中山大学学报（自然科学版）（中英文）2024，Vol.63Issue(4)：29-36,8.DOI:10.13471/j.cnki.acta.snus.ZR20230044
热示踪法对广州城市化地下温度影响的辨识
The identification of the influence of heat tracing method on underground temperature in the urbanization process of Guangzhou
摘要
Abstract
The intrinsic energy exchange exists between the shallow ground temperature and near-sur-face air temperature.As time progresses,surface temperature changes are propagated downwards and superimposed onto the steady-state geothermal field.Therefore,it is possible to reconstruct the history of ground surface temperature changes using the current subsurface temperature profile.To assess the combined effect of global warming and urbanization on the subsurface temperature of Guangzhou,this paper collected temperature data from Guangzhou station during 1958-2022 and conducted regression analysis and anomaly analysis.Meanwhile,the temperature-depth(T-Z)profiles of 16 observation boreholes in Guangzhou were obtained through field measurements.By conducting regression analysis on the lower section of the temperature profile,the geothermal gradient of the area and the depth of de-viation from the constant geothermal gradient were determined.Finally,the onset time and magnitude of warming were obtained by combining temperature data,and the theoretical curves of the surface warming profile in Guangzhou were derived using the analytical solution equation.The results show that the warming rate of air temperature in Guangzhou from 1958 to 2022 is 0.33℃per decade,with the onset time of warming being 1987,and the magnitude of warming being 2.6℃.The observed geo-thermal gradient in Guangzhou is 0.036℃/m,and the depth of deviation from the constant geothermal gradient is 54.8 m,essentially consistent with the analytically calculated depth of 57.6 m.The study finds that the earlier the start time of urbanization-induced surface warming,the greater the depth of deviation of subsurface temperature from the constant geothermal gradient,indicating the depth of de-viation can be used to describe the process of urbanization.关键词
全球变暖/城市化/气温/地温/广州Key words
global warming/urbanization/air temperature/ground temperature/Guangzhou分类
天文与地球科学引用本文复制引用
连健斌,李绍恒,陈建耀,龚柔艳,梁贝竹,董林垚..热示踪法对广州城市化地下温度影响的辨识[J].中山大学学报（自然科学版）（中英文）,2024,63(4):29-36,8.基金项目
国家重点研发项目(2023YFC3709002) （2023YFC3709002）
国家自然科学基金(41977171) （41977171）
广东省区域联合基金(2021A1515110505) （2021A1515110505）
