DOI: 10.2166/wcc.2015.217
论文题名: Clustering analysis of regional reference evapotranspiration and its components based on climatic variables across northeast China, 1961–2010
作者: Liu Y. ; Liu B. ; Yang X. ; Bai W.
刊名: Journal of Water and Climate Change
ISSN: 20402244
出版年: 2016
卷: 7, 期: 1 起始页码: 128
结束页码: 141
语种: 英语
英文关键词: Climatic variable
; Clustering analysis
; Northeast China
; Penman-Monteith equation
; Reference evapotranspiration
; Thermodynamic and aerodynamic components
英文摘要: Evapotranspiration integrates atmospheric demand and surface conditions. The Penman-Monteith equation was used to calculate annual and seasonal reference evapotranspiration (ET0) and thermodynamic and aerodynamic components (ETrad and ETaero) at 77 stations across northeast China, 1961–2010. The results were: (1) annual ETrad and ETaero had different regional distribution, annual ETrad values decreased from south to north, whereas the highest ETaero values were recorded in the eastern and western regions, the lowest in the central region; (2) seasonal ETaero distributions were similar to seasonal ET0, with a south–north longitudinal pattern, while seasonal ETrad distributions had a latitudinal east-west pattern; and (3) in the group for ET0 containing 69 sampling stations, effects of climatic variables on ET0 followed sunshine hours>relative humidity>maximum temperature>wind speed. Changes in sunshine hours had the greatest effect on ETrad, but wind speed and relative humidity were the most important variables to ETaero. The decline in sunshine duration, wind speed, or both over the study period appeared to be the major cause of reduced potential evapotranspiration in most of NEC. Wind speed had opposite effects on ETrad and ETaero, and therefore the effect of wind speed on ET0 was not significant. © IWA Publishing 2016. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/67612
Appears in Collections: 气候减缓与适应
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作者单位: Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, China; Key Laboratory of Agricultural Environment, Ministry of Agriculture, Beijing, China; National Engineering Laboratory of Efficient Water, Use Crop Disaster Prevention, Beijing, China
Recommended Citation:
Liu Y.,Liu B.,Yang X.,et al. Clustering analysis of regional reference evapotranspiration and its components based on climatic variables across northeast China, 1961–2010[J]. Journal of Water and Climate Change,2016-01-01,7(1)