caa a22 4500 475777549 CHVBK 20180406123635.0 cr unu---uuuuu 170329e20000401xx s 000 0 eng 10.1023/A:1002473906184 doi (NATIONALLICENCE)springer-10.1023/A:1002473906184 Modelling Vegetation-Atmosphere Co2 Exchange By A Coupled Eulerian-Langrangian Approach [Elektronische Daten] [Chun-Ta Lai, Gabriel Katul, David Ellsworth, Ram Oren] A Eulerian-Lagrangian canopy microclimate model wasdeveloped with the aim of discerning physical frombiophysical controls of CO2 and H2O fluxes. The model couples radiation attenuation with mass,energy, and momentum exchange at different canopylevels. A unique feature of the model is its abilityto combine higher order Eulerian closure approachesthat compute velocity statistics with Lagrangianscalar dispersion approaches within the canopy volume. Explicit accounting for within-canopy CO2,H2O, and heat storage is resolved by consideringnon-steadiness in mean scalar concentration andtemperature. A seven-day experiment was conducted inAugust 1998 to investigate whether the proposedmodel can reproduce temporal evolution of scalar(CO2, H2O and heat) fluxes, sources andsinks, and concentration profiles within and above auniform 15-year old pine forest. The modelreproduced well the measured depth-averaged canopy surfacetemperature, CO2 and H2O concentrationprofiles within the canopy volume, CO2 storageflux, net radiation above the canopy, and heat andmass fluxes above the canopy, as well as the velocitystatistics near the canopy-atmosphere interface. Implications for scaling measured leaf-levelbiophysical functions to ecosystem scale are alsodiscussed. Kluwer Academic Publishers, 2000 Canopy turbulence nationallicence Lagrangian stochastic model nationallicence Turbulence closure nationallicence Canopy photosynthesis nationallicence Carbon dioxide nationallicence Radiation attenuation nationallicence Lai Chun-Ta School of the Environment, Duke University, Box 90328, 27708-0328, Durham, NC, U.S.A. aut Katul Gabriel School of the Environment, Duke University, Box 90328, 27708-0328, Durham, NC, U.S.A. aut Ellsworth David School of the Environment, Duke University, Box 90328, 27708-0328, Durham, NC, U.S.A. aut Oren Ram School of the Environment, Duke University, Box 90328, 27708-0328, Durham, NC, U.S.A. aut Boundary-Layer Meteorology Kluwer Academic Publishers 95/1(2000-04-01), 91-122 0006-8314 95:1<91 2000 95 10546 https://doi.org/10.1023/A:1002473906184 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1002473906184 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lai Chun-Ta School of the Environment, Duke University, Box 90328, 27708-0328, Durham, NC, U.S.A aut NATIONALLICENCE 700 1- Katul Gabriel School of the Environment, Duke University, Box 90328, 27708-0328, Durham, NC, U.S.A aut NATIONALLICENCE 700 1- Ellsworth David School of the Environment, Duke University, Box 90328, 27708-0328, Durham, NC, U.S.A aut NATIONALLICENCE 700 1- Oren Ram School of the Environment, Duke University, Box 90328, 27708-0328, Durham, NC, U.S.A aut NATIONALLICENCE 773 0- Boundary-Layer Meteorology Kluwer Academic Publishers 95/1(2000-04-01), 91-122 0006-8314 95:1<91 2000 95 10546 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer