基于GRACE RL06数据探测华北平原水储量变化  

Water Storage Variation Inversion and Analysis in North China Plain Based on GRACE RL06

作　　者：何国庆 HE Guoqing(Shanghai Surveying and Mapping Institute,Shanghai 200063,China)

机构地区：[1]上海市测绘院,上海200063

出　　处：《地理空间信息》2022年第6期55-59,共5页Geospatial Information

摘　　要：利用CSR最新发布的GRACE RL06时变重力模型数据,反演了2002-08~2016-08华北平原水储量的时空变化,结合同时间段的GLDAS水文模型数据、Mascon数据及GPCC降水数据进行比较分析。结果表明华北平原水储量呈季节性变化,春夏水储量较少,秋冬较丰。在研究期间以1.38 cm/a的速率减少,空间上西南部减少速率大于东北部。GRACE与GLDAS和Mascon计算得到的华北平原水储量长期变化趋势基本一致,与GLDAS相关度达0.76,与Mascon相关度为0.94,三者都能探测到华北平原自然灾害的发生。GRACE反演水储量流量变化与GPCC降水数据具有较好的相关性,降雨是华北平原水储量变化的重要因素。We inversed the temporal and spatial water storage changes in the North China Plain from August 2002 to August 2016 using the latest CSR data of GRACE RL06. The terrestrial water storage change result obtained by RL06 were compared and analyzed with GLDAS hydrological model data, Mascon data and GPCC precipitation data. The results show that the terrestrial water storage of the North China Plain showed seasonal changes, with less terrestrial water storage in spring and summer, and abundant storage in autumn and winter. During the study period, the terrestrial water storage decreased at a rate of 1.38 cm/a. The rate of decrease in the southwest is greater than that in the northeast. The correlation coefficients of GRACE, GLDAS and Mascon are 0.76 and 0.94. GRACE, GLDAS and Mascon can detect the occurrence of natural disasters in the North China Plain. Precipitation is closely related to the change of terrestrial water and is an important factor for the terrestrial water storage changes of the North China Plain.

关 键 词：GRACE GLDAS 陆地水储量 华北平原 时空分布 

分 类 号：P228[天文地球—大地测量学与测量工程]