A Heat-Balance Model with a Canopy of One or Two Layers and its Application to Field Experiments

Takeshi Yamazaki Geophysical Institute, Tohoku University, Sendai, Japan

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Junsei Kondo Geophysical Institute, Tohoku University, Sendai, Japan

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Tsutomu Watanabe Geophysical Institute, Tohoku University, Sendai, Japan

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Takeshi Sato Shinjo Branch of Snow and Ice Studies, National Research Institute for Earth Science and Disaster Prevention, Shinjo, Japan

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Abstract

A heat-balance model having a canopy of one or two layers has been developed. The calculated fluxes using the present model were found to be in agreement with measurements from a rice paddy field, an orchard, and the calculated fluxes of a multilayer model. Although there was some difference in the calculated fluxes between the one- and two-layer model was the one-layer model was found to be sufficient when the dependency of the radiative ground-surface temperature on the viewing angle was not considered.

Abstract

A heat-balance model having a canopy of one or two layers has been developed. The calculated fluxes using the present model were found to be in agreement with measurements from a rice paddy field, an orchard, and the calculated fluxes of a multilayer model. Although there was some difference in the calculated fluxes between the one- and two-layer model was the one-layer model was found to be sufficient when the dependency of the radiative ground-surface temperature on the viewing angle was not considered.

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