Uncoupled multi-layer model for the transfer of sensible and latent heat flux densities from vegetation |
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Authors: | J Chen |
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Institution: | (1) Department of Theoretical Production Ecology, Agricultural University, Bornsesteeg 65, 6708 PD Wageningen, The Netherlands;(2) Institute of Plant Physiology, Academia, Sinica, 300 Fenglin Road, Shanghai, China |
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Abstract: | The sensible heat flux density C and the latent heat flux density E are coupled in the case of a multi-layer model of vegetation. Therefore two linearly independent combinations of C and E, the enthalpy flux density H and the saturation heat flux density J, are introduced. Two electrical analogues, for H and J, are designed. They are equivalent to the resistance scheme for C and E, but uncoupled. Penman's formulas for C and E, which are applicable only to single-layer models, can be expressed equivalently in terms of H and J. This version of Penman's formulas can be extended easily to multi-layer canopies. |
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