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采用高分辨率三维海洋环流模式对南海北部陆架／陆坡区环流场进行动力诊断分析,探讨南海暖流所在海区环流场的动量收支和南海暖流逆风流动的动量来源．研究表明,穿越陆架的压力梯度和跨陆架输运的地转适应是产生东北向逆风流的主要原因;沿陆架方向的压力梯度与海面应力、海底应力和科氏力相平衡,且量级比穿越陆架方向上动量方程各项的量级小．该海区动量收支方式的分析对今后南海北部海洋环境预报具有重要参考价值．
The dynamic diagnosis and analysis of the circulation field in the northern shelf and slope of the South China Sea is carried out by using the high resolution 3D ocean circulation model to investigate the momentum and the source of the momentum flow of the circulation field in the sea area where the South China Sea warm current locates and the southward warm current. The results show that the pressure gradient across the shelf and the geostrophic transition of the shelf are the main causes of the northeastward upwind flow. The pressure gradient along the shelf balances with the sea surface stress, seafloor stress and Coriolis force, and the magnitude ratio The magnitude of the momentum equation across the shelf is small. The analysis of Momentum Revenue and Expenditure in the sea area is of important reference value for the future forecast of marine environment in the northern South China Sea.