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Fragmented landscape: Impact on atmospheric flow and tree stability

hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorPOETTE, Christopher
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorGARDINER, Barry
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorDUPONT, Sylvain
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorBRUNET, Yves
hal.structure.identifierAustralian Meteorological and Oceanographic Society
dc.contributor.authorBÖHM, Margi
hal.structure.identifierCommonwealth Scientific and Industrial Research Organisation [Canberra] [CSIRO]
dc.contributor.authorHARMAN, Ian
hal.structure.identifierCommonwealth Scientific and Industrial Research Organisation [Canberra] [CSIRO]
dc.contributor.authorFINNIGAN, John
hal.structure.identifierCommonwealth Scientific and Industrial Research Organisation [Canberra] [CSIRO]
dc.contributor.authorHUGHES, Dale
dc.date.accessioned2024-04-08T11:54:59Z
dc.date.available2024-04-08T11:54:59Z
dc.date.issued2014
dc.date.conference2014-06-09
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/195634
dc.description.abstractEnThe wind is responsible of more than half of the damage affecting European forests, e.g., in 2009, Klaus storm directly destroyed 43.1 Mm3 of timber in the Landes Forest in South-west France equivalent to 14% of the standing volume. At present only local stand level factors are taken into account in calculating forest wind risk (Gardiner et al., 2008). However, it is known that the wind is strongly affected by the surfaces over which it has previously flowed. Forest edges in particular play an important role in determining the characteristics of the atmospheric flow by generating turbulence and coherent tree scale structures and represent region of high damage risk (Brunet et al. 2009). In a fragmented landscape, consisting of surfaces of different heights and roughness, the multiplicity of edges may have cumulative effects at the regional scale leading to increased forest damage during storms. Our main hypothesis is that the level of forest fragmentation affects the characteristics of the atmospheric flow (wind speed, turbulent kinetic energy, etc…), which then have an impact on the level of mechanical stress on trees in the forest. To test this we conducted experiments using a well characterized wind tunnel model with different levels of fragmentation that mimic interfaces from a “short grass” surface to a “tall forest” canopy (Raupach et al., 1986). Measurements were made using 3D Laser Doppler Velocimetry at high spatial resolution. This set of experiments has been used to calibrate a Large-Eddy Simulation (LES) airflow model accounting for the canopy drag (Dupont and Brunet, 2008). The LES is then used to predict the potential impact and risk levels of fragmentation on forest damage in order to try to understand observations of recent storms damage to the forests of South-west France.
dc.language.isoen
dc.title.enFragmented landscape: Impact on atmospheric flow and tree stability
dc.typeCommunication dans un congrès
dc.subject.halSciences de l'environnement/Milieux et Changements globaux
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.conference.title21st Symposium on Boundary Layers and Turbulence
bordeaux.countryGB
bordeaux.conference.cityLeeds
bordeaux.peerReviewedoui
hal.identifierhal-02799073
hal.version1
hal.invitednon
hal.conference.end2014-06-13
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02799073v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.date=2014&rft.au=POETTE,%20Christopher&GARDINER,%20Barry&DUPONT,%20Sylvain&BRUNET,%20Yves&B%C3%96HM,%20Margi&rft.genre=unknown


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