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Modelling vegetation-atmosphere CO2 exchange by a coupled Eulerian-Langrangian approach

Publication ,  Journal Article
Lai, CT; Katul, G; Ellsworth, D; Oren, R
Published in: Boundary-Layer Meteorology
January 1, 2000

A Eulerian-Lagrangian canopy microclimate model was developed with the aim of discerning physical from biophysical controls of CO2 and H2O fluxes. The model couples radiation attenuation with mass, energy, and momentum exchange at different canopy levels. A unique feature of the model is its ability to combine higher order Eulerian closure approaches that compute velocity statistics with Lagrangian scalar dispersion approaches within the canopy volume. Explicit accounting for within-canopy CO2, H2O, and heat storage is resolved by considering non-steadiness in mean scalar concentration and temperature. A seven-day experiment was conducted in August 1998 to investigate whether the proposed model can reproduce temporal evolution of scalar (CO2, H2O and heat) fluxes, sources and sinks, and concentration profiles within and above a uniform 15-year old pine forest. The model reproduced well the measured depth-averaged canopy surface temperature, and CO2 concentration profiles within the canopy volume, CO2 storage flux, net radiation above the canopy, and heat and mass fluxes above the canopy, as well as the velocity statistics near the canopy-atmosphere interface. Implications for scaling measured leaf-level biophysical functions to ecosystem scale are also discussed.

Duke Scholars

Published In

Boundary-Layer Meteorology

DOI

ISSN

0006-8314

Publication Date

January 1, 2000

Volume

95

Issue

1

Start / End Page

91 / 122

Related Subject Headings

  • Meteorology & Atmospheric Sciences
  • 3701 Atmospheric sciences
  • 0401 Atmospheric Sciences
 

Citation

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MLA
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Lai, C. T., Katul, G., Ellsworth, D., & Oren, R. (2000). Modelling vegetation-atmosphere CO2 exchange by a coupled Eulerian-Langrangian approach. Boundary-Layer Meteorology, 95(1), 91–122. https://doi.org/10.1023/A:1002473906184
Lai, C. T., G. Katul, D. Ellsworth, and R. Oren. “Modelling vegetation-atmosphere CO2 exchange by a coupled Eulerian-Langrangian approach.” Boundary-Layer Meteorology 95, no. 1 (January 1, 2000): 91–122. https://doi.org/10.1023/A:1002473906184.
Lai CT, Katul G, Ellsworth D, Oren R. Modelling vegetation-atmosphere CO2 exchange by a coupled Eulerian-Langrangian approach. Boundary-Layer Meteorology. 2000 Jan 1;95(1):91–122.
Lai, C. T., et al. “Modelling vegetation-atmosphere CO2 exchange by a coupled Eulerian-Langrangian approach.” Boundary-Layer Meteorology, vol. 95, no. 1, Jan. 2000, pp. 91–122. Scopus, doi:10.1023/A:1002473906184.
Lai CT, Katul G, Ellsworth D, Oren R. Modelling vegetation-atmosphere CO2 exchange by a coupled Eulerian-Langrangian approach. Boundary-Layer Meteorology. 2000 Jan 1;95(1):91–122.
Journal cover image

Published In

Boundary-Layer Meteorology

DOI

ISSN

0006-8314

Publication Date

January 1, 2000

Volume

95

Issue

1

Start / End Page

91 / 122

Related Subject Headings

  • Meteorology & Atmospheric Sciences
  • 3701 Atmospheric sciences
  • 0401 Atmospheric Sciences