Gap-filling GRACE and GRACE-FO data with a climate adjustment scheme using Singular Spectrum analysis
文献类型：期刊论文
| 作者 | Zhang, Xuanze3; Ren, Chanyue2,3; Wang, Zhonglei1; Li, Xiaojie3; Zhang, Yongqiang3 |
| 刊名 | JOURNAL OF HYDROLOGY
 |
| 出版日期 | 2025-06-01 |
| 卷号 | 653页码:132782 |
| 关键词 | GRACE GRACE-FO Gap filling Terrestrial water storage anomaly SPEI SSA |
| ISSN号 | 0022-1694 |
| DOI | 10.1016/j.jhydrol.2025.132782 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | The satellite missions of Gravity Recovery and Climate Experiment (GRACE) and its follow-on (GRACE-FO) have provided two decades' observations for global hydrological cycle and climate change communities. However, there exists 33-month data gaps, especially the 11-month gap during 2017-2018 within the missions, introducing significant biases and uncertainties in monitoring long-term trends and identifying extreme events from GRACE- based terrestrial water storage anomaly (TWSA). Although previous efforts to fill these gaps, a global gap-filled product that fulfills increasing desirable accuracy is still lacking. Here, we propose a novel approach to fill in the global TWSA data gap with climate adjustment scheme using Singular Spectrum Analysis (climSSA) together with the climate drought index (SPEI-6) as input. The climSSA has significantly increased the representation of sub-seasonal and inter-annual signals in TWSA relative to traditional SSA. Cross-validation analysis for a 24- month testing period suggests that the Nash-Sutcliffe Efficiency values between climSSA and GRACE-FO are significantly positive (>= 0.3) in > 90 % global land and larger than 0.8 in > 50 % global land. Its performance remains steady after removing the contribution from seasonal cycles, and is similar to or better than three recent products and geodetic satellite laser ranging (SLR) satellites-derived data. Our approach suggests the merit of using climate drought index in reconstructing a long-term GRACE-like TWSA over the GRACE-gap and pre- GRACE periods. |
| URL标识 | 查看原文 |
| WOS关键词 | EARTHS GRAVITY-FIELD ; WATER ; VARIABILITY ; DROUGHT |
| WOS研究方向 | Engineering ; Geology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:001424836400001 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/212398]  |
| 专题 | 陆地水循环及地表过程院重点实验室_外文论文 |
| 通讯作者 | Zhang, Xuanze; Zhang, Yongqiang |
| 作者单位 | 1.Xiamen Univ, Wang Yanan Inst Studies Econ WISE, Sch Econ, Xiamen 361005, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China; 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Zhang, Xuanze,Ren, Chanyue,Wang, Zhonglei,et al. Gap-filling GRACE and GRACE-FO data with a climate adjustment scheme using Singular Spectrum analysis[J]. JOURNAL OF HYDROLOGY,2025,653:132782. |
| APA | Zhang, Xuanze,Ren, Chanyue,Wang, Zhonglei,Li, Xiaojie,&Zhang, Yongqiang.(2025).Gap-filling GRACE and GRACE-FO data with a climate adjustment scheme using Singular Spectrum analysis.JOURNAL OF HYDROLOGY,653,132782. |
| MLA | Zhang, Xuanze,et al."Gap-filling GRACE and GRACE-FO data with a climate adjustment scheme using Singular Spectrum analysis".JOURNAL OF HYDROLOGY 653(2025):132782. |
入库方式： OAI收割
来源：地理科学与资源研究所
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