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No. de sistema: 000026984

LDR _ _ 00000nab^^22^^^^^za^4500
008 _ _ 180523m20189999xx^^r^p^^^^^^z0^^^a0eng^d
040 _ _ a| ECO
c| ECO
044 _ _ a| xx
245 0 0 a| Measuring and modelling energy partitioning in canopies of varying complexity using MAESPA model
506 _ _ a| Acceso electrónico sólo para usuarios de ECOSUR
520 1 _ a| Evapotranspiration and energy partitioning are complex to estimate because they result from the interaction of many different processes, especially in multi-species and multi-strata ecosystems. We used MAESPA model, a mechanistic, 3D model of coupled radiative transfer, photosynthesis, and balances of energy and water, to simulate the partitioning of energy and evapotranspiration in homogeneous tree plantations, as well as in heterogeneous multi-species, multi-strata agroforests with diverse spatial scales and management schemes. The MAESPA model was modified to add (1) calculation of foliage surface water evaporation at the voxel scale; (2) computation of an average within-canopy air temperature and vapour pressure; and (3) use of (1) and (2) in iterative calculations of soil and leaf temperatures to close ecosystem-level energy balances. We tested MAESPA model simulations on a simple monospecific Eucalyptus stand in Brazil, and also in two complex, heterogeneous Coffea agroforests in Costa Rica. MAESPA satisfactorily simulated the daily and seasonal dynamics of net radiation (RMSE=29.6 and 28.4Wm−²; R²=0.99 and 0.99 for Eucalyptus and Coffea sites respectively) and its partitioning between latent-(RMSE=68.1 and 37.2Wm−²; R²=0.87 and 0.85) and sensible-energy (RMSE=54.6 and 45.8Wm−²; R²=0.57 and 0.88) over a one-year simulation at half-hourly time-step.
520 1 _ a| After validation, we use the modified MAESPA to calculate partitioning of evapotranspiration and energy between plants and soil in the above-mentioned agro-ecosystems. In the Eucalyptus plantation, 95% of the outgoing energy was emitted as latent-heat, while the Coffea agroforestry system’s partitioning between sensible and latent-heat fluxes was roughly equal. We conclude that MAESPA process-based model has an appropriate balance of detail, accuracy, and computational speed to be applicable to simple or complex forest ecosystems and at different scales for energy and evapotranspiration partitioning.
538 _ _ a| Adobe Acrobat profesional 6.0 o superior
650 _ 4 a| Sistemas agroforestales
650 _ 4 a| Cafetal
650 _ 4 a| Eucalyptus
650 _ 4 a| Evapotranspiración
650 _ 4 a| Ordenación forestal
651 _ 4 a| Costa Rica
651 _ 4 a| Brasil
700 1 _ a| Vezy, Rémi
700 1 _ a| Christina, Mathias
e| coaut.
700 1 _ a| Roupsard, Olivier
e| coaut.
700 1 _ a| Nouvellon, Yann
e| coaut.
700 1 _ a| Duursma, Remko A.
e| coaut.
n| 6602225064
700 1 _ a| Medlyn, Belinda E.
e| coaut.
n| 6603835282
700 1 _ a| Soma, Maxime
e| coaut.
700 1 _ a| Charbonnier, Fabien Sylvain Jacky
e| coaut.
700 1 _ a| Blitz Frayret, Céline
e| coaut.
700 1 _ a| Stape, José Luiz
e| coaut.
700 1 _ a| Laclau, Jean Paul
e| coaut.
700 1 _ a| Filho, Elias de Melo Virginio
e| coaut.
700 1 _ a| Bonnefond, Jean Marc
e| coaut.
700 1 _ a| Rapidel, Bruno
e| coaut.
700 1 _ a| Do, Frédéric C.
e| coaut.
700 1 _ a| Rocheteau, Alain
e| coaut.
700 1 _ a| Picart, Delphine
e| coaut.
700 1 _ a| Borgonovo, Carlos
e| coaut.
700 1 _ a| Loustau, Denis
e| coaut.
700 1 _ a| le Maire, Guerric
e| coaut.
773 0 _
t| Agricultural and Forest Meteorology
g| Vol. 253–254 (May 2018), p. 203-217
x| 0168-1923
900 _ _ a| Solicítelo con su bibliotecario/a
901 _ _ a| Artículo con arbitraje
902 _ _ a| GOG / MM
905 _ _ a| Artecosur
905 _ _ a| Servibosques
905 _ _ a| Biblioelectrónica
906 _ _ a| Producción Académica ECOSUR
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Inglés

"Evapotranspiration and energy partitioning are complex to estimate because they result from the interaction of many different processes, especially in multi-species and multi-strata ecosystems. We used MAESPA model, a mechanistic, 3D model of coupled radiative transfer, photosynthesis, and balances of energy and water, to simulate the partitioning of energy and evapotranspiration in homogeneous tree plantations, as well as in heterogeneous multi-species, multi-strata agroforests with diverse spatial scales and management schemes. The MAESPA model was modified to add (1) calculation of foliage surface water evaporation at the voxel scale; (2) computation of an average within-canopy air temperature and vapour pressure; and (3) use of (1) and (2) in iterative calculations of soil and leaf temperatures to close ecosystem-level energy balances. We tested MAESPA model simulations on a simple monospecific Eucalyptus stand in Brazil, and also in two complex, heterogeneous Coffea agroforests in Costa Rica. MAESPA satisfactorily simulated the daily and seasonal dynamics of net radiation (RMSE=29.6 and 28.4Wm−²; R²=0.99 and 0.99 for Eucalyptus and Coffea sites respectively) and its partitioning between latent-(RMSE=68.1 and 37.2Wm−²; R²=0.87 and 0.85) and sensible-energy (RMSE=54.6 and 45.8Wm−²; R²=0.57 and 0.88) over a one-year simulation at half-hourly time-step."

"After validation, we use the modified MAESPA to calculate partitioning of evapotranspiration and energy between plants and soil in the above-mentioned agro-ecosystems. In the Eucalyptus plantation, 95% of the outgoing energy was emitted as latent-heat, while the Coffea agroforestry system’s partitioning between sensible and latent-heat fluxes was roughly equal. We conclude that MAESPA process-based model has an appropriate balance of detail, accuracy, and computational speed to be applicable to simple or complex forest ecosystems and at different scales for energy and evapotranspiration partitioning."


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