东北印度洋上层海水热含量及影响要素的季节变化

探讨了影响东北印度洋上层海水热含量变化的各要素的季节变化,以及其对热含量变化的贡献和作用过程.根据MOM4数值模拟所得的气候态数据,利用热力学方程积分所得的热通量方程,分析了热含量和各影响要素的季节变化过程.结果表明,东北印度洋海洋动力过程的作用主要存在于海洋上层100 m以内;该区域上层海水热含量的季节变化,是典型的海-气相互作用的结果,由动力过程和海表净热通量共同控制,2种作用都有明显的季节变化特征,并且随区域的变化两者贡献有所变化;西南季风爆发前,上层海洋热含量最大值的出现,是之前几个月动力作用和海表净热通量共同加热的结果.

Seasonal Variation of Heat Content and Its Influence Factors in the Upper Northeastern Indian Ocean

The seasonal variations, contributions, and effects of the factors influencing the heat content variation in the upper northeast Indian Ocean are discussed. Based on the climatic data resulting respectively from the M0M4 model and from the heat flux equation which is derived from the integration of the ther-modynamic equations, the seasonal variation processes of the heat content and its effecting factors are respectively analyzed. As the analysis results show, the role of the oceanic dynamic process is limited within the upper layer of the 100 m depth in the ocean. The seasonal variation of the upper layer heat content is controlled jointly by both the dynamic process and the net heat flux from the sea surface, and it can be mainly attributed to the air-sea interaction. The both with their respective features of the seasonal variations make the common contribution to the regional variations of the heat content. The maximum heat content in the upper layer has appeared before the southwest monsoon bursts, and it is the joint results from the heatings contributed in the months previous to the appearanee of the maximum heat content by both the oceanic dynamic process and the net heat flux at the sea surface.