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Aerodynamic parameters over an eroding bare surface: reconciliation of the law of the wall and eddy covariance determinations

hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorDUPONT, Sylvain
hal.structure.identifierInstitut d'écologie et des sciences de l'environnement de Paris [iEES Paris ]
hal.structure.identifierLaboratoire Interuniversitaire des Systèmes Atmosphériques [LISA (UMR_7583)]
dc.contributor.authorRAJOT, J-L
hal.structure.identifierInstitut des Régions Arides [IRA]
dc.contributor.authorLABIADH, M.
hal.structure.identifierLaboratoire Interuniversitaire des Systèmes Atmosphériques [LISA (UMR_7583)]
dc.contributor.authorBERGAMETTI, G.
hal.structure.identifierLaboratoire Interuniversitaire des Systèmes Atmosphériques [LISA (UMR_7583)]
dc.contributor.authorALFARO, S.
hal.structure.identifierLaboratoire Interuniversitaire des Systèmes Atmosphériques [LISA (UMR_7583)]
hal.structure.identifierInstitut d'écologie et des sciences de l'environnement de Paris [iEES Paris ]
dc.contributor.authorBOUET, C.
hal.structure.identifierLaboratoire de recherche en Hydrodynamique, Énergétique et Environnement Atmosphérique [LHEEA]
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorFERNANDES, R.
hal.structure.identifierLaboratoire Interuniversitaire des Systèmes Atmosphériques [LISA (UMR_7583)]
dc.contributor.authorKHALFALLAH, B.
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorLAMAUD, Eric
hal.structure.identifierLaboratoire Interuniversitaire des Systèmes Atmosphériques [LISA (UMR_7583)]
dc.contributor.authorMARTICORÉNA, B.
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorBONNEFOND, J-M
hal.structure.identifierLaboratoire Interuniversitaire des Systèmes Atmosphériques [LISA (UMR_7583)]
dc.contributor.authorCHEVAILLIER, S.
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorGARRIGOU, D.
hal.structure.identifierInstitut d'écologie et des sciences de l'environnement de Paris [iEES Paris ]
dc.contributor.authorHENRY-DES-TUREAUX, T.
dc.contributor.authorSEKRAFI, S.
hal.structure.identifierLieux, Identités, eSpaces, Activités [LISA]
dc.contributor.authorZAPF, P.
dc.date.accessioned2024-04-08T12:07:51Z
dc.date.available2024-04-08T12:07:51Z
dc.date.issued2018-05-16
dc.identifier.issn2169-897X
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/196488
dc.description.abstractEnAssessing accurately the surface friction velocity is a key issue for predicting and quantifying aeolian soil erosion. This is usually done either indirectly from the law of the wall (LoW) of the mean wind velocity profile or directly from eddy covariance (EC) of the streamwise and vertical wind velocity fluctuations. However, several recent experiments have reported inconsistency between friction velocities deduced from both methods. Here we reinvestigate the determination of aerodynamic parameters (friction velocity and surface roughness length) over an eroding bare surface and look at the possible reasons for observing differences on these parameters following the method. For that purpose a novel field experiment was performed in South Tunisia under the research program WIND-O-V (WIND erOsion in presence of sparse Vegetation). We find no significant difference between friction velocities obtained from both law of the wall and EC approaches when the friction velocity deduced from the EC method was extrapolated to the surface. Surface roughness lengths show a clear increase with wind erosion, with more scattered values when deduced from the EC friction velocity. Our measurements further suggest an average value of the von Karman constant of 0.407±0.002, although individual wind events lead to different average values due probably to the definition of the ground level or to the stability correction. Importantly, the von Karman constant was found independent of the wind intensity and thus of the wind soil erosion intensity. Finally, our results lead to several recommendations for estimating the aerodynamic parameters over bare surface in order to evaluate saltation and dust fluxes.
dc.language.isoen
dc.publisherAmerican Geophysical Union
dc.title.enAerodynamic parameters over an eroding bare surface: reconciliation of the law of the wall and eddy covariance determinations
dc.typeArticle de revue
dc.identifier.doi10.1029/2017JD027984
dc.subject.halPlanète et Univers [physics]
dc.subject.halPlanète et Univers [physics]/Océan, Atmosphère
dc.subject.halPlanète et Univers [physics]/Interfaces continentales, environnement
bordeaux.journalJournal of Geophysical Research: Atmospheres
bordeaux.page4490-4508
bordeaux.volume123
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.issue9
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-02323430
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02323430v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20of%20Geophysical%20Research:%20Atmospheres&rft.date=2018-05-16&rft.volume=123&rft.issue=9&rft.spage=4490-4508&rft.epage=4490-4508&rft.eissn=2169-897X&rft.issn=2169-897X&rft.au=DUPONT,%20Sylvain&RAJOT,%20J-L&LABIADH,%20M.&BERGAMETTI,%20G.&ALFARO,%20S.&rft.genre=article


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