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[E-3.1 Quantification of micro-meteorological processes in tropical forest]

[Contact Person]

TANI Makoto
Laboratory Chief, Forest Meteorology
Forestry and Forest Products Research Institute
Ministry of Agriculture, Forestry and Fisheries
P.O. Box 16, Tsukuba Norin Kenkyu Danchi-Nai, Ibaraki 305 Japan
Phone +81-298-73-3211, Fax +81-298-73-1542
E-mail tani3@ffpri.affrc.go.jp

[Reaseach Staff]
TANI Makoto, OHTANI Yoshikazu, OKANO Michiaki, YAMANOI Katsumi, WATANABE Tsutomu, NOGUCHI Shoji and SAMMORI Toshiaki
(Forestry and Forest products Research Institute)
FURUKAWA Akio, KACHI Naoki^*
(National Institute of Environmental Studies)
(^* Present address: Tokyo Metropolitan University)
Abdul Rahim Nik, Zulkifli Yusop, Baharuddin Kasran, Saifuddin Sulaiman, CHAN Hung Tuck, YAP Son Kheong
(Forest Research Institute of Malaysia)
Muhammad Awang, Ahmad Makmom Abdullah
(Universiti Pertanian Malaysia)

[Total Budget for FY1993-1995]

49,904,000 Yen (FY1995 15,323,000 Yen)

[Abstract]

　Micro-meteorology and exchange processes of energy, water and carbon dioxide between a tropical rain forest and the atmosphere were monitored in Pasoh Forest Reserve in Peninsular Malaysia. The meteorological monitoring gave essential information on vertical distributions of air temperature, vapor pressure and wind velocity within and above the forest canopy. Energy storage within a forest canopy was calculated from the distributions. Seasonal variation in albedo was obtained from the monitoring. Sensible and latent heat fluxes were estimated through Bowen ratio method. Almost all available energy was distributed to latent heat during wet conditions, but the ratio of latent heat to the available energy decreased in dry conditions. An eddy correlation observation was also conducted to measure the fluxes. Although the statistical structures of the wind component were not suitable for the calculation of the eddy correlation fluxes, the carbon dioxide flux above the forest canopy as well as the sensible and latent heat fluxes was estimated through the method.

[Key Words]

Tropical Forest, Micro-Meteorology, Energy Exchange, Eddy Correlation Method