Intramolecular Stable Isotope Ratios of N2O in the Tropical Swamp Forest in Thailand |
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| Authors: | N Boontanon S Ueda P Kanatharana E Wada |
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| Institution: | (1) Center for Ecological Research, Kyoto University, Otsuka 509-3, Kamitanakami-hirano, Otsu, 520-2113, Japan e-mail: nok@ecology.kyoto-u.ac.jp Tel.: +81-77-5498200 Fax: +81-77-5498201, JP;(2) Laboratory for Chemistry, College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa, Kanagawa 252-8510, Japan, JP;(3) Faculty of Science, Prince of Songkla University, P.O. Box 3, Khohong, Hat Yai, Songkla 90112, Thailand, TH |
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| Abstract: | The dry-wet cycle is a common climatic phenomenon in the tropical regions of monsoon-affected Asia. An intermittent increase
in N2O was clearly observed in the Bang Nara River, with a tropical swamp catchment at the beginning of rainy season of November
1997. The intramolecular distribution of isotopes clearly demonstrated that nitrification is the major process for the production
of N2O. Using stable isotope data, the production mechanism of N2O in the study areas was found to vary in time and space with changes in the redox boundary along the water flow.
Received: 2 November 1999 / Accepted in revised form: 19 January 2000 |
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