王琪洁,
中南大学地球科学与信息物理学院, 长沙 410083
基金项目: 国家自然科学基金(U1531128), 中南大学中央高校基本科研业务费专项资金(11300-502211720)资助
详细信息
作者简介: 杨涛, 硕士研究生, 主要研究方向为非潮汐海洋负荷.E-mail:ytsurvey@csu.edu.cn
通讯作者: 王琪洁, 教授, 博士生导师, 主要从事InSAR形变监测及潮汐改正等方面研究工作.E-mail:qjwang@csu.edu.cn
中图分类号: P312;P732收稿日期:2018-02-28
修回日期:2019-02-28
上线日期:2020-01-05
The non-tidal loading induced by tropical cyclones MATTHEW
YANG Tao,WANG QiJie,
School of Geosciences and Info-Physics, Central South University, Changsha 410083, China
More Information
Corresponding author: WANG QiJie,E-mail:qjwang@csu.edu.cn
MSC: P312;P732--> Received Date: 28 February 2018
Revised Date: 28 February 2019
Available Online: 05 January 2020
摘要
摘要:热带气旋能在短期内造成海水和大气质量的重新分布，使得近海地表受力发生变化，进而产生非潮汐负荷形变，对现今高精度大地测量的影响已不容忽视.为了保证空间大地测量结果的精度和稳定性，热带气旋引起的地表形变必须进行有效的估计.因此本文联合NOS、GLOSS验潮站数据与海潮模型，通过获取非潮汐残余量分析了热带气旋"MATTHEW"引起的风暴潮.利用ECCO海洋环流模型、ERAin大气再分析模型、HUGO-m海洋动力学模型，分别估计了"MATTHEW"引起非潮汐海洋负荷、非潮汐大气负荷、动力学响应下非潮汐海洋负荷对地表位移的影响，结果表明热带气旋影响下的广大区域地表都不同程度受到非潮汐负荷的作用，最大位移分别达到-9.13 mm、3.31 mm、-6.11 mm，并且加入动力学响应的非潮汐海洋负荷要普遍大于IB（Inverted Barometer）响应下的结果.在对比不同位置站点所受负荷差异时，发现"大陆站"非潮汐海洋负荷形变普遍大于"岛屿站"，而"岛屿站"更易受非潮汐大气负荷的影响.
关键词: 热带气旋/
风暴潮/
非潮汐负荷/
地表形变
Abstract:Tropical cyclones can cause sea water and atmospheric mass redistribution in a short term, which induces surface deformation from non-tidal ocean loading because of the surface force change. We combine tide gauge data from NOS and GLOSS stations with ocean tide model, and analyze storm surge arising from tropical cyclones MATTHEW by calculating the non-tidal residuals. Based on Circulation and Climate of the Oceans model, ERAin atmospheric reanalysis model and Toulouse Unstructured Grid Ocean model, we estimate the surface deformation from non-tidal ocean loading (NTOL), non-tidal atmospheric pressure loading (NTAL) and dynamic non-tidal ocean loading (D-NTOL). Results show that offshore areas are affected by MATTHEW to a greater or lesser degree. The predicted maximum displacements are -9.13 mm, 3.31 mm and -6.11 mm caused by NTOL, NTAL and D-NTOL respectively. Taking into account the dynamic response, results in the non-tidal ocean loading displacements are larger than those in inverted barometer hypothesis. When comparing loading displacements differences, we can draw the conclusion that non-tidal ocean loading displacements of continent sites are universally larger than those in islands sites, while non-tidal atmospheric pressure loading has an opposite result:loading displacements of continent sites are generally smaller than those in island sites.
Key words:Tropical cyclones/
Storm surge/
Non-tidal loading/
Surface deformation
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