Boundary-Included Enhanced Water Storage Changes Inferred by GPS in the Pacific Rim of the Western United States

Boundary-Included Enhanced Water Storage Changes Inferred by GPS in the Pacific Rim of the Western United States
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GPS 推断美国西部环太平洋地区边界内水储量增强变化

DOI:
10.3390/rs12152429
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发表时间:
2020-07
期刊:
影响因子:
5
通讯作者:
Bai Xixuan
Bai Xixuan
中科院分区:
工程技术2区
文献类型:
--
作者:
Shen Yingchun;Yan Haoming;Peng Peng;Feng Wei;Zhang Zizhan;Song Yunji;Bai Xixuan

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为了提高区域GPS垂直形变数据的地表蓄水量(TWS),我们开发了一种新的包含边界的反演模型。通过定义一个新的圆盘载荷经验函数(DLEF),并考虑了近区和外区的质量变化效应,结果表明TWS比直接倒置的TWS更合理。六次模拟试验进一步证实了边界包含模型的有效性。最后,基于GPS观测的垂直形变信息,利用新的边界包含模型,推导出了美国西部环太平洋地区的TWS。反演结果表明,包含边界的反演模型在边界区域的方差减小方面可以有效地将反演结果提高10%-20%。
We developed a new boundary-included inversion model to improve the terrestrial water storage (TWS) inverted from regional GPS vertical deformation data. Through defining a new disc load empirical function (DLEF) and considering the mass change effect from the near but outside region, the result shows the TWS is more reasonable than the one inverted directly. Six simulation tests further confirmed the effectiveness of the boundary-included model. Finally, our new boundary-included model was used to derive the TWS in the Pacific Rim of the western United States based on the GPS-observed vertical deformation information. The inversion results show that our boundary-included inversion model can effectively improve the inversion results by 10–20% in terms of variance reduction in the boundary regions.
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