摘要
潮汐在海洋能量的传递和混合过程中起着重要的作用,为维持全球热盐环流提供了主要的能量,影响着全球的海洋环流。此前已有工作在低分辨率的、单独的海洋模式中研究潮汐作用对海洋环流状态的敏感性,为进一步研究潮汐作用对环流和气候状态的敏感性,有必要将潮强迫引入到气候耦合模式中。本文成功地将8个主要平衡分潮显式地加入到耦合模式FGOALS-g3中,并评估了其对全球海洋潮汐的模拟能力,对于进一步研究潮汐对大尺度环流及气候状态的影响有重要意义。本文通过对模拟的海表面高度数据进行潮汐调和分析,得到各个分潮的调和常数,并将其与全球潮汐模型TPXO9和FES2014,以及开放海洋潮汐数据集st102进行对比。结果表明,FGOALS-g3耦合模式可以合理地模拟全球海洋中的正压潮,模拟结果与潮汐模型和实测数据集相比均比较接近。与这两套全球潮汐模型相比,均方误差均相对较小,且误差大多分布在振幅较大的区域。与st102数据集相比,FGOALS-g3模拟的8个主要分潮的平均振幅相对误差均在10%以内,且总均方误差均小于10 cm。
Tides act an important role in the transfer of ocean energy and mixing,and provide the main energy to maintain the global thermohaline circulation and influence the global ocean circulation.Previous work has explored the sensitivity of ocean circulation states to tidal forcing within an individual ocean model at a low resolution.To further investigate the influence of tidal forcing on ocean circulation and climate states,it is imperative to incorporate the tidal forcing into a coupled climate model.In this paper,the eight major equilibrium constituents are included into the coupled climate model FGOALS-g3 explicitly,and we evaluate its ability to simulate global ocean tides,which lays the basic for the further research on the influence of tidal forcing on large-scale circulation and climate states.We apply tidal harmonic analysis on the sea surface height data to obtain the harmonic constants of each constituent,and compare the model results with the global tidal models TPXO9 and FES2014,and the open ocean tide dataset from st102.The results show that the coupled model FGOALS-g3 can effectively simulate the barotropic tides in the global ocean,with relatively small errors compared to the global tidal models and the observation dataset.Compared with these two global tidal models,the mean square error is relatively small,and the errors are mostly distributed in the region of larger amplitudes.And compared with st102 dataset,the average amplitude relative errors of the eight major equilibrium constituents simulated by FGOALS-g3 are all less than 10%,and the total mean square errors are all less than 10 cm.
作者
黄新禹
王彩霞
魏吉林
于子棚
田志伟
刘海龙
Huang Xinyu;Wang Caixia;Wei Jilin;Yu Zipeng;Tian Zhiwei;Liu Hailong(Key Laboratory of Physical Oceanography,Ministry of Education,Ocean University of China,Qingdao 266100,China;State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics(LASG),Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China;Laoshan Laboratory,Qingdao 266237,China)
出处
《海洋学报》
CAS
CSCD
北大核心
2024年第8期63-73,共11页
基金
国家自然科学基金(41931182)
国家重点研发计划(2022YFC3104802)。
关键词
正压潮
耦合模式
潮汐调和分析
barotropic tide
coupled climate model
harmonic analysis
