The Difference of the temperature field in Chinese mainland in recent 30 years
In order to study the difference of the temperature field in Chinese mainland in recent 30 years,the analyses of inverse distance weight interpolation,sequence of the temperature isoline,terrain and variogram are implemented,based on quality control and division of temperature zone and by using the meteorological data of annual mean temperature of 662 national standard climatic station covering the whole country,the evolution process of Chinese inland temperature change in the time and spatial scale from 1981 to 2012 is obtained.The result shows that:(1) the annual mean temperature in Chinese inland shows an increasing trend and the change rate of temperature is (0.042 ± 0.006) ℃/a during 32 years;(2) during 32 years the ranges of five temperature zones in China have perturbation of different longitude and latitude.The dividing line between tropical and subtropical zone moves northward by 0.034 degrees along latitudes.The dividing line in west section between warm temperature zone and subtropical zone has a migration trend to southwestward and swings violently in south-north direction in east section.The dividing line between warm temperature zone and mid temperature zone has a migration trend to northwestward.The dividing line between mid warm temperature zone and cold temperature zone has a migration trend to northwestward and northeastward;(3) the variability of annual mean temperature in Chinese inland during 32 years in north is bigger than that in south.The variation coefficient in time series shows intense-lght-intense tendency.There are strong variant regions in northern,southwestern and parts of Tibetan Plateau;(4)a negative correlation is existed between temperature in Chinese inland and elevation.The change rate of temperature in Chinese inland and elevation is about 0.003℃/m,which is consistency with the characteristic of exponential function;(5) Chinese inland temperature still shows an increasing trend in the future,the current slight decline is only a local cyclical adjustment.
国家科技期刊平台
NSTL
万方数据
维普
