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Original Research Papers

Automated foliage chamber method for long-term measurement of CO2 flux in the uppermost canopy

Authors:

Takafumi Miyama ,

Kansai Research Center, Forestry and Forest Products Research Institute, 68 Nagaikyutaro, Momoyama, Fushimi, Kyoto 612-0855, JP
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Yuji Kominami,

Kansai Research Center, Forestry and Forest Products Research Institute, 68 Nagaikyutaro, Momoyama, Fushimi, Kyoto 612-0855, JP
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Koji Tamai,

Kansai Research Center, Forestry and Forest Products Research Institute, 68 Nagaikyutaro, Momoyama, Fushimi, Kyoto 612-0855, JP
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Tatsuhiko Nobuhiro,

Forestry and Forest Products Research Institute, 1 Matsunosato, Kukizaki, Inashiki, Ibaraki 305-8687, JP
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Yoshiaki Goto

Kansai Research Center, Forestry and Forest Products Research Institute, 68 Nagaikyutaro, Momoyama, Fushimi, Kyoto 612-0855, JP
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Abstract

Direct monitoring of CO2 exchange in forest ecosystems is necessary for evaluation of the annual net CO2 flux. We developed an automated foliage chamber system for long-term in situ measurement of the CO2 flux in foliage. The chamber closes automatically for 5 min in every 30. We found a high correlation between the photosynthesis rates measured by this system and by a portable H2O/CO2 analyzer (LCA-3, ADC). We used the new system to continuously monitor the CO2 flux in foliage of Quercus serrata. There was a positive correlation between CO2 flux and short-wave radiation. The daily photosynthesis rate varied widely depending on the environmental conditions. It increased from May to July and decreased temporarily in August. The seasonal pattern of photosynthesis was almost the same as that measured by the eddy covariance method. These results suggest that the new system is effective for tracking long-term seasonal change of the CO2 flux in foliage.

How to Cite: Miyama, T., Kominami, Y., Tamai, K., Nobuhiro, T. and Goto, Y., 2003. Automated foliage chamber method for long-term measurement of CO2 flux in the uppermost canopy. Tellus B: Chemical and Physical Meteorology, 55(2), pp.322–330. DOI: http://doi.org/10.3402/tellusb.v55i2.16692
  Published on 01 Jan 2003
 Accepted on 2 Sep 2002            Submitted on 2 Jan 2002

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