Inferring internal wave phase speed from multi-satellite observations
Inferring internal wave phase speed from multi-satellite observations
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DOI：
10.1109/igarss.2014.6947560
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发表时间：
2014-07
期刊：
影响因子：
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通讯作者：
Hong Yang;Bingqing Liu;Zhong‐Kuo Zhao;Xiaofeng Li
中科院分区：
文献类型：
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作者：
Hong Yang;Bingqing Liu;Zhong‐Kuo Zhao;Xiaofeng Li
利用间隔约0.5-2.5小时的多卫星图像对研究了南海东沙环礁周围的内孤立波（ISW）速度的时空变化。分别分析了2007年7月、2009年3月和2013年5月的SAR图像对、VIIRS/MODIS和SAR/MODIS对。 ISW 相速度是利用 ISW 图案的水平位移和 2 个卫星图像之间的时间差得出的。相速度与使用带有非线性项的 Taylor-Goldstein (T-G) 方程的理论计算结果非常吻合。 ISW相速度自东向西、自南向北递减。 ISW 相速度的时间变化主要受水深影响，季节性变化较小。
The spatial and temporal variability of internal solitary waves (ISWs) speed around Dongsha Atoll in the South China Sea (SCS) was investigated using multi-satellite image pairs separated by about 0.5-2.5 hours. SAR image pair, VIIRS/MODIS and SAR/MODIS pairs in July 2007, March 2009, and May 2013 were analyzed, respectively. The ISW phase speeds were derived using the horizontal displacement of the ISW patterns and the time difference between the 2 satellite images. The phase speeds were in good agreement with the theoretical calculations using the Taylor-Goldstein (T-G) equation with a non-linear term. The ISW phase speed decreases from east to west and from south to north. The temporal variability of ISW phase speeds are mainly affected by water depth, with minor seasonal variations.