Barometer (PTB-210 at 28m and PTB101 at 1.5m, VAISALA, Finland)
Tipping bucket raingauge
29.6, 25.8, 20.1, 16.3, 10.5, 2.7m
Closed-path CO2/H2O analyzer (LI-6262, LI-COR, USA)
Tree heights, stand density, diameter,
Observation Period and data Availability
August 1999 to September 2003 and June 2004 to present
Katsumi Yamanoi (yamanoi [at] ffpri.affrc.go.jp) Yasuko Mizoguchi (pop128 [at] ffpri.affrc.go.jp) Hokkaido research center Forestry and Forest Products Researh Institute 7 Hitsujigaoka,Toyohira, Sapporo,Hokkaido 062-8516, Japan Tel: +81-11-590-5528 Fax: +81-11-851-4167
Kenzo Kitamura (kitamu93 [at] ffpri.affrc.go.jp) Yuichiro Nakai (nakaiyui [at] ffpri.affrc.go.jp) Department of meteorological Environment Forestry and Forest Products Researh Institute 1 Matsunosato, Tsukuba, Ibaraki 305-8687, Japan Tel:+81-298-873-3211 Fax:+81-298-874-3720
Closed-path CO2 analyzers were calibrated against CO2 standard gasses once a day.
Tower, Electrical power (100V AC 50Hz)
Research grant #199903 (1999-2002) of the Forestry and Forest Products Research Institute
RR2002 (2002-2006) of Ministry of Education, Culture, Sports, Science and Technology
Research Fund (Evaluation, Adaptation and Mitigation of Global Warming in Agriculture, Forestry and Fisheries：Research and Development) by Ministry of Agriculture, Forestry and Fisheries of Japan Grant-in-Aid for Scientific Research #193800950017 of JSPS
Global Environment Research Account for National Institutes of Ministry of the Environment Other Information
The forest around the tower received severe damage by the typhoon in September, 2003. Afterwards, the overturned trees have been left in the state of the nature. The observation was restarted in June, 2004.
Nakai Y., Kitamura K., Suzuki S. and Abe S. (2003) Year-long carbon dioxde exchange above a broadleaf deciduous forest in Sapporo, Northern Japan. Tellus, 55B, 305-312.
Watanabe T., Nakai Y., Kitamura K., Utsugi H., Tobita Hiroyuki., Ishizuka S. (2005) Scaling energy and CO2 fluxes from leaf to canopy using a Multilayered Implementation for Natural canopy-environment relations (MINCER). Phyton, 45, 353-360.
Utsugi H., Tobita H, Maruyama Y. and Ishizuka M. (2005) Spatial and Seasonal Variations in Leaf Mass per Area and Their Relationship to Leaf Nitrogen in a Secondary Northern Hardwood Forest in Japan. Phyton, 45, 245-251.
Ishizuka S, Sakata T, Sawata S, et al. (2006) High potential for increase in CO2 flux from forest soil surface due to global warming in cooler areas of Japan. Annals of Forest Science, 63 (5), 537-546.
Suzuki, S., Ishizuka, S., Kitamura, K., Yamanoi, K., Nakai, Y. (2006) Continuous estimation of winter carbon dioxide efflux from the snow surface in a deciduous broadleaf forest. Journal of Geophysical Research, 111(D17), D17101.