DOI: 10.1016/j.atmosenv.2017.08.007
Scopus记录号: 2-s2.0-85026910844
论文题名: Assessing diel variation of CH4 flux from rice paddies through temperature patterns
作者: Centeno C ; A ; R ; , Alberto M ; C ; R ; , Wassmann R ; , Sander B ; O
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 167 起始页码: 23
结束页码: 39
语种: 英语
英文关键词: Diel CH4 fluxes
; Eddy covariance method
; Granger causality test
; Irrigated rice
Scopus关键词: Correlation methods
; Ecosystems
; CH4 flux
; Eddy covariance method
; Granger causality test
; Gross ecosystem photosynthesis
; High temporal resolution
; Irrigated rice
; Pearson correlation analysis
; Simple linear regression
; Statistical tests
; methane
; rain
; assessment method
; cropping practice
; diel variation
; eddy covariance
; environmental factor
; flux measurement
; Granger causality test
; irrigation
; methane
; paddy field
; rice
; temperature gradient
; temporal variation
; Article
; atmosphere
; canopy
; causality
; controlled study
; environmental factor
; growth curve
; hurricane
; landscape
; measurement
; plant growth
; priority journal
; rice
; seasonal rain forest
; seasonal variation
; soil temperature
; temperature
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: The diel variation in methane (CH4) flux from irrigated rice was characterized during the dry and wet cropping seasons in 2013 and 2014 using the eddy covariance (EC) technique. The EC technique has the advantage of obtaining measurements of fluxes at an extremely high temporal resolution (10Hz), meaning it records 36,000 measurements per hour. The EC measurements can very well capture the temporal variations of the diel (both diurnal and nocturnal) fluxes of CH4 and the environmental factors (temperature, surface energy flux, and gross ecosystem photosynthesis) at 30-min intervals. The information generated by this technique is important to enhance our mechanistic understanding of the different factors affecting the landscape scale diel CH4 flux. Distinct diel patterns of CH4 flux were observed when the data were partitioned into different cropping periods (pre-planting, growth, and fallow). The temporal variations of the diel CH4 flux during the dry seasons were more pronounced than during the wet seasons because the latter had so much climatic disturbance from heavy monsoon rains and occasional typhoons. Pearson correlation analysis and Granger causality test were used to confirm if the environmental factors evaluated were not only correlated with but also Granger-causing the diel CH4 flux. Soil temperature at 2.5 cm depth (Ts 2.5 cm) can be used as simple proxy for predicting diel variations of CH4 fluxes in rice paddies using simple linear regression during both the dry and wet seasons. This simple site-specific temperature response function can be used for gap-filling CH4 flux data for improving the estimates of CH4 source strength from irrigated rice production. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82363
Appears in Collections: 气候变化事实与影响
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作者单位: International Rice Research Institute, Los Baños, Laguna, Philippines; Karlsruhe Institute of Technology, Institute for Meteorology and Climate Research, Garmisch-Partenkirchen, Germany
Recommended Citation:
Centeno C,A,R,et al. Assessing diel variation of CH4 flux from rice paddies through temperature patterns[J]. Atmospheric Environment,2017-01-01,167