Extraction of ocean tides in the Bohai Sea from GFO satellite altimeter via a modified tidal harmonic analysis algorithm

IF 2.1 3区 地球科学 Q2 OCEANOGRAPHY Continental Shelf Research Pub Date : 2024-04-13 DOI:10.1016/j.csr.2024.105231
Haidong Pan , Junchuan Sun , Tengfei Xu , Zexun Wei
{"title":"Extraction of ocean tides in the Bohai Sea from GFO satellite altimeter via a modified tidal harmonic analysis algorithm","authors":"Haidong Pan ,&nbsp;Junchuan Sun ,&nbsp;Tengfei Xu ,&nbsp;Zexun Wei","doi":"10.1016/j.csr.2024.105231","DOIUrl":null,"url":null,"abstract":"<div><p>Exact tidal information is essential for multifarious human activities in the global ocean. Satellite altimeters especially Topex/Poseidon (T/P) and Jason series play fundamental roles in improving our understanding of global tides. Compared to T/P-Jason series, other satellite altimeters such as Geosat Follow-On (GFO) have been rarely used in tidal studies mainly due to their unfavorable aliasing features for tidal estimates. Classical harmonic analysis requires 12-year GFO records to fully resolve eight major tidal constituents while the longest GFO data is only 8-year. As a result, it is challenging for classical harmonic analysis to derive reliable tidal estimates from short GFO records. In this study, a modified tidal harmonic analysis algorithm based on the credo of smoothness (i.e. MHACS) is introduced to extract ocean tides from GFO records in the Bohai Sea. Via utilizing the inherent natural links between main constituents, MHACS breaks the constraint of the Rayleigh criterion and effectively solves tidal aliasing problems in GFO records. Practical experiments indicate that GFO-derived tidal constants via MHACS have high consistencies with the tidal theory and satellite-based EOT20 tidal model. Spatially-averaged vector difference between the EOT20 model and GFO results in the Bohai Sea is only 2.12 cm (eight major constituents averaged). Moreover, except for GFO, MHACS also has the potential to be applied to sun-synchronous satellites such as Envisat, Sentinel series, and Haiyang series.</p></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"276 ","pages":"Article 105231"},"PeriodicalIF":2.1000,"publicationDate":"2024-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Continental Shelf Research","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S027843432400061X","RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"OCEANOGRAPHY","Score":null,"Total":0}
引用次数: 0

Abstract

Exact tidal information is essential for multifarious human activities in the global ocean. Satellite altimeters especially Topex/Poseidon (T/P) and Jason series play fundamental roles in improving our understanding of global tides. Compared to T/P-Jason series, other satellite altimeters such as Geosat Follow-On (GFO) have been rarely used in tidal studies mainly due to their unfavorable aliasing features for tidal estimates. Classical harmonic analysis requires 12-year GFO records to fully resolve eight major tidal constituents while the longest GFO data is only 8-year. As a result, it is challenging for classical harmonic analysis to derive reliable tidal estimates from short GFO records. In this study, a modified tidal harmonic analysis algorithm based on the credo of smoothness (i.e. MHACS) is introduced to extract ocean tides from GFO records in the Bohai Sea. Via utilizing the inherent natural links between main constituents, MHACS breaks the constraint of the Rayleigh criterion and effectively solves tidal aliasing problems in GFO records. Practical experiments indicate that GFO-derived tidal constants via MHACS have high consistencies with the tidal theory and satellite-based EOT20 tidal model. Spatially-averaged vector difference between the EOT20 model and GFO results in the Bohai Sea is only 2.12 cm (eight major constituents averaged). Moreover, except for GFO, MHACS also has the potential to be applied to sun-synchronous satellites such as Envisat, Sentinel series, and Haiyang series.

查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
通过改进的潮汐谐波分析算法从 GFO 卫星高度计提取渤海海洋潮汐信息
准确的潮汐信息对人类在全球海洋中的各种活动至关重要。卫星高度计,特别是 Topex/Poseidon(T/P)和 Jason 系列,在提高我们对全球潮汐的认识方面发挥着重要作用。与 T/P-Jason 系列相比,Geosat Follow-On (GFO) 等其他卫星高度计很少用于潮汐研究,主要原因是它们的混叠特征不利于潮汐估算。经典的谐波分析需要 12 年的 GFO 记录才能完全解析八个主要潮汐成分,而最长的 GFO 数据只有 8 年。因此,要从较短的 GFO 记录中得出可靠的潮汐估算值,对经典谐波分析是一个挑战。本研究引入了一种基于平滑信条的修正潮汐谐波分析算法(即 MHACS),从渤海的 GFO 记录中提取海洋潮汐。通过利用主要成分之间固有的自然联系,MHACS 打破了瑞利准则的限制,有效地解决了 GFO 记录中的潮汐混叠问题。实际实验表明,通过 MHACS 得出的 GFO 潮汐常数与潮汐理论和基于卫星的 EOT20 潮汐模型具有很高的一致性。在渤海,EOT20 模型与 GFO 结果的空间平均矢量差仅为 2.12 厘米(8 个主要成分的平均值)。此外,除 GFO 外,MHACS 还有可能应用于环境卫星、哨兵系列和海洋系列等太阳同步卫星。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 去求助
来源期刊
Continental Shelf Research
Continental Shelf Research 地学-海洋学
CiteScore
4.30
自引率
4.30%
发文量
136
审稿时长
6.1 months
期刊介绍: Continental Shelf Research publishes articles dealing with the biological, chemical, geological and physical oceanography of the shallow marine environment, from coastal and estuarine waters out to the shelf break. The continental shelf is a critical environment within the land-ocean continuum, and many processes, functions and problems in the continental shelf are driven by terrestrial inputs transported through the rivers and estuaries to the coastal and continental shelf areas. Manuscripts that deal with these topics must make a clear link to the continental shelf. Examples of research areas include: Physical sedimentology and geomorphology Geochemistry of the coastal ocean (inorganic and organic) Marine environment and anthropogenic effects Interaction of physical dynamics with natural and manmade shoreline features Benthic, phytoplankton and zooplankton ecology Coastal water and sediment quality, and ecosystem health Benthic-pelagic coupling (physical and biogeochemical) Interactions between physical dynamics (waves, currents, mixing, etc.) and biogeochemical cycles Estuarine, coastal and shelf sea modelling and process studies.
期刊最新文献
Environmental control of Arctic marine zooplankton near a large archipelago during the summer season Editorial Board Multiscale sea level variability on the western Bay of Bengal: A study using tide gauge and satellite observations Satellite-based evidence of upwelling separation off NW Iberia Assessing the conservation status of Mediterranean coastal ponds: Checklist, ecological and functional diversity of diatom communities
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1