Radiation budget, soil heat flux and latent heat flux at the forest floor in warm, temperate mixed forest

✍ Scribed by Koji Tamai; Toshio Abe; Makoto Araki; Hiroki Ito

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 185 KB
• Volume: 12
• Category: Article
• ISSN: 0885-6087
• DOI: 10.1002/(sici)1099-1085(19981030)12:13/14<2105::aid-hyp723>3.0.co;2-9

✦ Synopsis

Seasonal changes in the radiation budget and soil heat ¯ux of a forest ¯oor 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 71 , for evergreen trees, and 12 . 46 m 2 ha 71 , for deciduous trees. The sky view factor was 16 and 22% at the survey site in the foliate and defoliate seasons, respectively. The small dierence between the sky view factor in the two seasons was re¯ected in the seasonal change in the radiation budget of the forest ¯oor. Namely, the net long-wave radiation changed rapidly in lea®ng 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 ¯ux at the forest ¯oor was estimated to be around 94 MJ m 72 annually, from our measurement with the simulation model.