Abstract: Based on observed data at 11 weather stations around the Baiyangdian wetland from 1960 to 2013, variation of annual and seasonal temperature and precipitation was analyzed by methods of a linear equation, a Person coefficient, a rate analysis and a Morlet wavelet analysis.The results show that annual mean air temperature is in an increasing trend, so is winter and spring temperature.Mean air temperature in summer and autumn is in a decreasing trend.However, increasing and decreasing trends of air temperature are not significant.The amplitudes of air temperature fluctuation are obviously weaker in Baiyangdian than in the surrounding areas.It suggests that microclimate in the wetland significantly modulates climate change.On the other hand, precipitation is in an increasing trend in spring and autumn, while it is in a decreasing trend in winter and summer, so is annual precipitation.All trends are not significant, while annual precipitation is lower in Baiyangdian wetland than in the surrounding areas.Furthermore, there is a 3-year cycle for annual and seasonal air temperature from 1960s to 2000 in Baiyangdian wetland and a 5-year cycle for annual, spring and autumn air temperature.The cycle is 3 years for annual and seasonal precipitation in 1960s, and it is 4 years during 1980s to 1990s.

Key words: Baiyangdian wetland, Temperature, Precipitation, Wavelet analysis