Showing results 161 to 180 of 206
 Carbon budget of a sugar beet cropMoureaux, Christine  ; Bodson, Bernard ; Aubinet, Marc Conference (2005) Detailed reference viewed: 3 (2 ULg) Quality Analysis Applied On Eddy Covariance Measurements At Complex Forest Sites Using Footprint Modelling; ; et al in Theoretical and Applied Climatology (2005), 80(2-4), Detailed reference viewed: 12 (2 ULg) Estimating CO2 flux of croplands for bottom-up carbon budgettingMoureaux, Christine ; Aubinet, Marc ; et alin Geophysical Research Abstracts (2005), 7(1), Detailed reference viewed: 9 (1 ULg)Carbon budget of a sugar beet cropMoureaux, Christine ; ; et alin Abstracts and proceedings - 68th Congress 2005 (2005) Detailed reference viewed: 12 (2 ULg)Carbon budget of a sugar beet cropMoureaux, Christine ; ; et alin Geophysical Research Abstracts (2005), 7(1), Detailed reference viewed: 7 (2 ULg)Some methodological aspects of local advection measurements: a case studyHeinesch, Bernard ; Yernaux, Michel ; Aubinet, Marc Poster (2005) Detailed reference viewed: 4 (0 ULg)Europe-Wide Reduction In Primary Productivity Caused By The Heat And Drought In 2003; ; et al in Nature (2005), 437(7058), Detailed reference viewed: 32 (2 ULg)Combining CO2 flux measurementss and modelling to evaluate footprint predictions at a heterogeneous siteAubinet, Marc ; Heinesch, Bernard ; Moureaux, Christine in Geophysical Research Abstracts (2004), 6(1), Detailed reference viewed: 5 (1 ULg)Modelisation de la reponse des flux de respiration d'un sol forestier selon les principales variables climatiques.Perrin, Dominique ; ; Aubinet, Marc et alin Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2004), 8(1), Detailed reference viewed: 20 (5 ULg)Model Of Forest Carbon Sequestration Incorporating Aerial Wood Radiative Budget; Aubinet, Marc ; François, Louis in Agricultural and Forest Meteorology (2004), 125(1-2), 83-104 The CHANCE model, simulating CO2, energy and water fluxes in a forest ecosystem, is presented. The components of the simulated canopy are the leaves, the branches, the trunks and the soil. The first three ... [more ▼] The CHANCE model, simulating CO2, energy and water fluxes in a forest ecosystem, is presented. The components of the simulated canopy are the leaves, the branches, the trunks and the soil. The first three are divided into sunny and shaded zones. The model has been calibrated and validated in comparison with measurements performed in the temperate beech forest of Vielsalm (Belgium). For the reproduction of half-hourly net CO2 fluxes, the quality of the CHANCE results is comparable to other models (systematic error of 14%—0.51 molm−2 s−1, R2 = 0.79). The differences between simulated and measured fluxes result essentially from noise in the data, underestimation of the stomatal conductance during very dry days and heterogeneity of the south, southeast sector (presence of conifer patches). Three sensitivity tests have been performed. The first one, neglecting the contribution of aerial wood in the radiation budget, doubles the annual carbon sequestration (Seco). This trend is strengthened in the second test where common radiative and photosynthetic properties are assigned to leaves and branches. The third test induces a 30% reduction of Seco when the calculation of canopy component temperatures using the complete energy balance is replaced by the use of air temperature. © 2004 Elsevier B.V. All rights reserved. [less ▲] Detailed reference viewed: 8 (2 ULg)Methodology for data acquisition, storage and treatmentAubinet, Marc ; ; et alin Valentini, R. (Ed.) Fluxes of Carbon, Water and Energy of European Forests (2003) Detailed reference viewed: 14 (0 ULg)Deciduous forests: carbon and water fluxes balances, ecological and ecophysiological determinants; Aubinet, Marc ; et alin Valentini, Riccardo (Ed.) Fluxes of Carbon, Water and Energy of European Forests (2003) Detailed reference viewed: 21 (0 ULg)Spruce forests (Norway and Sitka spruce, including Douglas fir): Carbon and water fluxes, Balances, Ecological and ecophysiological determinants; Aubinet, Marc ; et alin Valentini, Riccardo (Ed.) Fluxes of Carbon, Water and Energy of European Forests (2003) Detailed reference viewed: 41 (0 ULg)A Model Based Study of Carbon Fluxes at Ten European Forest Sites; ; Aubinet, Marc et alin Valentini, Riccardo (Ed.) Fluxes of Carbon, Water and Energy of European Forests (2003) Detailed reference viewed: 15 (0 ULg)Horizontal And Vertical Co2 Advection In A Sloping ForestAubinet, Marc ; Heinesch, Bernard ; Yernaux, Michel in Boundary-Layer Meteorology (2003), 108(3), Detailed reference viewed: 13 (2 ULg)Diurnal Centroid Of Ecosystem Energy And Carbon Fluxes At Fluxnet Sites; ; et al in Journal of Geophysical Research. Atmospheres (2003), 108(D21), Detailed reference viewed: 19 (5 ULg)Predicting transpiration from forest stands in Belgium for the 21st century; ; et al in Agricultural and Forest Meteorology (2002), 111(4), 265-282 Canopy transpiration is a major element of the hydrological cycle of temperate forests. Levels of water stress during the 21st century will be largely controlled by the response of canopy transpiration to ... [more ▼] Canopy transpiration is a major element of the hydrological cycle of temperate forests. Levels of water stress during the 21st century will be largely controlled by the response of canopy transpiration to changing environmental conditions. One year of transpiration measurement in two stands (Quercus robur L. and Fagus sylvatica L.) was used to calibrate the ASPECTS model on a(1) and D-0, two parameters of a modified version of Leuning's equation of stomatal conductance. A second year of data was used to validate the model. The results indicate a higher sensitivity of g(sc), to vapour pressure deficit (DS) in oak than in beech (D-0 (oak) < D-0 (beech)). To simulate future forest transpiration, site specific weather data sets were constructed from GCM outputs, spatially and temporally downscaled with local climatic data. Temperature increase between the end of the 20th and 21st centuries was predicted to be 2.8 degreesC in the beech stand and 3.1 degreesC in the oak stand. Based solely on temperature change, ASPECTS predicted an increase in transpiration of 17% in the beech and 6% in the oak stand, the difference being due to variation in local climate and the sensitivity of both species to D-s. Based solely on increased atmospheric CO2 (355 ppm in 1990 to 700 ppm in 2100), ASPECTS predicted that transpiration would decrease by 22% in beech and 19% in oak. With the combined scenarios of climatic change and increased atmospheric CO2, ASPECTS showed a decrease of 7% in transpired water in the oak stand and only 4% in the beech stand, which are not significant differences from zero. Consequently, water stress should not increase in either stand during the 21st century. (C) 2002 Elsevier Science B.V All rights reserved. [less ▲] Detailed reference viewed: 23 (3 ULg)Energy Partitioning Between Latent And Sensible Heat Flux During The Warm Season At Fluxnet Sites; ; Aubinet, Marc et alin Water Resources Research (2002), 38(12), Detailed reference viewed: 13 (4 ULg)Estimation Of The Carbon Sequestration By A Heterogeneous Forest: Night Flux Corrections, Heterogeneity Of The Site And Inter-Annual VariabilityAubinet, Marc ; Heinesch, Bernard ; in Global Change Biology (2002), 8(11), Detailed reference viewed: 11 (2 ULg)Energy Balance Closure At Fluxnet Sites; ; et al in Agricultural and Forest Meteorology (2002), 113(1-4), Detailed reference viewed: 10 (1 ULg) |
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