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dc.contributor.authorZampieri, Matteo
dc.contributor.authorSerpetzoglou, Efthymios
dc.contributor.authorAnagnostou, Emmanouil N.
dc.contributor.authorNikolopoulos, Efthymios I.
dc.contributor.authorPapadopoulos, Anastasios
dc.date.accessioned2015-08-03T09:44:15Z
dc.date.available2015-08-03T09:44:15Z
dc.date.issued2012-02
dc.identifier.issn00221694
dc.identifier.doi10.1016/j.jhydrol.2011.11.041
dc.identifier.urihttp://hdl.handle.net/10754/562076
dc.description.abstractGroundwater is an important component of the hydrological cycle, included in many land surface models to provide a lower boundary condition for soil moisture, which in turn plays a key role in the land-vegetation-atmosphere interactions and the ecosystem dynamics. In regional-scale climate applications land surface models (LSMs) are commonly coupled to atmospheric models to close the surface energy, mass and carbon balance. LSMs in these applications are used to resolve the momentum, heat, water and carbon vertical fluxes, accounting for the effect of vegetation, soil type and other surface parameters, while lack of adequate resolution prevents using them to resolve horizontal sub-grid processes. Specifically, LSMs resolve the large-scale runoff production associated with infiltration excess and sub-grid groundwater convergence, but they neglect the effect from loosing streams to groundwater. Through the analysis of observed data of soil moisture obtained from the Oklahoma Mesoscale Network stations and land surface temperature derived from MODIS we provide evidence that the regional scale soil moisture and surface temperature patterns are affected by the rivers. This is demonstrated on the basis of simulations from a land surface model (i.e., Community Land Model - CLM, version 3.5). We show that the model cannot reproduce the features of the observed soil moisture and temperature spatial patterns that are related to the underlying mechanism of reinfiltration of river water to groundwater. Therefore, we implement a simple parameterization of this process in CLM showing the ability to reproduce the soil moisture and surface temperature spatial variabilities that relate to the river distribution at regional scale. The CLM with this new parameterization is used to evaluate impacts of the improved representation of river-groundwater interactions on the simulated water cycle parameters and the surface energy budget at the regional scale. © 2011 Elsevier B.V.
dc.description.sponsorshipThis work was supported by an EU Marie Curie Excellence Grant (Project PreWEC, MEXT-CT-2006-038331). The authors would like to thank Viviana Maggioni for her help in preprocessing the observed data and Gonzalo Miguez Macho for his valuable comments and suggestions.
dc.publisherElsevier BV
dc.subjectCommunity Land Model
dc.subjectGroundwater
dc.subjectRegional hydrological model
dc.subjectRivers feedback
dc.subjectSoil moisture
dc.subjectTOPMODEL
dc.titleImproving the representation of river-groundwater interactions in land surface modeling at the regional scale: Observational evidence and parameterization applied in the Community Land Model
dc.typeArticle
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalJournal of Hydrology
dc.contributor.institutionInstitute of Inland Waters, Hellenic Center for Marine Research, Anavissos, Greece
dc.contributor.institutionDepartment of Meteorology and Climatology, School of Geology, Aristotle University of Thessaloniki, Thessaloniki, Greece
dc.contributor.institutionUniversity of Connecticut, Storrs, United States
kaust.personZampieri, Matteo


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