TAILIEUCHUNG - Báo cáo khoa học: "Energy balance storage terms and big-leaf evapotranspiration in a mixed deciduous forest"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: Energy balance storage terms and big-leaf evapotranspiration in a mixed deciduous forest. | Ann. For. Sci. 58 2001 529-541 INRA EDP Sciences 2001 529 Original article Energy balance storage terms and big-leaf evapotranspiration in a mixed deciduous forest Roeland Samson and Raoul Lemeur Laboratory of Plant Ecology Ghent University Coupure Links 653 9000 Ghent Belgium Received 8 August 2000 accepted 20 December 2000 Abstract - Five different heat storage terms were studied in a mixed deciduous forest. All terms should be taken into account for the calculation of the overall heat storage because they all can be significant during certain weather conditions and hours. Heat storage in biomass is estimated using surface temperatures measured with an infrared radiometer which seems to be a good method. The often neglected photosynthetic heat storage may not be omitted. On a seasonal basis soil heat storage seems to be the most important term. The overall heat storage shows a small tendency for releasing heat to the atmosphere during fall. Fluctuations in overall heat storage are a result of complex changes of several climatic parameters. Due to the high degree of coupling of the forest to the atmosphere accurate measurements of overall heat storage for the determination of big leaf forest evapotranspiration are not of the utmost importance. energy storage deciduous forest evapotranspiration infrared radiometer coupling Résumé - Determination des termes du bilan d energie et calcul de l evapotranspiration par un modèle big-leaf en peuple-ment feuillu melange. Cinq termes différents du bilan d energie ont été étudiés dans un peuplement feuillu mélangé. Etant donné que chacun de ces termes peut être significatif en fonction de l heure et des conditions climatiques ils doivent tous être pris en compte pour un calcul précis. L énergie stockée dans la biomasse a été estimée à partir de la température de surface mesurée à l aide d un radiomètre infrarouge. La méthode donne de bons résultats. Le stock d énergie photosynthétique est non négligeable quoique souvent omis.

• Báo cáo khoa học
• Báo cáo lâm nghiệp hay
• cách trình bày báo cáo
• báo cáo lâm nghiệp
• công trình nghiên cứu lâm nghiệp
• tài liệu về lâm nghiệp