李晓鹤 张诚 武方舒 李亚丽 杨宏伟

摘要為了全面分析天水55年来各深层地温的气候变化特征，利用天水国家气象观测站1964—2018年0.8、1.6、3.2 m逐月平均地温资料，对其变化规律进行研究。结果表明，1964—2018年天水各深层地温呈显著的上升趋势，其升温幅度为0.398～0.426 ℃/10 a。0.8、1.6 m 深层地温最大值出现在夏季，最小值出现在冬季;3.2 m深层地温最大值出现在秋季，最小值出现在春季。春、秋两季1.6 m土层平均地温的变化最活跃;夏、冬两季各层地温的变化特点正好相反，夏季深层平均地温随深度增加而降低，冬季则相反。气温和浅层地温与深层平均地温的年变化趋势呈显著正相关关系，在变化尺度上保持了高度的一致性。采用Mann-Kendall检验法检测天水各深层地温序列的突变现象发现，各深层平均地温在2001年前后均发生了突变，表明从2001年开始天水的深层平均地温进入了增高时期，以突变点2001年为界，增暖后时段的平均值比增暖前高0.37～0.52 ℃/10 a。

关键词深层地温;变化特征;Mann-Kendall检验;天水市

中图分类号P423文献标识码A

文章编号0517-6611（2020）04-0212-05

doi：10.3969/j.issn.0517-6611.2020.04.062

开放科学（资源服务）标识码（OSID）：

Analysis of the Variation Characteristics of Deep Layer Underground Temperature at Tianshui City from 1964 to 2018

LI Xiao-he1，2，ZHANG Cheng3，WU Fang-shu3 et al（1.Tianshui Meteorological Bureau，Tianshui，Gansu 741018;2.Tianshui Weather Modification Office，Tianshui，Gansu 741018;3.Zhangjiachuan Meteorological Bureau，Zhangjiachuan，Gansu 741500）

AbstractIn order to study the characteristics of deep layer underground temperature，the variation characteristics in every deep layer temperature had been analyzed with the data of underground temperature at 0.8 m，1.6 m，3.2 m on the Tianshui National Meteorological Observation Station from 1964 to 2018.The results showed that the deep layer temperature had been turned to arising from 1964 to 2018 and the range was from 0.398 ℃ to 0.426 ℃ every ten years.The peak value of underground temperature at 0.8 m and 1.6 m appeared at summer while its lowest value appeared at winter.The peak value of underground temperature at 3.2 m appeared in at autumn while its lowest value appeared at spring.The underground temperature at 1.6 m varies actively during spring and autumn.In summer and winter，the variation of ground temperature in each layer were just opposite which the temperature decrease with the depth in summer and increase with depth in winter.The underground temperature variation trend of the shallow layer and deep layer showed significant positive correlation and keep a high degree of consistency on the scale.The Mann-Kendall test was used to detect the abrupt changes in the underground temperature sequence of each layer in Tianshui.It was found that the average underground temperature in each of the deep layers changed abruptly around 2001，indicating that the deep average underground temperature in Tianshui had entered an increasing period since 2001.For the boundary，the average value after the warming period was 0.37-0.52 ℃/10 a higher than that before the warming.

Key wordsUndergroud temperature in deep layer;Variation characteristics;Mann-Kendall test;Tianshui City

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