Premium
Radiation budget, soil heat flux and latent heat flux at the forest floor in warm, temperate mixed forest
Author(s) -
Tamai Koji,
Abe Toshio,
Araki Makoto,
Ito Hiroki
Publication year - 1998
Publication title -
hydrological processes
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.222
H-Index - 161
eISSN - 1099-1085
pISSN - 0885-6087
DOI - 10.1002/(sici)1099-1085(19981030)12:13/14<2105::aid-hyp723>3.0.co;2-9
Subject(s) - forest floor , latent heat , environmental science , flux (metallurgy) , evergreen , basal area , temperate climate , heat flux , atmospheric sciences , temperate forest , shortwave radiation , deciduous , earth's energy budget , radiation , ecology , soil water , forestry , geography , geology , meteorology , heat transfer , soil science , biology , physics , quantum mechanics , thermodynamics , materials science , metallurgy
Seasonal changes in the radiation budget and soil heat flux of a forest floor were measured in a mixed forest located in Kyoto, Japan. The basal area at breast height in the survey forest was about 15·82 m 2 ha −1 , for evergreen trees, and 12·46 m 2 ha −1 , for deciduous trees. The sky view factor was 16 and 22% at the survey site in the foliate and defoliate seasons, respectively. The small difference between the sky view factor in the two seasons was reflected in the seasonal change in the radiation budget of the forest floor. Namely, the net long‐wave radiation changed rapidly in leafing and falling days, and the rate of net short‐wave radiation was highest in April. The distinctive characteristic of the radiation budget was that the rates of available radiation in the daytime and at night were almost equal in September and October. Latent heat flux at the forest floor was estimated to be around 94 MJ m −2 annually, from our measurement with the simulation model. Copyright © 1998 John Wiley & Sons, Ltd.