</settlement>
<region type="region" nuts="2">Occitanie (région administrative)</region>
<region type="old region" nuts="2">Midi-Pyrénées</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Ramillien, Guillaume" sort="Ramillien, Guillaume" uniqKey="Ramillien G" first="Guillaume" last="Ramillien">Guillaume Ramillien</name>
<affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Université de Toulouse, UPS, OMP, DTP, 14 Avenue Edouard Belin</s1>
<s2>31400 Toulouse</s2>
<s3>FRA</s3>
<sZ>2 aut.</sZ>
</inist:fA14>
<country>France</country>
<wicri:noRegion>31400 Toulouse</wicri:noRegion>
<placeName><settlement type="city">Toulouse</settlement>
<region type="region" nuts="2">Occitanie (région administrative)</region>
<region type="old region" nuts="2">Midi-Pyrénées</region>
</placeName>
</affiliation>
<affiliation wicri:level="1"><inist:fA14 i1="03"><s1>CNRS, OMP, DTP, 14 Avenue Edouard Belin</s1>
<s2>31400 Toulouse</s2>
<s3>FRA</s3>
<sZ>2 aut.</sZ>
</inist:fA14>
<country>France</country>
<wicri:noRegion>31400 Toulouse</wicri:noRegion>
<placeName><settlement type="city">Toulouse</settlement>
<region type="region" nuts="2">Occitanie (région administrative)</region>
<region type="old region" nuts="2">Midi-Pyrénées</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Leblanc, Marc" sort="Leblanc, Marc" uniqKey="Leblanc M" first="Marc" last="Leblanc">Marc Leblanc</name>
<affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Hydrological Sciences Research Unit, School of Earth and Environmental Sciences, James Cook University</s1>
<s2>Cairns, Queensland</s2>
<s3>AUS</s3>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
</inist:fA14>
<country>Australie</country>
<wicri:noRegion>Cairns, Queensland</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Tweed, Sarah O" sort="Tweed, Sarah O" uniqKey="Tweed S" first="Sarah O." last="Tweed">Sarah O. Tweed</name>
<affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Hydrological Sciences Research Unit, School of Earth and Environmental Sciences, James Cook University</s1>
<s2>Cairns, Queensland</s2>
<s3>AUS</s3>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
</inist:fA14>
<country>Australie</country>
<wicri:noRegion>Cairns, Queensland</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Bonnet, Marie Paule" sort="Bonnet, Marie Paule" uniqKey="Bonnet M" first="Marie-Paule" last="Bonnet">Marie-Paule Bonnet</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Université de Toulouse, UPS, OMP, LMTG, 14 Avenue Edouard Belin</s1>
<s2>31400 Toulouse</s2>
<s3>FRA</s3>
<sZ>1 aut.</sZ>
<sZ>5 aut.</sZ>
</inist:fA14>
<country>France</country>
<wicri:noRegion>31400 Toulouse</wicri:noRegion>
<placeName><settlement type="city">Toulouse</settlement>
<region type="region" nuts="2">Occitanie (région administrative)</region>
<region type="old region" nuts="2">Midi-Pyrénées</region>
</placeName>
</affiliation>
<affiliation wicri:level="1"><inist:fA14 i1="05"><s1>IRD, OMP, LMTG, 14 Avenue Edouard Belin</s1>
<s2>31400 Toulouse</s2>
<s3>FRA</s3>
<sZ>5 aut.</sZ>
</inist:fA14>
<country>France</country>
<wicri:noRegion>31400 Toulouse</wicri:noRegion>
<placeName><settlement type="city">Toulouse</settlement>
<region type="region" nuts="2">Occitanie (région administrative)</region>
<region type="old region" nuts="2">Midi-Pyrénées</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Maisongrande, Philippe" sort="Maisongrande, Philippe" uniqKey="Maisongrande P" first="Philippe" last="Maisongrande">Philippe Maisongrande</name>
<affiliation wicri:level="1"><inist:fA14 i1="06"><s1>Université de Toulouse, UPS, OMP, LEGOS, 14 Avenue Edouard Belin</s1>
<s2>31400 Toulouse</s2>
<s3>FRA</s3>
<sZ>6 aut.</sZ>
</inist:fA14>
<country>France</country>
<wicri:noRegion>31400 Toulouse</wicri:noRegion>
<placeName><settlement type="city">Toulouse</settlement>
<region type="region" nuts="2">Occitanie (région administrative)</region>
<region type="old region" nuts="2">Midi-Pyrénées</region>
</placeName>
</affiliation>
<affiliation wicri:level="1"><inist:fA14 i1="07"><s1>CNES, 18 Avenue Edouard Belin</s1>
<s2>31400 Toulouse</s2>
<s3>FRA</s3>
<sZ>6 aut.</sZ>
</inist:fA14>
<country>France</country>
<wicri:noRegion>31400 Toulouse</wicri:noRegion>
<placeName><settlement type="city">Toulouse</settlement>
<region type="region" nuts="2">Occitanie (région administrative)</region>
<region type="old region" nuts="2">Midi-Pyrénées</region>
</placeName>
</affiliation>
</author>
</titleStmt>
<publicationStmt><idno type="wicri:source">INIST</idno>
<idno type="inist">11-0231429</idno>
<date when="2011">2011</date>
<idno type="stanalyst">PASCAL 11-0231429 INIST</idno>
<idno type="RBID">Pascal:11-0231429</idno>
<idno type="wicri:Area/PascalFrancis/Corpus">001D69</idno>
<idno type="wicri:Area/PascalFrancis/Curation">004172</idno>
<idno type="wicri:Area/PascalFrancis/Checkpoint">001D56</idno>
<idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">001D56</idno>
<idno type="wicri:doubleKey">0034-4257:2011:Frappart F:an:independent:component</idno>
<idno type="wicri:Area/Main/Merge">007207</idno>
<idno type="wicri:Area/Main/Curation">006D44</idno>
<idno type="wicri:Area/Main/Exploration">006D44</idno>
</publicationStmt>
<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">An independent component analysis filtering approach for estimating continental hydrology in the GRACE gravity data</title>
<author><name sortKey="Frappart, Frederic" sort="Frappart, Frederic" uniqKey="Frappart F" first="Frédéric" last="Frappart">Frédéric Frappart</name>
<affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Université de Toulouse, UPS, OMP, LMTG, 14 Avenue Edouard Belin</s1>
<s2>31400 Toulouse</s2>
<s3>FRA</s3>
<sZ>1 aut.</sZ>
<sZ>5 aut.</sZ>
</inist:fA14>
<country>France</country>
<placeName><region type="region" nuts="2">Occitanie (région administrative)</region>
<region type="old region" nuts="2">Midi-Pyrénées</region>
<settlement type="city">Toulouse</settlement>
</placeName>
</affiliation>
</author>
<author><name sortKey="Ramillien, Guillaume" sort="Ramillien, Guillaume" uniqKey="Ramillien G" first="Guillaume" last="Ramillien">Guillaume Ramillien</name>
<affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Université de Toulouse, UPS, OMP, DTP, 14 Avenue Edouard Belin</s1>
<s2>31400 Toulouse</s2>
<s3>FRA</s3>
<sZ>2 aut.</sZ>
</inist:fA14>
<country>France</country>
<placeName><region type="region" nuts="2">Occitanie (région administrative)</region>
<region type="old region" nuts="2">Midi-Pyrénées</region>
<settlement type="city">Toulouse</settlement>
</placeName>
</affiliation>
<affiliation wicri:level="3"><inist:fA14 i1="03"><s1>CNRS, OMP, DTP, 14 Avenue Edouard Belin</s1>
<s2>31400 Toulouse</s2>
<s3>FRA</s3>
<sZ>2 aut.</sZ>
</inist:fA14>
<country>France</country>
<placeName><region type="region" nuts="2">Occitanie (région administrative)</region>
<region type="old region" nuts="2">Midi-Pyrénées</region>
<settlement type="city">Toulouse</settlement>
</placeName>
</affiliation>
</author>
<author><name sortKey="Leblanc, Marc" sort="Leblanc, Marc" uniqKey="Leblanc M" first="Marc" last="Leblanc">Marc Leblanc</name>
<affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Hydrological Sciences Research Unit, School of Earth and Environmental Sciences, James Cook University</s1>
<s2>Cairns, Queensland</s2>
<s3>AUS</s3>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
</inist:fA14>
<country>Australie</country>
<wicri:noRegion>Cairns, Queensland</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Tweed, Sarah O" sort="Tweed, Sarah O" uniqKey="Tweed S" first="Sarah O." last="Tweed">Sarah O. Tweed</name>
<affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Hydrological Sciences Research Unit, School of Earth and Environmental Sciences, James Cook University</s1>
<s2>Cairns, Queensland</s2>
<s3>AUS</s3>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
</inist:fA14>
<country>Australie</country>
<wicri:noRegion>Cairns, Queensland</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Bonnet, Marie Paule" sort="Bonnet, Marie Paule" uniqKey="Bonnet M" first="Marie-Paule" last="Bonnet">Marie-Paule Bonnet</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Université de Toulouse, UPS, OMP, LMTG, 14 Avenue Edouard Belin</s1>
<s2>31400 Toulouse</s2>
<s3>FRA</s3>
<sZ>1 aut.</sZ>
<sZ>5 aut.</sZ>
</inist:fA14>
<country>France</country>
<wicri:noRegion>31400 Toulouse</wicri:noRegion>
<placeName><settlement type="city">Toulouse</settlement>
<region type="region" nuts="2">Occitanie (région administrative)</region>
<region type="old region" nuts="2">Midi-Pyrénées</region>
</placeName>
</affiliation>
<affiliation wicri:level="1"><inist:fA14 i1="05"><s1>IRD, OMP, LMTG, 14 Avenue Edouard Belin</s1>
<s2>31400 Toulouse</s2>
<s3>FRA</s3>
<sZ>5 aut.</sZ>
</inist:fA14>
<country>France</country>
<wicri:noRegion>31400 Toulouse</wicri:noRegion>
<placeName><settlement type="city">Toulouse</settlement>
<region type="region" nuts="2">Occitanie (région administrative)</region>
<region type="old region" nuts="2">Midi-Pyrénées</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Maisongrande, Philippe" sort="Maisongrande, Philippe" uniqKey="Maisongrande P" first="Philippe" last="Maisongrande">Philippe Maisongrande</name>
<affiliation wicri:level="1"><inist:fA14 i1="06"><s1>Université de Toulouse, UPS, OMP, LEGOS, 14 Avenue Edouard Belin</s1>
<s2>31400 Toulouse</s2>
<s3>FRA</s3>
<sZ>6 aut.</sZ>
</inist:fA14>
<country>France</country>
<wicri:noRegion>31400 Toulouse</wicri:noRegion>
<placeName><settlement type="city">Toulouse</settlement>
<region type="region" nuts="2">Occitanie (région administrative)</region>
<region type="old region" nuts="2">Midi-Pyrénées</region>
</placeName>
</affiliation>
<affiliation wicri:level="1"><inist:fA14 i1="07"><s1>CNES, 18 Avenue Edouard Belin</s1>
<s2>31400 Toulouse</s2>
<s3>FRA</s3>
<sZ>6 aut.</sZ>
</inist:fA14>
<country>France</country>
<wicri:noRegion>31400 Toulouse</wicri:noRegion>
<placeName><settlement type="city">Toulouse</settlement>
<region type="region" nuts="2">Occitanie (région administrative)</region>
<region type="old region" nuts="2">Midi-Pyrénées</region>
</placeName>
</affiliation>
</author>
</analytic>
<series><title level="j" type="main">Remote sensing of environment</title>
<title level="j" type="abbreviated">Remote sens. environ.</title>
<idno type="ISSN">0034-4257</idno>
<imprint><date when="2011">2011</date>
</imprint>
</series>
</biblStruct>
</sourceDesc>
<seriesStmt><title level="j" type="main">Remote sensing of environment</title>
<title level="j" type="abbreviated">Remote sens. environ.</title>
<idno type="ISSN">0034-4257</idno>
</seriesStmt>
</fileDesc>
<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>2002</term>
<term>2009</term>
<term>Australia</term>
<term>Filter</term>
<term>Gravity</term>
<term>Independence</term>
<term>Independent component analysis</term>
<term>Inverse</term>
<term>Measurement in situ</term>
<term>Method</term>
<term>Time series</term>
<term>Water mass</term>
<term>components</term>
<term>data</term>
<term>filtering</term>
<term>global</term>
<term>global maps</term>
<term>gravity field</term>
<term>hydrology</term>
<term>satellites</term>
<term>signals</term>
<term>solution</term>
<term>undulation</term>
<term>utilization</term>
<term>water</term>
<term>water storage</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Analyse composante indépendante</term>
<term>Filtrage</term>
<term>Hydrologie</term>
<term>Gravité</term>
<term>Donnée</term>
<term>Satellite</term>
<term>Solution</term>
<term>Signal</term>
<term>Ondulation</term>
<term>Filtre</term>
<term>Utilisation</term>
<term>Inverse</term>
<term>Composante</term>
<term>Champ gravimétrique</term>
<term>Indépendance</term>
<term>Masse eau</term>
<term>Carte monde</term>
<term>Stockage eau</term>
<term>2002</term>
<term>2009</term>
<term>Monde</term>
<term>Mesure in situ</term>
<term>Série temporelle</term>
<term>Eau</term>
<term>Méthode</term>
<term>Bassin Murray Darling</term>
<term>Australie</term>
</keywords>
<keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>Australie</term>
</keywords>
<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Hydrologie</term>
<term>Satellite</term>
<term>Eau</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en">An approach based on Independent Component Analysis (ICA) has been applied on a combination of monthly GRACE satellite solutions computed from official providers (CSR, JPL and GFZ), to separate useful geophysical signals from important striping undulations. We pre-filtered the raw GRACE Level-2 solutions using Gaussian filters of 300, 400, 500-km of radius to verify the non-Gaussianity condition which is necessary to apply the ICA. This linear inverse approach ensures to separate components of the observed gravity field which are statistically independent. The most energetic component found by ICA corresponds mainly to the contribution of continental water mass change. Series of ICA-estimated global maps of continental water storage have been produced over 08/2002-07/2009. Our ICA estimates were compared with the solutions obtained using other post-processing of GRACE Level-2 data, such as destriping and Gaussian filtering, at global and basin scales. Besides, they have been validated with in situ measurements in the Murray-Darling Basin. Our computed ICA grids are consistent with the different approaches. Moreover, the ICA-derived time series of water masses showed less north-south spurious gravity signals and improved filtering of unrealistic hydrological features at the basin-scale compared with solutions obtained using other filtering methods.</div>
</front>
</TEI>
<affiliations><list><country><li>Australie</li>
<li>France</li>
</country>
<region><li>Midi-Pyrénées</li>
<li>Occitanie (région administrative)</li>
</region>
<settlement><li>Toulouse</li>
</settlement>
</list>
<tree><country name="France"><region name="Occitanie (région administrative)"><name sortKey="Frappart, Frederic" sort="Frappart, Frederic" uniqKey="Frappart F" first="Frédéric" last="Frappart">Frédéric Frappart</name>
</region>
<name sortKey="Bonnet, Marie Paule" sort="Bonnet, Marie Paule" uniqKey="Bonnet M" first="Marie-Paule" last="Bonnet">Marie-Paule Bonnet</name>
<name sortKey="Bonnet, Marie Paule" sort="Bonnet, Marie Paule" uniqKey="Bonnet M" first="Marie-Paule" last="Bonnet">Marie-Paule Bonnet</name>
<name sortKey="Maisongrande, Philippe" sort="Maisongrande, Philippe" uniqKey="Maisongrande P" first="Philippe" last="Maisongrande">Philippe Maisongrande</name>
<name sortKey="Maisongrande, Philippe" sort="Maisongrande, Philippe" uniqKey="Maisongrande P" first="Philippe" last="Maisongrande">Philippe Maisongrande</name>
<name sortKey="Ramillien, Guillaume" sort="Ramillien, Guillaume" uniqKey="Ramillien G" first="Guillaume" last="Ramillien">Guillaume Ramillien</name>
<name sortKey="Ramillien, Guillaume" sort="Ramillien, Guillaume" uniqKey="Ramillien G" first="Guillaume" last="Ramillien">Guillaume Ramillien</name>
</country>
<country name="Australie"><noRegion><name sortKey="Leblanc, Marc" sort="Leblanc, Marc" uniqKey="Leblanc M" first="Marc" last="Leblanc">Marc Leblanc</name>
</noRegion>
<name sortKey="Tweed, Sarah O" sort="Tweed, Sarah O" uniqKey="Tweed S" first="Sarah O." last="Tweed">Sarah O. Tweed</name>
</country>
</tree>
</affiliations>
</record>
Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Asie/explor/AustralieFrV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 006D44 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 006D44 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien |wiki= Wicri/Asie |area= AustralieFrV1 |flux= Main |étape= Exploration |type= RBID |clé= Pascal:11-0231429 |texte= An independent component analysis filtering approach for estimating continental hydrology in the GRACE gravity data }}
![]() | This area was generated with Dilib version V0.6.33. | ![]() |