Causes of Coastal Sea Level Change

被引：0

作者：

Xu T. ^{[1
]}

Yang Y. ^{[2
]}

Mu D. ^{[1
]}

Yin P. ^{[1
]}

机构：

[1] Institute of Space Sciences, Shandong University, Weihai

[2] School of City and Regional Planning, Yancheng Teachers University, Yancheng

来源：

Wuhan Daxue Xuebao (Xinxi Kexue Ban)/Geomatics and Information Science of Wuhan University | 2022年 / 47卷 / 10期

基金：

中国国家自然科学基金;

关键词：

coastal zone; satellite altimetry; sea level change; time-variable gravity;

D O I：

10.13203/j.whugis20210643

中图分类号：

学科分类号：

摘要：

Objectives: Coastal sea level rise poses direct threats to human livelihood. It is of scientific importance to understand the causes and provide useful strategies for adapting sea level rise. This paper aims to investigate the causes of coastal sea level change using satellite altimetry, satellite time-variable gravity, and Argo floats.Methods: Given that time-variable gravity suffers from serious leakage issue over coastal area, we use land mass variations from a mascon solution to simulate the leakage from land into oceans, which is estimated to be 0.68 mm/a.Results: On seasonal and non-seasonal scales, satellite altimetry measurements are well explained by the summation of time-variable gravity and Argo floats, demonstrating the closure of coastal sea level change.Satellite altimetry suggests a rate of 3.32±0.45 mm/a for coastal sea level rise, but the summation of time-variable gravity and Argo floats yields a rate of 2.25±0.51 mm/a. Conclusions: The rate discrepancy is about 1 mm/a in coastal sea level budget, which suggestes that closing the sea level budget for coastal zone is challenged by uncertainties. The in situ measurements are sparse for Argo over coastal zone, which may underestimate the steric trend. Furthermore, leakage correction and vertical land motion may also cause uncertainties. © 2022 Wuhan University. All rights reserved.

引用

页码：1750 / 1757

页数：7

共 34 条

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