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dc.contributor.authorMontzka, Carsten
dc.contributor.authorBogena, Heye
dc.contributor.authorZreda, Marek
dc.contributor.authorMonerris, Alessandra
dc.contributor.authorMorrison, Ross
dc.contributor.authorMuddu, Sekhar
dc.contributor.authorVereecken, Harry
dc.date.accessioned2017-04-25T23:43:16Z
dc.date.available2017-04-25T23:43:16Z
dc.date.issued2017-01-25
dc.identifier.citationValidation of Spaceborne and Modelled Surface Soil Moisture Products with Cosmic-Ray Neutron Probes 2017, 9 (2):103 Remote Sensingen
dc.identifier.issn2072-4292
dc.identifier.doi10.3390/rs9020103
dc.identifier.urihttp://hdl.handle.net/10150/623251
dc.description.abstract]The scale difference between point in situ soil moisture measurements and low resolution satellite products limits the quality of any validation efforts in heterogeneous regions. Cosmic Ray Neutron Probes (CRNP) could be an option to fill the scale gap between both systems, as they provide area-average soil moisture within a 150-250 m radius footprint. In this study, we evaluate differences and similarities between CRNP observations, and surface soil moisture products from the Advanced Microwave Scanning Radiometer 2 (AMSR2), the METOP-A/B Advanced Scatterometer (ASCAT), the Soil Moisture Active and Passive (SMAP), the Soil Moisture and Ocean Salinity (SMOS), as well as simulations from the Global Land Data Assimilation System Version 2 (GLDAS2). Six CRNPs located on five continents have been selected as test sites: the Rur catchment in Germany, the COSMOS sites in Arizona and California (USA), and Kenya, one CosmOz site in New SouthWales (Australia), and a site in Karnataka (India). Standard validation scores as well as the Triple Collocation (TC) method identified SMAP to provide a high accuracy soil moisture product with low noise or uncertainties as compared to CRNPs. The potential of CRNPs for satellite soil moisture validation has been proven; however, biomass correction methods should be implemented to improve its application in regions with large vegetation dynamics.
dc.description.sponsorshipHelmholtz-Alliance on "Remote Sensing and Earth System Dynamics"; BelSPO STEREO III HYDRAS+ project; TERENO (Terrestrial Environmental Observatories) - German Federal Ministry of Education and Research (BMBF); US National Science Foundation [ATM-0838491, LTREB 08-16453]; CSIRO; UK National Environment Research Council; Indian Institute of Scienceen
dc.language.isoenen
dc.publisherMDPI AGen
dc.relation.urlhttp://www.mdpi.com/2072-4292/9/2/103en
dc.rightsThis is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).en
dc.subjectcosmic-ray neutron probeen
dc.subjectSMOSen
dc.subjectSMAPen
dc.subjectASCATen
dc.subjectAMSR2en
dc.subjectGLDAS2en
dc.subjectCOSMOSen
dc.subjectCosmOzen
dc.subjectsoil moistureen
dc.subjectsoil water contenten
dc.subjectvalidationen
dc.subjecttriple collocationen
dc.titleValidation of Spaceborne and Modelled Surface Soil Moisture Products with Cosmic-Ray Neutron Probesen
dc.typeArticleen
dc.contributor.departmentUniv Arizona, Dept Hydrol & Atmospher Scien
dc.identifier.journalRemote Sensingen
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en
dc.eprint.versionFinal published versionen
refterms.dateFOA2018-06-16T02:36:21Z
html.description.abstract]The scale difference between point in situ soil moisture measurements and low resolution satellite products limits the quality of any validation efforts in heterogeneous regions. Cosmic Ray Neutron Probes (CRNP) could be an option to fill the scale gap between both systems, as they provide area-average soil moisture within a 150-250 m radius footprint. In this study, we evaluate differences and similarities between CRNP observations, and surface soil moisture products from the Advanced Microwave Scanning Radiometer 2 (AMSR2), the METOP-A/B Advanced Scatterometer (ASCAT), the Soil Moisture Active and Passive (SMAP), the Soil Moisture and Ocean Salinity (SMOS), as well as simulations from the Global Land Data Assimilation System Version 2 (GLDAS2). Six CRNPs located on five continents have been selected as test sites: the Rur catchment in Germany, the COSMOS sites in Arizona and California (USA), and Kenya, one CosmOz site in New SouthWales (Australia), and a site in Karnataka (India). Standard validation scores as well as the Triple Collocation (TC) method identified SMAP to provide a high accuracy soil moisture product with low noise or uncertainties as compared to CRNPs. The potential of CRNPs for satellite soil moisture validation has been proven; however, biomass correction methods should be implemented to improve its application in regions with large vegetation dynamics.


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