Afficher la notice abrégée

How stand tree motion impacts wind dynamics during windstorms

hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorDUPONT, Sylvain
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorDEFOSSEZ, Pauline
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorBONNEFOND, Jean-Marc
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorIRVINE, Mark R.
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorGARRIGOU, Didier
dc.date.accessioned2024-04-08T12:08:40Z
dc.date.available2024-04-08T12:08:40Z
dc.date.issued2018
dc.identifier.issn0168-1923
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/196532
dc.description.abstractEnUnderstanding how wind and trees interact during wind storms is crucial for better predicting forest wind damage. The complexity of this interaction is enhanced by the fragmented environment of forests. Here, we present an unprecedented field experiment (TWIST) where both the wind dynamics and the tree motion in the edge region of a maritime pine forest have been recorded simultaneously during four non-destructive wind storms. For three of them, the instrumented trees were under stand flow while for one of them they were under an edge flow. Our measurements demonstrate that the well-known characteristics of stand-flow dynamics remain valid under high wind conditions. Only the sub-canopy flow appeared more intermittent as canopy-top turbulent structures penetrate easier within the canopy due to the tree foliage reconfiguration. Under similar storm intensity, the tree motions were lower under edge flow than under stand flow due to the lower turbulence of the former flow while the mean wind speed was higher. This result demonstrates the importance of considering both the turbulence and the mean wind speed in wind risk models. No impact of tree motion other than tree reconfiguration were observed on the stand flow dynamics. On the other hand, for the edge flow, our measurements reveal a peak in frequency on the wind velocity fluctuations related to the fundamental tree vibration mode. This peak was especially visible at canopy top and in the upper trunk space under high wind conditions. Compared to the stand flow, we suspect that the velocity fluctuations induced by the tree motion emerge in the edge flow due to the lower background turbulence. Our edge storm was nonetheless not strong enough for tree motion to enhance flow turbulence and for trees to enter into resonance. These findings may suggest a higher susceptibility of near-edge trees to reach resonance than stand trees due to the motion of upwind trees in a lower background turbulence.
dc.language.isoen
dc.publisherElsevier Masson
dc.subjecttempête
dc.subjectdégât dû au vent
dc.subjectrésistance au vent
dc.subjectforêt
dc.subjectcanopée
dc.subjectpinus pinaster
dc.subjectturbulence
dc.subject.enedge flow
dc.subject.enforest wind damage
dc.subject.entree motion
dc.subject.enwind storm
dc.subject.enwind-tree interaction
dc.subject.enthunderstorm
dc.subject.enwind damage
dc.subject.enwind resistance
dc.subject.enforest
dc.subject.encanopy
dc.subject.enmaritime pine
dc.title.enHow stand tree motion impacts wind dynamics during windstorms
dc.typeArticle de revue
dc.identifier.doi10.1016/j.agrformet.2018.06.022
dc.subject.halSciences du Vivant [q-bio]
bordeaux.journalAgricultural and Forest Meteorology
bordeaux.page42-58
bordeaux.volume262
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-01852562
hal.version1
hal.popularnon
hal.audienceNon spécifiée
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01852562v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Agricultural%20and%20Forest%20Meteorology&rft.date=2018&rft.volume=262&rft.spage=42-58&rft.epage=42-58&rft.eissn=0168-1923&rft.issn=0168-1923&rft.au=DUPONT,%20Sylvain&DEFOSSEZ,%20Pauline&BONNEFOND,%20Jean-Marc&IRVINE,%20Mark%20R.&GARRIGOU,%20Didier&rft.genre=article


Fichier(s) constituant ce document

FichiersTailleFormatVue

Il n'y a pas de fichiers associés à ce document.

Ce document figure dans la(les) collection(s) suivante(s)

Afficher la notice abrégée