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Gembloux Agro-Bio Tech (GxABT)
Gembloux Agro-Bio Tech (GxABT)
MASTER THESIS
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Analysis of vegetation-atmosphere transfers simulated by the Interaction Soil-Biosphere-Atmosphere (ISBA) model for a beech forest in Lorraine, France

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Acerbis, Julie ULiège
Promotor(s) : Longdoz, Bernard ULiège
Date of defense : 16-Jan-2024 • Permalink : http://hdl.handle.net/2268.2/19713
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Title : Analysis of vegetation-atmosphere transfers simulated by the Interaction Soil-Biosphere-Atmosphere (ISBA) model for a beech forest in Lorraine, France
Author : Acerbis, Julie ULiège
Date of defense  : 16-Jan-2024
Advisor(s) : Longdoz, Bernard ULiège
Committee's member(s) : Heinesch, Bernard ULiège
Ligot, Gauthier ULiège
Delire, Christine 
Joetzjer, Émilie 
Longdoz, Bernard ULiège
Language : English
Keywords : [en] Fagus Sylvatica L. - Land surface model - ISBA - ICOS network - Phenology - Soil-plant system exchanges with the atmosphere - Climate change
Discipline(s) : Life sciences > Environmental sciences & ecology
Research unit : This master thesis was carried out with the support of the Biosystems Dynamics and Exchanges (BIODYNE) department of Gembloux Agro-Bio Tech, University of Liege, as well as the help of INRAE and Météo France, respectively represented by Bernard Longdoz, Emilie Joetzjer and Christine Delire.
Target public : Researchers
Professionals of domain
Student
Institution(s) : Université de Liège, Liège, Belgique
Degree: Master en bioingénieur : sciences et technologies de l'environnement, à finalité spécialisée
Faculty: Master thesis of the Gembloux Agro-Bio Tech (GxABT)

Abstract

[en] Climate change is anticipated to increase the frequency of drought events, posing a significant threat to the European Beech, Fagus Sylvatica L., known for its high sensitivity to such conditions. This heightened vulnerability may lead to a northward migration of its distribution, impacting carbon sequestration. In light of these concerns, developing land surface models tailored to forest ecosystems becomes crucial for predicting their fate under changing climate conditions. To address this, the Interaction Soil-Biosphere-Atmosphere (ISBA) component of the SURFEX model underwent adjustments to refine predictions under drought events, specifically considering the unique phenology of the Beech. The study focuses on the ICOS network station located in the Beech forest of Hesse, France, providing standardized, high-precision, high-frequency, and long-term observations.
Initially, a simulation was conducted, keeping the ISBA model intact to evaluate its baseline performance. Subsequently, two simulations were implemented to impose phenological adjustments, enhancing the representation of carbon transfers between the soil-plant system and the atmosphere. The first simulation incorporated the observed Leaf Area Index (LAI) into the photosynthesis subroutine, while the second, more performant, additionally implemented observed LAI in the carbon allocation scheme. Despite these advancements, the drought-induced reduction in latent heat flux and gross primary production were poorly represented. Further adjustments, such as implementing hydraulic architecture, are necessary to refine the drought response regarding the water vapour fluxes.
The promising results of imposing phenology hold the potential to yield an enhanced representation of soil-plant system exchanges with the atmosphere. This improvement, once achieved, would enable more accurate forecasting of forest responses under climate change conditions.


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Author

  • Acerbis, Julie ULiège Université de Liège > Gembloux Agro-Bio Tech

Promotor(s)

Committee's member(s)

  • Heinesch, Bernard ULiège Université de Liège - ULiège > Département GxABT > Biosystems Dynamics and Exchanges
    ORBi View his publications on ORBi
  • Ligot, Gauthier ULiège Université de Liège - ULiège > Département GxABT > Gestion des ressources forestières
    ORBi View his publications on ORBi
  • Delire, Christine
  • Joetzjer, Émilie
  • Longdoz, Bernard ULiège Université de Liège - ULiège > Département GxABT > Biosystems Dynamics and Exchanges
    ORBi View his publications on ORBi
  • Total number of views 42
  • Total number of downloads 31










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