基于ITA的三峡库区地温时空演变格局  

Spatial and Temporal Evolution Pattern of Ground Temperature in Three Gorges Reservoir Area Based on ITA

作　　者：叶琰[1] 翁薛柔 马黎华[1,3] 叶勇 龙训建[1] YE Yan;WENG Xuerou;MA Lihua;YE Yong;LONG Xunjian(College of Resources and Environment,Southwest University,Chongqing 400715,China;School of Geography and Planning,Sun Yat-sen University,Guangzhou 510006,China;Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin,Chongqing 400715,China)

机构地区：[1]西南大学资源环境学院,重庆400715 [2]中山大学地理科学与规划学院,广州510006 [3]长江经济带农业绿色发展研究中心,重庆400715

出　　处：《西南大学学报（自然科学版）》2023年第8期151-164,共14页Journal of Southwest University(Natural Science Edition)

基　　金：国家自然科学基金项目(42107347);重庆市教育委员会科学技术研究项目(KJZD-K202100201).

摘　　要：自2003年三峡工程蓄水以来,库区地表水陆面积占比发生变化,水热条件需适应新的空间格局.为探讨三峡工程建设前后库区范围地表温度的时空演变特征,以三峡库区1981-2014年21个气象站的日地表温度为研究数据,利用创新趋势分析(Innovative Trend Analysis,ITA)方法的微趋势识别优势,探讨研究区内地表温度在不同尺度的时空格局特征.结果表明:①三峡库区平均、最高和最低地表温度在研究时段内均呈增加趋势,区域内温差分布特征为西北高、东南低;②以2003年为蓄水分界时期,对比前后地表温度变化特征,显示蓄水前平均地表温度多呈增加趋势,而蓄水后增加速度放缓,距离三峡大坝最近的区域E放缓程度最为明显,蓄水后平均、最高和最低地表温度分别增加了0.52,0.94,0.71℃,其中分区D增加幅度最大,平均地表温度增加4.68%,最高地表温度增加9.35%;③在年内的水位变动期,4-5月和9-10月的日平均地表温度较蓄水前增加了0.42℃和0.50℃,但统计参数表明,研究区在三峡水库蓄水前后,两个时段内的平均地表温度表现出不同的变化趋势.研究结果可为改善三峡库区生态建设、土地利用规划、环境保护等提供理论参考.Since the impoundment of the Three Gorges Project in 2003,the proportion of surface water and land area in the reservoir area has changed.The hydrothermal environment of the Three Gorges Reservoir area needs to adapt to the new spatial pattern.In order to explore the spatiotemporal evolution characteristics of the surface temperature in the reservoir area before and after the construction of the Three Gorges project,the paper takes the daily surface temperature of 21 meteorological stations in the Three Gorges Reservoir area from 1981 to 2014 as the basic data,and uses the innovative trend analysis(ITA)method with the advantage of micro trend identification to explore the spatiotemporal pattern of the surface temperature in the research area at different scales.The results show that:①The average,maximum and minimum surface temperatures in the Three Gorges Reservoir area all showed an increasing trend in the study period.The spatial distribution characteristics of the difference between the maximum and minimum surface temperatures in the region were high in the northwest and low in the southeast.②Taking 2003 as the time dividing point,the variation characteristics of surface temperature in the Three Gorges Reservoir area before and after impoundment are compared.The average surface temperature tended to increase before impoundment,but the increase speed slowed down after impoundment.The area E closest to the Three Gorges Dam had the most obvious slow down.After impounding,the average,maximum and minimum surface temperatures increased by 0.52,0.94,0.71℃,respectively.Among them,area D increased the most,the average surface temperature increased by 4.68%,and the maximum surface temperature increased by 9.35%.③During the water level fluctuation period,the daily average surface temperature in the two periods of April-May and September-October increased by 0.42℃and 0.50℃,respectively,compared with that before water storage.However,the statistical parameters show that the average surface temperature in the st

关 键 词：地表温度 三峡水库 创新趋势分析法ITA 时空演变 

分 类 号：P423.7[天文地球—大气科学及气象学]