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Intercomparison of Chamber Methods for Soil Respiration Measurement in a Phytotron System  

Chae Namyi (Global Environment Laboratory/Department of Atmospheric Sciences College of Natural Sciences, Yonsei University)
Kim Rae-Hyun (Division of Environmental Science and Ecological Engineering, Korea University)
Hwang Taehee (Department of Environmental Planning, The Graduate School of Environmental Studies, Seoul National University)
Suh Sang-Uk (Department of Biological Sciences, College of Science, Konkuk University)
Lee Jae-Seok (Department of Biological Sciences, College of Science, Konkuk University)
Son Yowhan (Division of Environmental Science and Ecological Engineering, Korea University)
Lee Dowon (Department of Environmental Planning, The Graduate School of Environmental Studies, Seoul National University)
Kim Joon (Global Environment Laboratory/Department of Atmospheric Sciences College of Natural Sciences, Yonsei University)
Publication Information
Korean Journal of Agricultural and Forest Meteorology / v.7, no.1, 2005 , pp. 107-114 More about this Journal
Abstract
Soil CO₂ emission is one of the primary components in carbon balance of terrestrial ecosystems. In soil CO₂ flux measurements, chamber method is currently the most common technique. Prior to compare or synthesize the data collected from different chamber methods, potential biases must be quantified for each measurement system. We have conducted an intercomparison experiment among four closed dynamic chamber systems and an automatic open-closed chamber system in a temperature-controlled phytotron. Due to the disturbed CO₂ concentrations inside the phytotron during the measurements with closed dynamic chambers and the changes in soil water content, the interpretation of the data was difficult to quantify the biases of individual methods. However, the experiment provided not only valuable information on the performance characteristics of the five instruments to varying soil temperature and CO₂ concentration but also useful insights for better designs and strategy for future intercomparison in a controlled environment.
Keywords
Soil respiration; Chamber method; Intercomparison; Phytotron;
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