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初步分析了8个准全球高分辨率海洋模式模拟的南海深层和底层环流,总结了模式中南海深层与底层环流的基本特征.温盐误差分析显示深层温度相对偏差一致偏负,而盐度偏差大部分模式基都是为正偏差,表明深层偏冷偏咸.温度的偏差幅度要大于盐度,且温盐在深层存在趋势.吕宋海峡深层1500m以深水交换各模式平均为0.36Sv,与观测相比偏弱.同化过的模式和一个未同化的模式(OCCAM)都显示,吕宋深层水交换在春季达到最小,而在冬季达到最大.大多数模式2400m以深垂直积分流函数显示南海深层在大尺度上为气旋式环流,但流函数的分布与由气候态温盐数据集(GDEMv3)诊断出来的流函数相比存在较大的差异.南海1000m以浅经向翻转结构比较类似,但1500m以深的经向翻转结构空间分布和强度大小存在较大的差异.而2400m以深的经向翻转与气候态温盐数据集(GDEMv3)诊断出来的经向翻转相比偏弱,这表明着模式中深层水垂直混合过程偏弱.在上述分析基础上,详细探讨了初始温盐场、地形、垂向混合方案对南海深海环流的影响,对今后专门构建适合南海深海环流研究的模式提供了必要的参考.
The primary and secondary circulation of the South China Sea simulated by eight quasi-global high resolution ocean models are analyzed preliminarily, and the basic characteristics of deep and bottom circulation in the model Zhongnanhai are summarized. The analysis of temperature and salt error shows that the relative deviation of deep temperature is consistently negative and the salinity deviation is large Partial model base is positive deviation, indicating that the deep cold and salty.The temperature deviation range is greater than the salinity, and temperature and salt in the deep there is a trend.Lu Song Strait deep 1500m deep water exchange for each mode an average of 0.36Sv, and observation Compared with the weaker.The assimilation mode and an unassimilated mode (OCCAM) both show that the deep water exchange in Luzon reaches the minimum in spring and reaches the maximum in winter.Most modes 2400m show the deep vertical integration flow However, the distribution of stream function is quite different from the stream function diagnosed by GDEMv3 data. The south China sea at 1000m is similar to the shallow meridional inversion structure, but the depth of 1500m There is a big difference in spatial distribution and intensity of meridional overturning structure.While the depth of 2400m is changed by the meridional overturning and the meridional direction of GDEMv3 Which indicates that the vertical mixing process of the deep water in the model is weak.On the basis of the above analysis, the effects of initial temperature and salinity field, topography and vertical mixing scheme on the SCS circulation in South China Sea are discussed in detail, The South China Sea deep circulation research model provides the necessary reference.