华南沿海海域历元统一的潮汐模型构建  

Construction of a tidal model with unified datum epoch in the coastal waters of South China

作　　者：董斌斌 梁亚朋 施紫鹏 星睿 欧阳莉婷 DONG Binbin;LIANG Yapeng;SHI Zipeng;XING Rui;OU YANG Liting(Guangdong Provincial Institute of Land and Resources Surveying and Mapping,Guangzhou 510599,China;Key Laboratory of Natural Resources Monitoring in Tropical and Subtropical area of South China,MNR,Guangzhou 510670,China)

机构地区：[1]广东省国土资源测绘院,广东广州510599 [2]自然资源部华南热带亚热带自然资源监测重点实验室,广东广州510670

出　　处：《海洋测绘》2024年第5期24-27,36,共5页Hydrographic Surveying and Charting

基　　金：广东省科技计划项目(2021B1212100003);广东省海洋经济发展(海洋六大产业)专项资金项目(粤自然资合[2022]21号)。

摘　　要：为提高海洋潮汐模型的精度与稳定性,采用差分的方法将华南沿海海域验潮站和卫星测高的调和常数统一历元至19年(2003-2021年),并利用二维浅水数值模拟法与blending同化法构建了8个天文分潮的精密潮汐模型(Q_(1)、O_(1)、P_(1)、K_(1)、S_(2)、N_(2)、M_(2)、K_(2));采用函数拟合的方法构建了2个长周期分潮(Sa、Ssa)以及3个浅水分潮(M4、M6、MS4)的精密潮汐模型。最终完成了1′×1′分辨率的华南沿海海域历元统一的潮汐模型构建,13个分潮的综合精度优于4.87 cm,与目前主流全球潮汐模型精度相比有较大提升。In order to improve the accuracy and stability of the ocean tidal model,the harmonic constants of tide stations and satellite altimetry in the coastal waters of South China are unified to 19 years(2003-2021)via differential method.Precise models for 8 astronomical constituents(Q _(1),O _(1),P _(1),K _(1),S _(2),N _(2),M _(2),K _(2))were constructed by using the two-dimensional shallow water numerical simulation method and“blending”assimilation method.The precise tidal models of two long-period constituents(Sa,Ssa)and three shallow-water constituents(M 4,M 6,MS 4)were constructed via function fitting.Finally,a datum-epoch-unified tidal model with 1′×1′resolution was constructed for the coastal waters of South China.The comprehensive accuracy of the 13 constituents is better than 4.87cm,which is much higher than that of the current mainstream global tidal models.

关 键 词：潮汐模型 历元统一 调和常数 blending同化法 函数拟合法 

分 类 号：P229.7[天文地球—大地测量学与测量工程]