基于GRACE/GRACE-FO反演华北平原2002—2021年水储量变化  

Inversion of water reserves in North China Plain from 2002 to 2021 based on GRACE/GRACE-FO

作　　者：赵婷婷 章传银[1] 王伟[1] 蒋涛[1] 李婉秋 肖思腾 ZHAO Tingting;ZHANG Chuanyin;WANG Wei;JIANG Tao;LI Wanqiu;XIAO Siteng(Chinese Academy of Surveying and Mapping,Beijing 100036,China;School of Surveying and Mapping Geographic Information,Shandong Jianzhu University,Jinan 250101,China;Institute of Precision Measurement Science and Technology Innovation,Chinese Academy of Sciences,Wuhan 430077,China;School of Geomatics,Liaoning Technical University,Fuxin,Liaoning 123000,China)

机构地区：[1]中国测绘科学研究院,北京100036 [2]山东建筑大学测绘地理信息学院,济南250101 [3]中国科学院精密测量科学与技术创新研究院,武汉430077 [4]辽宁工程技术大学测绘与地理科学学院,辽宁阜新123000

出　　处：《测绘科学》2023年第8期18-26,共9页Science of Surveying and Mapping

基　　金：国家重点研发计划项目(2020YFB05058020);中国测绘科学研究院基本科研业务费项目(AR2210,AR2301);山东省自然科学基金项目(ZR2022QD025);中国科学院精密测量科学与技术创新研究院大地测量与地球动力学国家重点实验室资助项目(SKLGED2023-1-1)。

摘　　要：针对华北平原水资源分布不均的问题,该文利用2002年4月—2021年12月共237个月的重力恢复和气候实验(GRACE)卫星、GRACE-FO卫星重力数据对华北平原的水储量变化情况进行了研究,采用奇异谱插值填补GRACE与GRACE-FO间的空白期数据,并联合3家Mascon产品、全球陆面同化系统水文模型与全球降水气候中心降水数据进行综合性比较和分析,实现了对华北地区水储量时空变化情况的探究。结果表明,华北地区陆地水储量整体呈下降趋势,亏损速率为-0.9276cm/a,且具有明显的季节特征,与降水量的变化情况一致,经过相关性分析,GRACE、GRACE-FO与3个Mascon产品反演的水储量变化存在较高的相关性,相关系数均在0.89以上。Aiming at the problem of the uneven distribution of water resources in the North China Plain,this paper studied the change of water reserves in the North China Plain using 237 months of gravity recovery and climate experiment(GRACE)and GRACE-FO satellite gravity data from April 2002 to December 2021.Singular spectrum interpolation was used to fill the gap between GRACE and GRACE-FO data,and three Mascon products,global land data assimilation system hydrological model and Global Precipitation Climate Center precipitation data were combined for comprehensive comparison and analysis.Exploring the spatiotemporal changes in water reserves in North China had been achieved.The results showed that the overall land water reserves in North China were showing a decreasing trend,with a loss rate of-0.9276 cm/a,and had obvious seasonal characteristics that were consistent with the changes in precipitation.After correlation analysis,GRACE,GRACE-FO and the water reserve changes inverted by the three Mason products had a high correlation,with correlation coefficients above O.89.

关 键 词：重力恢复和气候实验 Mascon 水储量 华北平原 奇异谱分析 

分 类 号：P223[天文地球—大地测量学与测量工程]