论文部分内容阅读
通过利用一个分区性的正压 -斜压衔接模式来探讨夏季南海的上层环流特征及其动力机制 ,结果表明 :夏季期间 ,由于风生环流的不稳定性促使在东沙群岛附近的气旋涡的强度及位置发生变化 ,并间接导致黑潮侵入南海北部的程度变化以及气旋涡南侧的反气旋式环流、西沙群岛西南侧的气旋涡的强度和范围出现波动现象 ;在南海南部的北向西边界流由于离岸的西南季风所驱动在中南半岛中部沿岸脱离岸线往东北方向的流动 ,导致沿岸的水体大量流失而在沿岸形成一支南向补偿流并在西沙群岛西南侧诱生一气旋涡 ,而上述的离岸西边界流则作顺时针方向流动 ,从而在南海南部形成反气旋式大环流 ;在南沙海槽附近出现的局地气旋涡和万安滩附近的气旋涡分别受β效应、底形效应的作用而形成 .
By using a regional positive pressure-baroclinic jointing mode, the characteristics of the upper-level circulation in the South China Sea in summer and its dynamic mechanism are discussed. The results show that during the summer, the strength of the vortex vortex near the Dongsha Islands is promoted due to the instability of the wind-induced circulation And the change of the position, and indirectly led to the extent of Kuroshio intrusion into the northern South China Sea and the anticyclonic circulation on the south side of the vortex vortex. The intensity and range of the cyclonic vortex on the southwestern side of the Xisha Islands fluctuated; Due to the off-shore northeastward movement of the central south China Indosinian monsoon driven by the offshore south-south monsoon, large amounts of water along the coast were drained and a southward compensatory flow was formed along the coast and a vortex of vortex was induced on the southwestern side of the Xisha Islands. However, The above-mentioned off-shore west boundary flow flows in a clockwise direction, thus forming an anticyclonic grand circulation in the southern South China Sea. The local cyclone vortex near the Nansha Trough and the vortex vortex near Wan An Beach are affected by the β effect, Shaped effect of the formation of.