Tunable diode laser measurements of methane fluxes from an irrigated rice paddy field in the Philippines

Vista sencilla de ítem
dc.creatorSimpson, I.J.
dc.creatorThurtell, G.W.
dc.creatorKidd, G.E.
dc.creatorLin, M.
dc.creatorDemetriades-Shah, T.H.
dc.creatorFlitcroft, I.D.
dc.creatorKanemasu, E.T.
dc.creatorNie, D.
dc.creatorBronson, K.F.
dc.creatorNeue, H.U.
dc.date1995-04-20
dc.date2024-12-19T12:56:11Z
dc.date2024-12-19T12:56:11Z
dc.date.accessioned2026-06-27T04:16:03Z
dc.descriptionThis 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.
dc.identifierhttps://hdl.handle.net/10568/166376
dc.identifier.urihttp://hdl.handle.net/123456789/27113
dc.languageen
dc.publisherAmerican Geophysical Union
dc.sourceSimpson, 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
dc.subjectmethane
dc.subjectfield experimentation
dc.subjectirri
dc.subjectirrigated rice
dc.subjectirrigation
dc.subjectphilippines
dc.subjectrice field
dc.subjectsoil management
dc.subjectweeding
dc.titleTunable diode laser measurements of methane fluxes from an irrigated rice paddy field in the Philippines
dc.typeJournal Article

Archivos

Colecciones

Instituto Internacional de Investigación del Arroz (IRRI)