Satellite observation of internal solitary waves converting polarity
Satellite observation of internal solitary waves converting polarity
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DOI：
10.1029/2003gl018286
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发表时间：
2003-10
影响因子：
5.2
通讯作者：
Zhong‐Kuo Zhao;V. Klemas;Q. Zheng;Xiao‐Hai Yan
中科院分区：
文献类型：
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作者：
Zhong‐Kuo Zhao;V. Klemas;Q. Zheng;Xiao‐Hai Yan
在一幅位于南海中国大陆架上空的SPOT-3可见光图像上，观测到了两种截然不同的内孤立波特征：较暗的条带导致较亮的条带，较亮的条带导致较暗的条带。作者认为，这种对比模式是由不同极性的ISW造成的。在传播方向和横断面方向上，由于海底浅滩的作用，在转换极性的过程中观察到了一组ISW。通过将信息从空间域传递到时间域，可以获得演化过程。转换过程从原始凹陷ISW通过160米等深线开始。其演化过程可分为两个阶段：第一阶段是原始凹陷波的加宽，第二阶段是新生的高程波的出现。通过数值模拟对这两个阶段进行了验证。
On a SPOT‐3 visible image over the South China Sea continental shelf, two contrasting signatures of internal solitary waves (ISWs) are observed: darker stripes leading brighter stripes in the lower part, and brighter stripes leading darker stripes in the upper part. The authors suggest that the contrasting patterns are caused by ISWs of different polarities. A packet of ISWs is observed in the process of converting polarity due to bottom shoaling, both in the propagation direction and in the transect direction. The evolution process can be obtained by transferring information from the spatial domain to the temporal domain. The conversion process starts with the original depression ISWs passing the 160 m isobath. The evolution process can be divided into two phases: the first is the broadening of the original depression waves and the second is the appearance of the new‐born elevation waves. These two phases are verified using numerical simulation.