西安市1971—2011年浅层地温与气温、降水的季节关系特征分析

The Seasonal Characteristics of Relationship Among Shallow Geothermal,Temperature and Precipitation During 1971—2011 in Xi'an City

选用西安1971—2011年的逐月气温、降水、浅层地温观测资料,研究各要素季节变化趋势以及要素间的相关性,并建立关系模型.得出结论:①近40年西安春季和冬季平均气温升温明显,夏季平均降水量增加率最大;四季各浅层平均地温除夏季呈降温趋势外,其余三季均呈升温趋势,春季升温最快.②近40年西安气温与各浅层平均地温呈明显的正相关;春季、夏季浅层地温与降水呈明显负相关,冬季浅层地温与降水相关性不大.③建立四季地温与气温、降水的季节关系模型,并通过验证,得出冬季浅层地温与同期气温的拟合关系最好.

In this study, the author selected temperature, precipitation, shallow geothermal observations in year and monthly from 1971 to 2011 on Xi＇an, researched the change trend and the correlation in each dement, established the relational model. Concluded that： ①Spring and winter average temperature heating significantly in nearly 40a in Xi＇ an, summer average precipitation was the maximum rate of increase; the shallow geothermal in summer was average cooling trend, the other three quarters showed a warming trend, spring warming fastest. ②The temperatures and shallow average geothermal showed a significant positive correlation in nearly 40a in Xi＇ an; the shallow geothermal and precipitation showed a significant negative correlation in spring and summer, shallow ground temperature and precipitation in winter was not significantly related. ③The shallow geothermal, temperature and precipitation relational model in the season was established and verified, showing shallow geothermal and tem- perature at the same time fitting with the best relationship in winter.