摘要
基于五道沟水文实验站1964-2020年长系列气象和地温观测资料,采用线性趋势回归方法,开展了近57年汛期、非汛期、年三个不同时间尺度和浅层、中层、深层不同深度地温变化特征研究,并分析了地温与气温和降水变化的响应关系。结果表明:(1)近57年,年尺度,浅层及中层呈上升趋势,深层地温变化不大。汛期浅、中、深各层地温以0.12-0.17℃/10a的速率减小;非汛期以0.07-0.29℃/10 a的速率增加。年代变化,浅层及中层地温呈先下降后上升趋势,深层地温变幅较小,呈现先上升后下降再上升。(2)年尺度及非汛期,各层地温与气温呈显著及低度正相关,与降水呈弱负相关,汛期与气温呈显著负相关,与降水呈低度相关。浅层20cm地温与气温相关性最强,5cm地温与降水相关性最强,地温与气温及降水的相关程度汛期均大于非汛期,同期均有浅层>中层>深层。
Based on the meteorological and ground temperature observations from Wudaogou Hydrological Experimental Station from 1964 to 2020,the linear trend regression method is adopted.In the past 57 years,the variation characteristics of ground temperature in flood season,non-flood season and year and in shallow depth,middle depth and deep depth were studied,and the response relationship between ground temperature and temperature and precipitation was analyzed.The results show that:(1)In recent 57 years,in annual scale,the ground temperature of shallow layer and middle layer shows an upward trend,The deep ground temperature changed little.In flood season,the ground temperature of shallow,middle and deep layers decreased at a rate of 0.12-0.17℃/10a.In the non-flood season,the rate increased from 0.07-0.29℃/10 a.In terms of chronological change,the ground temperature of shallow layer and middle layer decreased first and then increased,while the variation of deep layer temperature was small,which first increased,then decreased and then increased.(2)At the annual scale and in non-flood season,the ground temperature of each layer was significantly and moderately positive correlated with air temperature,and weakly negative correlated with precipitation;in flood season,the ground temperature was significantly and negatively correlated with air temperature,and moderately correlated with precipitation.The correlation degree between ground temperature and temperature and precipitation in flood season is greater than that in non-flood season.The correlation degree between ground temperature and temperature and precipitation in flood season is higher than that in non-flood season,and there are shallow>middle>deep layer in the same period.
作者
赵雯颉
鞠琴
张译尹
王玥
周超
胡永胜
曹青
ZHAO Wenjie;SJU Qin;ZHANG Yiyin;WANG Yue;ZHOU Chao;HU Yongsheng;CAO Qing(State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Hohai University,Nanjing 210098,China;China University of Geosciences,Beijing 100089,China;Anhui Provincial Water Resources Science Institute,Bengbu 233000,China;School of Hydrology and Water Resources,Nanjing University cf Information Science and Technology,Nanjing 210044,China)
出处
《水文》
CSCD
北大核心
2023年第1期102-107,共6页
Journal of China Hydrology
基金
国家自然科学基金资助项目(52179013)
国家重点研发计划资助项目(2021YFC3201104)
“一带一路”水与可持续发展科技基金资助项目(2020491211)。
关键词
地温
气温
降水
响应关系
五道沟实验站
ground temperature
air temperature
precipitation
response relationship
Wudaogou Hydrological Experimental Station
