Potential evapotranspiration is the theoretical upper limit value of actual evapotranspiration, which constitutes the important parameters for the research of regional thermal balance, water budget, water resources assessment and crop water requirements. Study on regional response of potential evapotranspiration to global climatic changes in China has significance in global hydrological cycling, energy balance and eco鄄environmental evolution research. Reference crop evapotranspiration (ET 0) as a common parameter is largely an evolution of definition of potential evapotranspiration and with the method of Penman鄄Monteith Model recommended by Food and Agriculture Organization for computing crop water requirements in 1998, reference crop evapotranspiration could be estimated quickly and accurately. Based on the daily observation data of the 56 meteorological stations in the North China Plain from 1960 to 2012, reference crop evapotranspiration were calculated, then the spatial鄄temporal variation patterns of reference crop evapotranspiration over North China Plain was

No abstract