Based on monthly precipitation and temperature data of Zibo City over the years from 1966 to 2005,the spatial and temporal characteristics of precipitation and temperature in five districts and three counties of Zibo ...Based on monthly precipitation and temperature data of Zibo City over the years from 1966 to 2005,the spatial and temporal characteristics of precipitation and temperature in five districts and three counties of Zibo were analyzed by using climatic diagnosis methods including trend analysis and the method of Mexican-hat wavelet transform analysis. The results showed that the precipitation and temperature in Zibo experienced the interdecadal variations. The precipitation slowly increased at an average annual rate of 1.5 mm,and there existed multi-scale oscillation periods such as 32,25-29,10-23 a and quasi-5 a. Meanwhile,significant mutations were showed in 1977 and 1995. The precipitation was on the high side before 1977 and after 1995 while it was on the low side between 1977 and 1995. The yearly average temperature increased at the rate of 0.48 ℃/10 a,and there existed multi-scale oscillation periods such as 21-32,17-21,9-13 and 2-3 a. In addition,the significant mutation was showed in 1991. The temperature was colder before 1991 while after 1991,it was warmer. The results also indicated that the precipitation and temperature of Zibo City varied greatly in regional distribution,i.e.,the precipitation decreased gradually from south to north,and the temperature in the midst of Zibo City was higher than that in the south and the north,which could be divided into 3 types:south-based type,midst-based type and north-based type.展开更多
文摘Based on monthly precipitation and temperature data of Zibo City over the years from 1966 to 2005,the spatial and temporal characteristics of precipitation and temperature in five districts and three counties of Zibo were analyzed by using climatic diagnosis methods including trend analysis and the method of Mexican-hat wavelet transform analysis. The results showed that the precipitation and temperature in Zibo experienced the interdecadal variations. The precipitation slowly increased at an average annual rate of 1.5 mm,and there existed multi-scale oscillation periods such as 32,25-29,10-23 a and quasi-5 a. Meanwhile,significant mutations were showed in 1977 and 1995. The precipitation was on the high side before 1977 and after 1995 while it was on the low side between 1977 and 1995. The yearly average temperature increased at the rate of 0.48 ℃/10 a,and there existed multi-scale oscillation periods such as 21-32,17-21,9-13 and 2-3 a. In addition,the significant mutation was showed in 1991. The temperature was colder before 1991 while after 1991,it was warmer. The results also indicated that the precipitation and temperature of Zibo City varied greatly in regional distribution,i.e.,the precipitation decreased gradually from south to north,and the temperature in the midst of Zibo City was higher than that in the south and the north,which could be divided into 3 types:south-based type,midst-based type and north-based type.
