Abstract: The CLIGEN (Climate Generator) is a model developed by the U.S.Department of Agriculture to provide daily meteorology data with long sequences.Whether it is applicable to the three provinces i.e.Heilongjiang,Jilin,and Liaoning of Northeast China has not been evaluated.In this paper,the temperature simulated by the CLIGEN was evaluated by daily meteorological data from 15 weather stations in Northeast China from 1981 to 2015.The extreme maximum and minimum temperatures,the numbers of days with temperature ≥ 35℃ and temperature ≤ 0℃ were evaluated at 72 sites in Northeast China.The results show that the CLIGEN performs very well in the simulations of daily average maximum and minimum temperatures,and the MAPE (mean absolute percent error) and effective coefficient (E) of 12 months range from 0.33% to 14.74%.The MAPE of the minimum temperature is basically within 10%.The effective coefficient E value is also very close ranging from 0.9880 to 0.9999.The CLIGEN has a good simulation effect on the mean value of daily temperature range,but not on the standard deviation of the daily temperature range.The features of continuity and gradual change in temperature fail to be simulated by the CLIGEN.In the aspects of simulation of extreme temperature and the number of days,only the number of days with the temperatures lower than 0℃ is simulated well.From the spatial distribution of temperature difference,it shows that the larger and more values are distributed in western parts of Jilin and Liaoning provinces.This paper provides a preliminary study to evaluate the application of the CLIGEN on the simulation of temperature over three provinces in Northeast China to meet relevant research needs.

Key words: CLIGEN, Three provinces in Northeast China, Temperature, Test, Difference