关键词: 平流层温度, 对流层温度, 变化趋势, 突变分析, 新疆

Abstract:

On the basis of the daily temperature radiosonde data recorded by twelve stations in Xinjiang from 1961 to 2000, this paper analyzed the temperature change trend of sounding standard levels such as boundary layer, troposphere, tropopause and stratosphere by means of five-point smoothing method and linear correlation, also analyzed the correlation between troposphere and stratosphere and other typical layers, and the vertical distribution of annual temperature anomaly, then the abrupt change was tested by using the Mann-Kendall method. The results indicated that the stratospheric temperature over Xinjiang increased before 1980s and decreased afterward with a change curve like \!∧”. On the contrary, the tropospheric temperature changed with a like “V”. A significantly negative correlation existed between 30 hPa temperature and 300 hPa temperature, also between 50 hPa temperature and 400 hPa temperature, their significant level all arrived at 0.05 level. The temperature variation at 200 hPa and 250 hPa was stable. The vertical distribution of decadal temperature anomaly was negative at whole levels in 1970s, but negative in troposphere and positive in stratosphere in 1980s, with a variation curve like opposing \!S\". Contrarily, the vertical distribution of decadal temperature anomaly was positive in troposphere and negative in stratosphere in 1960s and 1990's, with a curve like \!S\". Analysis of abrupt change revealed that temperature at 30 hPa, 50 hPa, and 70 hPa originally went up before 1980's and then went down. At the same time, temperature at 250 hPa, 500 and 700 hPa and 2 m all originally descended and then increased around 1980's, 1987 and 1973, respectively, with significant level of 0.01.

Key words: stratospheric temperature, tropospheric temperature, change trend, analysis of abrupt change, Xinjiang