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dc.contributor.authorManz, B.
dc.contributor.authorPáez-Bimos, S.
dc.contributor.authorHorna, N.
dc.contributor.authorBuytaert, W.
dc.contributor.authorOchoa-Tocachi, v
dc.contributor.authorLavado-Casimiro, W.
dc.contributor.authorWillems, B.
dc.date.accessioned2019-07-27T19:14:25Z
dc.date.available2019-07-27T19:14:25Z
dc.date.issued2017-09
dc.identifier.urihttps://hdl.handle.net/20.500.12542/85
dc.description.abstractAn initial ground validation of the Integrated Multisatellite Retrievals for GPM (IMERG) Day-1 product from March 2014 to August 2015 is presented for the tropical Andes. IMERG was evaluated along with the Tropical Rainfall Measuring Mission (TRMM) Multisatellite Precipitation Analysis (TMPA) against 302 quality-controlled rain gauges across Ecuador and Peru. Detection, quantitative estimation statistics, and probability distribution functions are calculated at different spatial (0.1°, 0.25°) and temporal (1 h, 3 h, daily) scales. Precipitation products are analyzed for hydrometeorologically distinct subregions. Results show that IMERG has a superior detection and quantitative rainfall intensity estimation ability than TMPA, particularly in the high Andes. Despite slightly weaker agreement of mean rainfall fields, IMERG shows better characterization of gauge observations when separating rainfall detection and rainfall rate estimation. At corresponding space-time scales, IMERG shows better estimation of gauge rainfall probability distributions than TMPA. However, IMERG shows no improvement in both rainfall detection and rainfall rate estimation along the dry Peruvian coastline, where major random and systematic errors persist. Further research is required to identify which rainfall intensities are missed or falsely detected and how errors can be attributed to specific satellite sensor retrievals. The satellite-gauge difference was associated with the point-area difference in spatial support between gauges and satellite precipitation products, particularly in areas with low and irregular gauge network coverage. Future satellite-gauge evaluations need to identify such locations and investigate more closely interpixel point-area differences before attributing uncertainties to satellite products.en_US
dc.language.isoengen_US
dc.publisherAmerican Meteorological Societyen_US
dc.relation.ispartofurn:issn:1525-755X
dc.rightsinfo:eu-repo/semantics/openAccesses_PE
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/3.0/us/*
dc.sourceServicio Nacional de Meteorología e Hidrología del Perúes_PE
dc.sourceRepositorio Institucional - SENAMHIes_PE
dc.subjectComplex terrainen_US
dc.subjectError analysisen_US
dc.subjectPrecipitationen_US
dc.subjectSatellite observationsen_US
dc.subjectSouth Americaen_US
dc.titleComparative ground validation of IMERG and TMPA at variable spatiotemporal scales in the tropical Andesen_US
dc.typeinfo:eu-repo/semantics/articleen_US
dc.identifier.isni0000 0001 0746 0446
dc.description.peerreviewPor pares
dc.identifier.doihttps://doi.org/10.1175/JHM-D-16-0277.1
dc.source.volume18es_PE
dc.source.issue9es_PE
dc.source.initialpage2469es_PE
dc.source.endpage2489es_PE
dc.source.journalJournal of Hydrometeorologyes_PE


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