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CO2 and Energy Exchange in a Rice Paddy for the Growing Season of 2002 in Hari, Korea  

Byung-Kwan Moon (Department of Atmospheric Sciences, Yonsei University)
Jinkyu Hong (Department of Atmospheric Sciences, Yonsei University, Laboratory for Atmospheric Modeling Research, Yonsei University)
Byoung-Ryol Lee (Department of Atmospheric Sciences, Yonsei University)
Jin I. Yun (Department of Ecosystem Engineering, Kyung Hee University)
Eun Woo Park (Department of Plant Pathology, Seoul National University)
Joon Kim (Department of Atmospheric Sciences, Yonsei University, Laboratory for Atmospheric Modeling Research, Yonsei University)
Publication Information
Korean Journal of Agricultural and Forest Meteorology / v.5, no.2, 2003 , pp. 51-60 More about this Journal
Abstract
Rice, which occupies about 60% of the farmland in Korea, is a staple crop in Asia. It not only absorbs $CO_2$ from the atmosphere, but also emits carbon in a form of CH$_4$. It has a potential role in the global budget of greenhouse gases because of its relative contributions of carbon absorption and emission associated with changing hydrologic cycle. To better understand its current and future role, seasonal variations of energy and $CO_2$ exchange in this critical ecosystem need to be quantified. The purpose of this study was to measure, document and understand the exchange of energy and $CO_2$ in a typical rice paddy in Korea throughout the whole growing season. Since late April of 2002, we have conducted measurements of energy and $CO_2$ exchange in a rural rice paddy at Hari site, one of the Korea regional network of tower flux measurement (KoFlux). After the quality control and gap-filling, the observed fluxes were analyzed in the context of micrometeorology and biophysics. $CO_2$ and energy exchanges varied significantly with land cover changes (e.g., plant growth stages), in addition to changes in weather and climate conditions. This study, reporting first direct measurement of energy and $CO_2$ exchange over a rice paddy in Korea, would serve as a useful database as one of the reference sites in AsiaFlux and FLUXNET.
Keywords
rice paddy; $CO_2$ flux; net ecosystem exchange; KoFlux; AsiaFlux;
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