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根据 2 0 0 0年 8— 9月份南海中部与南部航次的温、盐资料 ,采用P 矢量诊断方法 ,结合ADCP测流资料和同期伪风应力资料以及TOPEX/Poseidon高度计资料 ,研究了 2 0 0 0年夏季风持续强迫之后南海大尺度环流与中尺度涡旋的空间结构。结果表明 ,南海夏季温度和盐度水平分布随深度有显著的变化 :中层 (2 5 0— 4 0 0m左右 )温、盐水平分布与其它各层的温度和盐度分布相比有很大的差异。用诊断方法计算得到的环流场与用TOPEX/Poseidon海面高度计资料计算得到的地转流场比较一致 ,即流场内部有多个中尺度的涡旋 ,主要有越南东南外海反气旋涡、中沙群岛东南反气旋涡以及南沙群岛东北角的气旋涡等 ,这说明南海中部与南部盛夏环流具有较强的地转分量和显著的多涡结构 ,并且这些中尺度涡在垂向上存在速度场的切变。
According to the temperature and salinity data of central and southern South China Sea from August to September in 2000, P vector diagnostics method, combined with ADCP data and pseudo-wind stress data and TOPEX / Poseidon altimetry data, Spatial structure of the large-scale circulation and mesoscale vortex in the South China Sea after a 0-year summer monsoon persisting. The results show that the distribution of temperature and salinity in the South China Sea in summer has a significant change with depth: the temperature and salinity levels in the middle layer (about 250-400 m) are significantly different from those in other layers difference. The circulation field calculated by the diagnostic method is consistent with the geostationary flow field calculated by the TOPEX / Poseidon sea surface altimetry data. That is, there are multiple mesoscale vortices inside the flow field, mainly including the vortex in the offshore southeastern Vietnam, The southeastern anti-cyclonic vorticity of the sand islands and the cyclonic vortices at the northeastern corner of the Nansha Islands indicate that the midsummer and the south of the South China Sea have strong geostationary components and significant vortex structures, and the mesoscale eddies have vertical velocities Shear.