气候变暖特征分析及对深层地温和冻土的影响

Analysis on the Characteristics of Climate Warming and Its Influence on Deep Ground Temperature and Permafrost

为了研究区域性气候变暖特征及其对深层地温和冻土的影响,运用气候倾向率分析方法,分析了辽宁西部地区1961—2010年不同时间尺度的气温变化、深层地温和冻土深度变化趋势。结果表明:辽西地区气候变暖明显,年平均气温倾向率为0.371℃/10 a,变暖区间主要出现在9月至翌年2月间,冬季是气候变暖的主体,倾向率高达0.778℃/10 a。气候变暖对深层地温和最大冻土深度的影响达到极显著水平(P<0.01),年平均气温升高1℃,深层平均地温随之升高0.5℃;秋冬季气温升高1℃,冻土深度变浅5.8 cm;深层地温倾向率为0.258℃/10 a,最大冻土深度倾向率为-4.095 cm/10 a。研究结果可为辽宁西部地区工农业可持续发展及气候资源开发利用提供依据。

In order to study the characteristics of regional warming and its influence on deep ground temperature and permafrost, the author adopted climate trend rate analysis method to analyze the changes in temperature, deep ground temperature and permafrost depth in western Liaoning at the different time scales from 1961 to 2010. The results showed that： in western Liaoning, the climate was trending to become warming, the annual average temperature tendency rate was 0.371°C/10 a, the climate warming period appeared mainly from September to February, winter was a main season of climate warming, the trend rate was up to 0.778℃ /10 a. The impact of climate warming made significant influence on deep ground temperature and maximum depth of permafrost（P0.01）, as annual average temperature increased by 1℃, the average ground temperature of deep soil increased by 0.5℃; in autumn, the temperature increased by 1℃, the depth of permafrost reduced by 5.8 cm; the trend rate of deep ground temperature was 0.258℃/10 a, the trend rate of maximum depth of permafrost was-4.095 cm/10 a. The above results could be used as the basis of development and utilization of climate resources and sustainable development of industry and agriculture in western Liaoning.