南海上层环流和热结构特征的季节性时空演变数值模拟分析

摘要

文章基于POM模式模拟了南海上层环流和热结构季节性变化特征,并且在此基础上初步探讨了南海环流和热结构的主要影响因素.研究结果表明:季风是控制南海上层环流季节性变化的决定性因素,冬、夏季是南海季风盛行期,环流特征也较为典型,而春、秋季节是季风转换期,上层环流出现多涡结构.南海热结构分布最直接影响因素是太阳辐射的季节性变化和地理纬度,并且存在季风和洋流影响所产生的热结构变化.除此之外,南海复杂地形和岸线也会间接影响南海环流形态和热结构分布.%In this paper,the seasonal spatial-temporal evolution of upper-layer circulation and thermal-structure in the South China Sea were simulated based on the POM model.A primary discussion was carried out on the major influencing factors of circulation and thermal-structure in the South China Sea.Monsoon is the decisive factor to control the seasonal variation of upper-layer circulation in the South China Sea.South China Sea monsoon prevails in both winter and summer with typical circulation characteristics.But spring and autumn are the monsoon conversion period when multi-vortex structures appear in the upper-layer circulation.The most direct influencing factors of thermal-structure in the South China Sea include seasonal variation of solar radiation and geographical latitude,and there exist thermal structural variation influenced by monsoon and ocean current.The complex terrain and shorelines in the South China Sea will also indirectly influence the circulation form and thermal-structure distribution in the South China Sea.