論文

査読有り
2016年10月

Prediction of future methane emission from irrigated rice paddies in central Thailand under different water management practices

SCIENCE OF THE TOTAL ENVIRONMENT
  • Kazunori Minamikawa
  • ,
  • Tamon Fumoto
  • ,
  • Toshichika Iizumi
  • ,
  • Nittaya Cha-un
  • ,
  • Uday Pimple
  • ,
  • Motoki Nishimori
  • ,
  • Yasushi Ishigooka
  • ,
  • Tsuneo Kuwagata

566
開始ページ
641
終了ページ
651
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.scitotenv.2016.05.145
出版者・発行元
ELSEVIER SCIENCE BV

There is concern about positive feedbacks between climate change and methane (CH4) emission from rice paddies. However, appropriate water management may mitigate the problem. We tested this hypothesis at six field sites in central Thailand, where the irrigated area is rapidly increasing. We used DNDC-Rice, a process-based biogeochemistry model adjusted based on rice growth data at each site to simulate CH4 emission from a rice-rice double cropping system from 2001 to 2060. Future climate change scenarios consisting of four representative concentration pathways (RCPs) and seven global climate models were generated by statistical downscaling. We then simulated CH4 emission in three water management practices: continuous flooding (CF), single aeration ( SA), andmultiple aeration ( MA). The adjusted model reproduced the observed rice yield and CH4 emission well at each site. The simulated CH4 emissions in CF from 2051 to 2060 were 5.3 to 7.8%, 9.6 to 16.0%, 7.3 to 18.0%, and 13.6 to 19.0% higher than those from 2001 to 2010 in RCPs 2.6, 4.5, 6.0, and 8.5, respectively, at the six sites. Regionally, SA andMA mitigated CH4 emission by 21.9 to 22.9% and 53.5 to 55.2%, respectively, relative to CF among the four RCPs. These mitigation potentials by SA and MA were comparable to those from 2001 to 2010. Our results indicate that climate change in the next several decades will not attenuate the quantitative effect of water management practices on mitigating CH4 emission from irrigated rice paddies in central Thailand. (C) 2016 Elsevier B.V. All rights reserved.

リンク情報
DOI
https://doi.org/10.1016/j.scitotenv.2016.05.145
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000381060900066&DestApp=WOS_CPL
ID情報
  • DOI : 10.1016/j.scitotenv.2016.05.145
  • ISSN : 0048-9697
  • eISSN : 1879-1026
  • Web of Science ID : WOS:000381060900066

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