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

Takafumi Miyama; Yuji Kominami; Koji Tamai; Tatsuhiko Nobuhiro; Yoshiaki Goto

doi:10.3402/tellusb.v55i2.16692

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

Tellus B: Chemical and Physical Meteorology

Volume 55 (2003): Issue 2

By: Takafumi Miyama, Yuji Kominami, Koji Tamai, Tatsuhiko Nobuhiro and Yoshiaki Goto

Open Access

|Jan 2003

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.

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Articles in this issue

DOI: https://doi.org/10.3402/tellusb.v55i2.16692 | Journal eISSN: 1600-0889

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Language: English

Page range: 322 - 330

Submitted on: Jan 2, 2002

Accepted on: Sep 2, 2002

Published on: Jan 1, 2003

Published by: Stockholm University Press

In partnership with: Paradigm Publishing Services

© 2003 Takafumi Miyama, Yuji Kominami, Koji Tamai, Tatsuhiko Nobuhiro, Yoshiaki Goto, published by Stockholm University Press
This work is licensed under the Creative Commons Attribution 4.0 License.

Volume 55 (2003): Issue 2