1959～2008年辽宁省浅层地温变化趋势分析

利用1959～2008年辽宁省0、5、15、20cm各层逐月平均地温,采用气候倾向率和累积距平气候统计方法,分析辽宁省各浅层地温年、月变化趋势及气候异常等特征。结果表明：各层年平均地温以0.171～0.823℃/10a的升温率显著上升。年代变化趋势存在共同的特征：20世纪60年代前期至中期变化平稳,20世纪60年代末期至70年代初期处于50年以来的低温期。20世纪70年代中期至21世纪初,尤其80年代以后,各浅层地温增温显著,其中21世纪初期处于50年以来的高温期。辽宁省近50年浅层5、10、15、20cm月平均地温4～10月异常年份较多,且异常偏暖年份明显多于异常偏冷年份。就年平均温度而言：异常年份较少。

Variations Trend of Soil Temperature at Shallow Layers in Liaoning Province in from 1959 to 2008

Using 0,5,15 and 20cm average soil temperature month by month in Liaoning Province from 1959 to 2008,montly and yearly variation trends and climate anomalies characteristics were analyzed by climate trend rate and cumulative anomaly climate statistical method. The result indicated that average soil temperature in each layer significantly increased. Heating rate is 0.171-0.823 ℃)/10a. Age trends have common characteristics. The soil temperature changes steadily in the earlier period to the intermediate stage of 1960s. The soil temperature is in early 50 years' low temperature time in late-1960s to the early 1970s. It various shallow layers soil temperature warming is remarkable in the mid-1970s to the 21st century 00 ages,especially after in the 1980s. The soil temperature has been in 50 year the high temperature times in 21st century initial period. 5,10,15 and 20 cm monthly soil temperature are more unusual year from April to October in Liaoning Province in the recent 50 years. The exceptionally warm year is more than exceptionally cold year. The average soil temperature anomaly years are few.