Inversion of ocean tidal loadings of marine constituents based on the GPS measurements in the offshore islands

doi:10.6038/cjg20170106

CORC > 自然资源部第一海洋研究所 > 自然资源部第一海洋研究所 > 业务部门 > 海岛海岸带研究中心

	Inversion of ocean tidal loadings of marine constituents based on the GPS measurements in the offshore islands
	Wu Zhi-Lu 1,2; Liu Yan-Xiong 1,2; He Xiu-Feng 1; Peng Lin 2; Zheng Jian 2
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2017-01
卷号	60 期号:1 页码:61-69
关键词	PPP FFT OTL Times series Offshore islands
ISSN号	0001-5733
DOI	10.6038/cjg20170106
英文摘要	The inversion method is studied and applied to acquire eigenvalues of the Ocean Tidal Loading (OTL) in this paper. Two offshore GPS sites EPTN and SZPO of China are adopted for the inversion based on FFT method, of which the results are compared with the global ocean tide models FES2004/NAO.99b/GOT4.7. The accuracy of the inverted frequency of the OTL is also evaluated for a better correction of the OTL effect on DSSA, which is close to EPTN. Results are as follows: (1) The frequency extracted from FFT is nearly identical with the known value for the marine constituents, with maximum deviation of 1.4%; and less than 1% frequency error is identified in the other 7 sub tides. (2) The two islands belong to different intrusion channels of ocean tides, their behavior of same tidal system but different tidal ranges is indirectly demonstrated by the differences in the inverted amplitudes and initial phases while the consistency in frequency. (3) The inverted amplitudes are in good agreement with the global model. Differences of the S2/O1/P1/Q1 constituents are 1 similar to 2 mm and <3 mm in the horizontal and vertical directions, respectively; while <2 mm and 5 similar to 6 mm differences are found for K2/K1/M2/N2 in horizontal and vertical directions, respectively. (4) Compared with global models, the improvement achieved by the OTL correction on nearby GPS stations indirectly illustrated the reliability and effectiveness of the proposed method. (5) The dynamic PPP results can be used to separate the OTL effects, although they contain many kinds of errors.
WOS研究方向	Geochemistry & Geophysics
语种	中文
出版者	SCIENCE PRESS
WOS记录号	WOS:000392040800006
内容类型	期刊论文
源URL	[http://ir.fio.com.cn/handle/2SI8HI0U/3261]
专题	业务部门_海岛海岸带研究中心
作者单位	1.Hohai Univ, Sch Earth Sci & Engn, Nanjing 210098, Jiangsu, Peoples R China; 2.SOA, Inst Oceanog 1, Qingdao 266061, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Wu Zhi-Lu,Liu Yan-Xiong,He Xiu-Feng,et al. Inversion of ocean tidal loadings of marine constituents based on the GPS measurements in the offshore islands[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2017,60(1):61-69.
APA	Wu Zhi-Lu,Liu Yan-Xiong,He Xiu-Feng,Peng Lin,&Zheng Jian.(2017).Inversion of ocean tidal loadings of marine constituents based on the GPS measurements in the offshore islands.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,60(1),61-69.
MLA	Wu Zhi-Lu,et al."Inversion of ocean tidal loadings of marine constituents based on the GPS measurements in the offshore islands".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 60.1(2017):61-69.