Climate Change and Its Impact on Ecological Environment in Western Liaoning in Recent 50 years

Based on the observation data of meteorological stations in western Liaoning from 1971 to 2020,the trend,Morlet wavelet,MK mutation and other methods were used to analyze the data.The results show that the annual average temperature of western Liaoning was 9.29℃;the annual average precipitation was 542.2 mm,and the trend change was not obvious;the temperature had obvious quasi-13-year,quasi-19-year and quasi-45-year cycles,and the precipitation had quasi-3-year,quasi-6-year,quasi-14-year and quasi-29-year cycles;there was a sudden change in temperature in 1990,and the warming was significant after the sudden change;the typical abrupt changes of precipitation occurred in 1979 and 2000,but the abrupt changes were not significant.