Tunable diode laser measurements of methane fluxes from an irrigated rice paddy field in the Philippines
This paper presents the first micrometeorological‐based measurements of methane (CH4) emissions from Asian rice paddies of which we are aware. The research features the tunable diode laser trace gas analyzer system (TGAS) recently developed at the University of Guelph. CH4 fluxes were measured betwe...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal Article |
| Language: | Inglés |
| Published: |
American Geophysical Union
1995
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/166376 |
| _version_ | 1855542696424243200 |
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| author | Simpson, I.J. Thurtell, G.W. Kidd, G.E. Lin, M. Demetriades-Shah, T.H. Flitcroft, I.D. Kanemasu, E.T. Nie, D. Bronson, K.F. Neue, H.U. |
| author_browse | Bronson, K.F. Demetriades-Shah, T.H. Flitcroft, I.D. Kanemasu, E.T. Kidd, G.E. Lin, M. Neue, H.U. Nie, D. Simpson, I.J. Thurtell, G.W. |
| author_facet | Simpson, I.J. Thurtell, G.W. Kidd, G.E. Lin, M. Demetriades-Shah, T.H. Flitcroft, I.D. Kanemasu, E.T. Nie, D. Bronson, K.F. Neue, H.U. |
| author_sort | Simpson, I.J. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | This paper presents the first micrometeorological‐based measurements of methane (CH4) emissions from Asian rice paddies of which we are aware. The research features the tunable diode laser trace gas analyzer system (TGAS) recently developed at the University of Guelph. CH4 fluxes were measured between March 9 and 24, 1992, from an irrigated rice paddy field at the International Rice Research Institute (IRRI), the Philippines. The daytime CH4 flux averaged 6.0 μg m−2 s−1. The CH4 fluxes displayed a diurnal trend similar to daily soil temperature curves, with peak emissions of about 8 μg m−2 s−1 in the early afternoon. A tenfold increase in CH4 emissions (to about 70μg m−2 s−1) during a brief weeding experiment resulted from soil disturbance. Up to 25 μg m−2 s−1 of CH4 were released during a drying of the field, after which unsuitable soil redox potentials apparently suppressed methanogenesis. The CH4 flux was also arrested when the field was flooded with oxygen‐rich water during a heavy rainstorm. |
| format | Journal Article |
| id | CGSpace166376 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 1995 |
| publishDateRange | 1995 |
| publishDateSort | 1995 |
| publisher | American Geophysical Union |
| publisherStr | American Geophysical Union |
| record_format | dspace |
| spelling | CGSpace1663762025-05-14T10:40:02Z Tunable diode laser measurements of methane fluxes from an irrigated rice paddy field in the Philippines Simpson, I.J. Thurtell, G.W. Kidd, G.E. Lin, M. Demetriades-Shah, T.H. Flitcroft, I.D. Kanemasu, E.T. Nie, D. Bronson, K.F. Neue, H.U. methane field experimentation irri irrigated rice irrigation philippines rice field soil management weeding This paper presents the first micrometeorological‐based measurements of methane (CH4) emissions from Asian rice paddies of which we are aware. The research features the tunable diode laser trace gas analyzer system (TGAS) recently developed at the University of Guelph. CH4 fluxes were measured between March 9 and 24, 1992, from an irrigated rice paddy field at the International Rice Research Institute (IRRI), the Philippines. The daytime CH4 flux averaged 6.0 μg m−2 s−1. The CH4 fluxes displayed a diurnal trend similar to daily soil temperature curves, with peak emissions of about 8 μg m−2 s−1 in the early afternoon. A tenfold increase in CH4 emissions (to about 70μg m−2 s−1) during a brief weeding experiment resulted from soil disturbance. Up to 25 μg m−2 s−1 of CH4 were released during a drying of the field, after which unsuitable soil redox potentials apparently suppressed methanogenesis. The CH4 flux was also arrested when the field was flooded with oxygen‐rich water during a heavy rainstorm. 1995-04-20 2024-12-19T12:56:11Z 2024-12-19T12:56:11Z Journal Article https://hdl.handle.net/10568/166376 en American Geophysical Union Simpson, I. J.; Thurtell, G. W.; Kidd, G. E.; Lin, M.; Demetriades‐Shah, T. H.; Flitcroft, I. D.; Kanemasu, E. T.; Nie, D.; Bronson, K. F. and Neue, H. U. 1995. Tunable diode laser measurements of methane fluxes from an irrigated rice paddy field in the Philippines. J. Geophys. Res., Volume 100 no. D4 p. 7283-7290 |
| spellingShingle | methane field experimentation irri irrigated rice irrigation philippines rice field soil management weeding Simpson, I.J. Thurtell, G.W. Kidd, G.E. Lin, M. Demetriades-Shah, T.H. Flitcroft, I.D. Kanemasu, E.T. Nie, D. Bronson, K.F. Neue, H.U. Tunable diode laser measurements of methane fluxes from an irrigated rice paddy field in the Philippines |
| title | Tunable diode laser measurements of methane fluxes from an irrigated rice paddy field in the Philippines |
| title_full | Tunable diode laser measurements of methane fluxes from an irrigated rice paddy field in the Philippines |
| title_fullStr | Tunable diode laser measurements of methane fluxes from an irrigated rice paddy field in the Philippines |
| title_full_unstemmed | Tunable diode laser measurements of methane fluxes from an irrigated rice paddy field in the Philippines |
| title_short | Tunable diode laser measurements of methane fluxes from an irrigated rice paddy field in the Philippines |
| title_sort | tunable diode laser measurements of methane fluxes from an irrigated rice paddy field in the philippines |
| topic | methane field experimentation irri irrigated rice irrigation philippines rice field soil management weeding |
| url | https://hdl.handle.net/10568/166376 |
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