Comparison of manual and automatic methods for measurement of methane emission from rice paddy fields (original) (raw)

Abstracts

The methane emission flux from rice paddies was simultaneously measured with automatic and manual methods in the suburban of Suzhou. Both methods were based on the static chamber / GC-FID techniques. Detail analysis of the experimental results indicates: a) The data of methane emission measured with the automatic method is reliable, b) About 11 or 19 o'clock of local time is recommended as the optimum sampling time for the manual spot measurement of methane emission from rice paddies. The methane emission fluxes measured by manual sampling at local time other than the optimum time have to be corrected. The correction coefficient may be determined by automatic and continuous measurement, c) In order to get a more accurate result, an empirical correction factor, such as 18%, is recommended to correct the seasonally total amount of measured methane emission by enlarging the automatically measured data or reducing the manually measured ones.

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Authors and Affiliations

1. Institute of Atmospheric Physics, Chinese Academy of Sciences, 100029, Beijing
   Zheng Xunhua, Wang Mingxing, Wang Yuesi, Shen Renxing & Li Jing
2. Fraunhofer Institute of Atmospheric Environmental Research, P D-82467, Garmisch, Germany
   J. Heyer & M. Kogge
3. Wuxian Institute for Agriculture Sciences, 215128, Suzhou, P. R. China
   Li Laotu & Jin Jisheng

Authors

1. Zheng Xunhua
2. Wang Mingxing
3. Wang Yuesi
4. Shen Renxing
5. Li Jing
6. J. Heyer
7. M. Kogge
8. Li Laotu
9. Jin Jisheng

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Xunhua, Z., Mingxing, W., Yuesi, W. et al. Comparison of manual and automatic methods for measurement of methane emission from rice paddy fields.Adv. Atmos. Sci. 15, 569–579 (1998). https://doi.org/10.1007/s00376-998-0033-5

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• Received: 02 April 1997
• Revised: 23 March 1998
• Issue date: December 1998
• DOI: https://doi.org/10.1007/s00376-998-0033-5

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