| 利用新版GRACE时变模型反演珠江流域陆地水储量变化 |
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| 引用本文： | 陈智伟,张兴福,冉将军,胡波,周波阳.利用新版GRACE时变模型反演珠江流域陆地水储量变化[J].大地测量与地球动力学,2020,40(3):305-310. |
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| 作者姓名： | 陈智伟 张兴福 冉将军 胡波 周波阳 |
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| 作者单位： | 广东工业大学土木与交通工程学院;南方科技大学理学院 |
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| 基金项目： | 国家自然科学基金(41674006,41731069)~~ |
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| 摘 要： | 本文以CSR05、GFZ05、JPL05、ITSG-Grace2016、CSR06、GFZ06、JPL06及ITSG-Grace2018等8种GRACE时变重力场模型作为研究对象，通过300 km高斯滤波和Swenson方法等数据处理策略去除时变模型的噪声，反演2005-01~2012-12珠江流域的陆地水储量变化，并利用ITSG-Grace2018模型、GLDAS水文模型、降水数据、实测地下水数据等资料对珠江流域的陆地水储量变化进行综合分析。结果表明：1）3大官方机构发布的2006版GRACE时变模型的解算精度较2005版有显著改善，ITSG-Grace2018模型的精度也较ITSG-Grace2016有一定的改善，且新版在不同时变模型间的差异更小；2）ITSG-Grace2018模型反演的珠江流域陆地水储量整体呈上升趋势，其季节性变化特征与GLDAS水文模型、降水数据及地下水测井监测数据具有较好的一致性。
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| 关 键 词： | GRACE 珠江流域 陆地水储量 水文数据 |
Terrestrial Water Storage Changes in Pearl River Region Derived from the Latest Release Temporal Gravity Field Models |
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| CHEN Zhiwei,ZHANG Xingfu,RAN Jiangjun,HU Bo,ZHOU Boyang.Terrestrial Water Storage Changes in Pearl River Region Derived from the Latest Release Temporal Gravity Field Models[J].Journal of Geodesy and Geodynamics,2020,40(3):305-310. |
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| Authors: | CHEN Zhiwei ZHANG Xingfu RAN Jiangjun HU Bo ZHOU Boyang |
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| Institution: | (Faculty of Civil and Transportation Engineering,Guangdong University of Technology,100 West-Waihuan Road,Guangzhou 510006,China;College of Science,Southern University of Science and Technology,1088 Xueyuan Road,Shenzhen 518055,China) |
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| Abstract: | In this paper, we select eight GRACE temporal gravity field models as research objects, including CSR05, GFZ05, JPL05, ITSG-Grace2016, CSR06, GFZ06, JPL06 and ITSG-Grace2018. The terrestrial water storage (TWS) in the Pearl river basin (PRB) from January 2005 to December 2012 is derived from GRACE temporal models processed by the Swenson de-striping filter and 300 km Gaussian smoothing filter algorithm. Finally, the ITSG-Grace2018 model, GLDAS hydrological model, precipitation data and measured groundwater data are selected to comprehensively analyze the variations of TWS in the PRB. The results show that: 1) The accuracy of the release-2006 GRACE temporal gravity field models released by the CSR, JPL and GFZ is significantly improved compared with the release-2005 models. The accuracy of the ITSG-Grace2018 model is also improved compared with the ITSG-Grace2016 model and the difference between the new versions of the temporal gravity field models is smaller. 2) The TWS of the PRB derived from the ITSG-Grace2018 model show an overall upward trend during this period, and seasonal changes are consistent with GLDAS hydrological model, precipitation data and measured groundwater data. |
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| Keywords: | GRACE Pearl river basin(PRB) terrestrial water storage hydrological data |
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