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Global-scale assessment and inter-comparison of recently developed/reprocessed microwave satellite vegetation optical depth products

hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorLI, Xiaojun
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorWIGNERON, Jean-Pierre
hal.structure.identifierLaboratoire d'études en Géophysique et océanographie spatiales [LEGOS]
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorFRAPPART, Frédéric
hal.structure.identifierNanjing University of Information Science and Technology [NUIST]
dc.contributor.authorFAN, Lei
hal.structure.identifierLaboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE]
hal.structure.identifierICOS-ATC [ICOS-ATC]
dc.contributor.authorCIAIS, Philippe
hal.structure.identifierDepartment of Geosciences and Natural Resource Management [Copenhagen] [IGN]
dc.contributor.authorFENSHOLT, Rasmus
hal.structure.identifierMIT Parsons Laboratory
dc.contributor.authorENTEKHABI, Dara
hal.structure.identifierDepartment of Geosciences and Natural Resource Management [Copenhagen] [IGN]
dc.contributor.authorBRANDT, Martin
hal.structure.identifierStanford University
dc.contributor.authorKONINGS, Alexandra
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorLIU, Xiangzhuo
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
hal.structure.identifierBeijing Normal University [BNU]
dc.contributor.authorWANG, Mengjia
hal.structure.identifierMilieux Environnementaux, Transferts et Interactions dans les hydrosystèmes et les Sols [METIS]
dc.contributor.authorAL-YAARI, Amen
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorMOISY, Christophe
dc.date.accessioned2024-04-08T11:45:11Z
dc.date.available2024-04-08T11:45:11Z
dc.date.issued2021-02
dc.identifier.issn0034-4257
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/195184
dc.description.abstractEnThe vegetation optical depth (VOD), a vegetation index retrieved from passive or active microwave remote sensing systems, is related to the intensity of microwave extinction effects within the vegetation canopy layer. This index is only marginally impacted by effects from atmosphere, clouds and sun illumination, and thus increasingly used for ecological applications at large scales. Newly released VOD products show different abilities in monitoring vegetation features, depending on the algorithm used and the satellite frequency. VOD is increasingly sensitive to the upper vegetation layer as the frequency increases (from L-, C- to X-band), offering different capacities to monitor seasonal changes of the leafy and/or woody vegetation components, vegetation water status and aboveground biomass. This study evaluated nine recently developed/reprocessed VOD products from the AMSR2, SMOS and SMAP space-borne instruments for monitoring structural vegetation features related to phenology, height and aboveground biomass. For monitoring the seasonality of green vegetation (herbaceous and woody foliage), we found that X-VOD products, particularly from the LPDR-retrieval algorithm, outperformed the other VOD products in regions that are not densely vegetated, where they showed higher temporal correlation values with optical vegetation indices (VIs). However, LPDR X-VOD time series failed to detect changes in VOD after rainfall events whereas most other VOD products could do so, and overall daily variations are less pronounced in LPDR X-VOD. Results show that the reprocessed VODCA C- and X-VOD have almost comparable performance and VODCA C-VOD correlates better with VIs than other C-VOD products. Low frequency L-VOD, particularly the new version (V2) of SMOS-IC, show a higher temporal correlation with VIs, similar to C-VOD, in medium-densely vegetated biomes such as savannas (R ~ 0.70) than for other short vegetation types. Because the L-VOD indices are more sensitive to the non-green vegetation components (trunks and branches) than higher frequency products, they are well-correlated with aboveground biomass: (R ~ 0.91) across space between predicted and observed values for both SMOS-IC V2 and SMAP MT-DCA. However, when compared with forest canopy height, results at L-band are not systematically better than C- and X-VOD products. This revealed specific VOD retrieval issues for some ecosystems, e.g., boreal regions. It is expected that these findings can contribute to algorithm refinements, product enhancements and further developing the use of VOD for monitoring above-ground vegetation biomass, vegetation dynamics and phenology.
dc.language.isoen
dc.publisherElsevier
dc.rights.urihttp://creativecommons.org/licenses/by-nc/
dc.subject.enVegetation optical depth
dc.subject.enSMOS-IC
dc.subject.enSMAP MT-DCA
dc.subject.enLPDR
dc.subject.enLPRM
dc.subject.enVODCA
dc.subject.enBiomass
dc.subject.enPhenology
dc.subject.enHeight of vegetation
dc.subject.enVegetation cycle
dc.title.enGlobal-scale assessment and inter-comparison of recently developed/reprocessed microwave satellite vegetation optical depth products
dc.typeArticle de revue
dc.identifier.doi10.1016/j.rse.2020.112208
dc.subject.halSciences de l'environnement
bordeaux.journalRemote Sensing of Environment
bordeaux.page1-19
bordeaux.volume253
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-03121281
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03121281v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Remote%20Sensing%20of%20Environment&rft.date=2021-02&rft.volume=253&rft.spage=1-19&rft.epage=1-19&rft.eissn=0034-4257&rft.issn=0034-4257&rft.au=LI,%20Xiaojun&WIGNERON,%20Jean-Pierre&FRAPPART,%20Fr%C3%A9d%C3%A9ric&FAN,%20Lei&CIAIS,%20Philippe&rft.genre=article


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