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Spatial and temporal variability of surface temperature of a forest canopy

hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorBOUDREAULT, Louis-Etienne
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorDUPONT, Sylvain
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorLAGOUARDE, Jean-Pierre
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorIRVINE, Mark
dc.date.accessioned2024-04-08T12:10:26Z
dc.date.available2024-04-08T12:10:26Z
dc.date.issued2016
dc.date.conference2016-06-20
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/196630
dc.description.abstractEnAcquiring the surface temperature is important in various research fields needing to quantify the surface energy balance (e.g. meteorology, hydrology, climatology, etc.). For such task, high-spatial resolution satellite thermal infrared (TIR) measurements are promising, but due to constraints in the specifications of space missions, TIR satellite images are prone to temporal and spatial variability in the measurement acquisition in relation with the rapid feedback between the surface temperature and atmospheric turbulence. This variability in measurement acquisition may limit the data accuracy. During daytime, the fluctuations of surface temperature are governed by large-scale convective eddy motions in the outer atmosphere and local coherent eddies forming over vegetation canopies. To estimate the possible error related to these fluctuations, it is necessary to understand the extent of their length- and time-scales. With such motivation, an experiment was conducted in 2015 in the Landes forest in France. A TIR camera overlooking a maritime pine forest stand (15-20 m high) was set up to acquire the surface temperatures at high spatial and temporal resolutions (≈10 m, 10 Hz), together with wind velocity from a sonic anemometer. A scaling analysis of the measurements (Fourier, wavelets, etc.) is performed to identify the scaling regime of the surface temperature fluctuations following the atmospheric stability. We discuss these results in the context of satellite thermal imagery uncertainties.
dc.language.isoen
dc.subjectinfrarouge thermique
dc.subjectdonnée satellite
dc.subjecttempérature de surface
dc.subjectpinus pinaster
dc.subject.enmaritime pine
dc.title.enSpatial and temporal variability of surface temperature of a forest canopy
dc.typeCommunication dans un congrès
dc.subject.halSciences de l'environnement/Milieux et Changements globaux
dc.subject.halPlanète et Univers [physics]/Sciences de la Terre
bordeaux.pagenp
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.conference.title22. Symposium on Boundary Layers and Turbulence
bordeaux.countryUS
bordeaux.conference.citySalt Lake City
bordeaux.peerReviewednon
hal.identifierhal-01594877
hal.version1
hal.invitednon
hal.proceedingsoui
hal.conference.organizerAmerican Meteorological Society (AMS). USA.
hal.conference.end2016-06-24
hal.popularnon
hal.audienceNon spécifiée
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01594877v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.date=2016&rft.spage=np&rft.epage=np&rft.au=BOUDREAULT,%20Louis-Etienne&DUPONT,%20Sylvain&LAGOUARDE,%20Jean-Pierre&IRVINE,%20Mark&rft.genre=unknown


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