南海sCHIsM 模式不同垂向坐标研究

基于 sCHIsM 模式建立南海三维流场模式，进行了设置 g 坐标 、sZ 坐标与局地 g 坐标的数值模拟研究。结果表明， 在不加同化条件下， 垂向坐标对南海斜压环流和海温模拟有比较明显的影响， 在越南外海尤为显著， g 坐标和局地 g 坐标能 够较好地模拟出越南外海的涡旋， sZ 坐标对涡旋的模拟效果比较差， 局地 g 坐标对海温的模拟效果最好， 而 g 坐标对海温 的模拟结果最差。总体而言， 局地 g 坐标可以兼顾南海斜压环流和海温模拟的要求。

ContraStsie Study on different iertical coordinate SettingS of sCHIsM model in the Nanhai sea

Based on sCHIsM model. a three-dimensional current model of the Nanhai sea was established. and the nu- merical simulations of g coordinate. sZ coordinate and local g coordinate were carried out. without assimilation. the results show that the vertical coordinates have significant influence on the simulations of baroclinic circulation and sea surface tem- perature in the Nanhai sea. especially in Vietnam coast. The g coordinate and the local g coordinate can simulate the eddies in the offshore Vietnam well. while the sZ coordinate is not good at simulating the eddies. The local g coordinate has the best effect on the sea surface temperature simulation. but simulation of the g coordinate is the worst. In general. the local g coor- dinates can meet the requirements of baroclinic circulation and sea surface temperature simulation in the Nanhai sea.