The resolution of the model emerges to be an important factor in simulating the real oceanic features. In this paper, the performance of two coupled bio-physical models, having spatial resolutions 1/12° (∼9 km) and 1/4° (∼25 km) configured using Regional Ocean Modeling System (ROMS), have been evaluated in simulating upper ocean dynamics of the Arabian Sea. A comparison of the model simulated physical and biogeochemical fields with the observations from remote sensing, in-situ ship-borne, and Biogeochemical-Argo (BGC-Argo) floats showed that the high-resolution model reproduced the ocean physical and biogeochemical dynamics, and their seasonality more efficiently. The upper ocean dynamics associated with the variability of mixed layer depth, persistent occurrence of deep chlorophyll maxima, and seasonal phytoplankton blooms. as well as deep ocean characteristics of oxygen minimum zone were much effectively captured by the high-resolution model than by its counterpart. Similarly, the former model performed very well in reproducing the upwelling dynamics over the eastern continental shelf indicating that the open ocean-coastal coupling has been better established. Our analysis indicates that the realistic representation of the eddy fields by the high-resolution model leads to the better representation of the ocean fields in comparison to the coarse-resolution model.

该模型的分辨率成为模拟真实海洋特征的重要因素。在本文中，已对使用区域海洋建模系统（ROMS）配置的空间分辨率为1/12°（〜9 km）和1/4°（〜25 km）的两个耦合生物物理模型的性能进行了评估。模拟阿拉伯海的上层海洋动力学。将模型模拟的物理和生物地球化学场与原位遥感观测结果进行比较船载和生物地球化学-Argo（BGC-Argo）浮标显示，高分辨率模型再现了海洋的物理和生物地球化学动态，并更有效地再现了其季节性。上层海洋动力学与混合层深度的变化，深层叶绿素最大值的持续发生以及季节性浮游植物的开花有关。高分辨率模型比对应模型更有效地捕获了氧气最小区域的深海特征。同样，前一种模型在再现东部大陆架上的上升动力方面表现非常出色，表明开放的海陆耦合已得到更好的建立。