北部湾物理海洋模型的建立与验证

The Construction and the Verification of Beibu Gulf Physical Oceanic Model

关键词:  海洋  环流  模型  建立  验证

Key words:  ocean  circulation  model  construction  verification

摘要:

采用坐标变换方法,在北部湾上层海洋采用正交坐标系以获得垂向高分辨率,在底层水体采用Sigma坐标系以拟合地形,建立北部湾的物理海洋模型,并利用建立的模型分别模拟北部湾的M₂、K₁、O₁分潮.结果计算值与实测值相比,M₂、K₁、O₁分潮振幅的绝对平均误差分别为3.4cm、4.7cm、5.1cm,相位绝对平均误差分别为7.1°、9.3°、7.2°,在潮波模拟可以接受的误差范围内,模拟的潮波系统与实测的潮波系统符合良好.说明建立的模型对潮波模拟具有较高精度,模型是可靠的、稳定的,可用于有关工程计算以及环流的模拟计算.

Abstract:

By coordinate transformation,specifically,by using orthogonal coordinate system to obtain vertical high resolution ratio in superstratum water of Beibu Gulf and making use of Sigma coordinate system to match terrain in bottom water,the authors intend to set up Beibu Gulf Physical Oceanic Model and use the model to simulate partial tide M₂,partial tide K₁ and partial tide O₁ respectively.Comparing by actually measured result,the absolute average errors of tidal frequency of partial tide M₂,partial tide K₁ and partial tide O₁ are 3.4 cm,4.7 cm and 5.1 cm respectively while phase absolute average errors are 7.1°,9.3ånd 7.2°respectively.Our analog tide wave system is in good agreement with actually measured tide wave system.It shows that our model has high precision in tide wave analog.Besides,this model is credible and steady,and can be used in engineering calculation and the analog computation of circulation.