AI SearchEstimation of methane and nitrous oxide emissions from rice fields in Thailand
Call Number: AIT Thesis no. EV-94-25 Material type:
SeriesSeries: Asian Institute of Technology. Thesis ; no. EV-94-25Publication details: Bangkok : Asian Institute of Technology, 1994Description: 59 leavesSubject(s): Online resources: Dissertation note: Thesis (M.Sc.) - Asian Institute of Technology, 1994 Summary: Methane (CH4) and nitrous oxide (N20) are two important greenhouse gases. Nitrous oxide is also responsible for depletion of the stratospheric ozone layer. Rice fields are a major source of anthropogenic methane emission and possibly play a role in nitrous oxide emission due to increasing use of nitrogen fertilizers around the world. In this study, emissions of methane and nitrous oxide have been measured in a Thai rice field . Clear patterns of diurnal emission variations of both gases have been observed, which were found to generally follow the diurnal variation of the soil temperature. A detailed explanation is given to explain the occurrence of a methane emission peak at night. The effects of urea fertilization and field draining on emissions of the two gases are discussed. Methane emission from Thai rice fields is estimated to be 3.32 Tg CH4 (2.49 Tg CH4-C) each year, contributing about 3.4% to global methane budget due to rice cultivation. Finally, mitigation options for methane emission from rice fields are put forward.
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Asian Institute of Technology Library AIT Publications | AIT Thesis no. EV-94-25 (Browse shelf(Opens below)) | 2 | Available | 30050004932652 | |||||||||||||
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Asian Institute of Technology Library Archives | AIT Thesis no. EV-94-25 (Browse shelf(Opens below)) | Available | 30050160055355 |
A thesis submitted in partial fulfilment of the requirement for the degree of Master of Science, School of Environment, Resources & Development
Thesis (M.Sc.) - Asian Institute of Technology, 1994
Methane (CH4) and nitrous oxide (N20) are two important greenhouse gases. Nitrous oxide is also responsible for depletion of the stratospheric ozone layer. Rice fields are a major source of anthropogenic methane emission and possibly play a role in nitrous oxide emission due to increasing use of nitrogen fertilizers around the world. In this study, emissions of methane and nitrous oxide have been measured in a Thai rice field . Clear patterns of diurnal emission variations of both gases have been observed, which were found to generally follow the diurnal variation of the soil temperature. A detailed explanation is given to explain the occurrence of a methane emission peak at night. The effects of urea fertilization and field draining on emissions of the two gases are discussed. Methane emission from Thai rice fields is estimated to be 3.32 Tg CH4 (2.49 Tg CH4-C) each year, contributing about 3.4% to global methane budget due to rice cultivation. Finally, mitigation options for methane emission from rice fields are put forward.
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