西北太平洋的一种潮汐数值同化模型

朱学明; 鲍献文; 黄必桂; 石新刚; 靖春生

西北太平洋的一种潮汐数值同化模型

1.
国家海洋环境预报中心国家海洋局海洋灾害预报技术研究重点实验室, 北京 100081
2.
中国海洋大学海洋环境学院, 山东青岛 266100
3.
中海石油研究中心, 北京 100027
4.
中海油能源发展股份有限公司北京分公司, 北京 100027
5.
国家海洋局第三海洋研究所, 福建厦门 361005

基金项目: 国家自然科学基金(40976001);国家重点基础研究计划("973"计划)项目(2011CB403600);海洋公益性项目(200805087);国家863计划(2007AA092104)。

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出版历程
- 收稿日期: 2010-04-21
- 修回日期: 2010-08-13

An tidal numerical assimilation modeling in northwest Pacific

1.
Key Laboratory of Research on Marine Hazards Forecasting, National Marine Environmental Forecasting Center, Beijing 100081, China
2.
College of Physical and Environmental Oceanography, Ocean University of China, Qingdao 266100, China
3.
CNOOC Research Center, Beijing 100027, China
4.
Beijing Branch of CNOOC Energy Technology & Services Limited, Beijing 100027, China
5.
Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China

摘要

摘要: 利用FVCOM海洋数值模式,在球坐标系统下考虑非线性效应和天体引潮力的影响,基于非结构的三角形网格建立了包括中国近海、日本海、鄂霍次科海和部分西北太平洋海域的高分辨率海洋潮汐数值模型,并采用趋近法同化84个沿岸验潮站的观测资料。模拟结果与175个验潮站的实测结果拟合良好,M₂,S₂,K₁,O₁四个主要分潮振幅和迟角的绝对平均误差分别为4.0 cm和5.6°,2.4 cm和7.5°,2.6 cm和6.3°,1.5 cm和5.0°。依据调和分析结果给出了4个主要分潮的同潮图分布,得到8个半日分潮和5个全日分潮的无潮点,证实了宗谷海峡全日潮无潮点的存在,首次模拟得到津轻海峡的全日潮无潮点;还给出了整个计算海域内最大可能潮差和潮汐余水位的分布特征。
- 西北太平洋 /
- 日本海 /
- 潮汐 /
- 趋近法 /
- FVCOM
Abstract: Based on the Finite Volume Coastal and Ocean Model (FVCOM), an unstructured ocean tidal numerical model with high resolution was built in northwest Pacific, including the marginal seas adjacent to China, Japan/East Sea and Okhotsk Sea. The model was in a spherical coordinate and took into account the effects of non-linear and tide-generating force. The tidal datasets from 84 tide-gauges along the coast were assimilated into the model with Nudging method. Comparing with the other 175 tidal stations which were not assimilated in this model, the simulated results were well agree with the observations, with the absolute mean errors of amplitude and phase-lag 4.0 cm and 5.6° for M₂ constituent, 2.4 cm and 7.5° for S₂ constituent, 2.6 cm and 6.3° for K₁ constituent, 1.5 cm and 5.0° for O₁ constituent, respectively. According to the co-tidal charts for the four major constituents by harmonic analysis, 8 amphidromic points for the semi-diurnal tides and 5 amphidromic points for the diurnal tides were found. The existence of amphidromic point for the diurnal tides in Soya strait was confirmed by the model results and we documented first an amphidromic point for the diurnal tides in Tsugaru strait. The distribution for the maximum possible tidal ranges and the tide residual water level were obtained in the whole model domain.
- northwest Pacific /
- Japan/East Sea /
- tide /
- nudging /
- FVCOM

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