基于高分光学遥感探测东沙岛北部第二模态内孤立波

Detection of Mode-2 Internal Solitary Waves in Northern Dongsha Atoll Based on High Resolution Optical Remote Sensing

收集高分一号光学遥感图像对南中国海东沙岛北部第二模态内孤立波进行研究,对2014年4月至10月期间的光学遥感图像处理.结果表明:第二模态内孤立波分布在东沙岛的北部,在第一模态内孤立波后方;与第一模态内孤立波相比,第二模态内孤立波的波峰线短,长度约为第一模态的20%至40%;第二模态内孤立波的表面亮暗间距小,宽度约为第一模态的10%至50%.高分辨率光学遥感图像可用于第二模态内孤立波精细结构的研究,为定量研究内孤立波的能量传播、破碎和耗散提供依据.

The GF-1 optical high resolution images have been collected to study mode-2 ISWs of northern Dongsha Atoll in the South China Sea.Based on optical remote sensing images from April to October2014,mode-2 ISWs spatial distributed in northern Dongsha Atoll,following mode-1 ISWs.Compared with mode-1 ISWs,the crest of mode-2 ISWs was shorter and the length was about 20% to 40% of mode-1.The distance between the positive and negative peaks of mode-2 ISWs was also shorter,the length was about 10%to 50% of mode-1.The fine structure of mode-2 ISWs was investigated by high resolution optical remote sensing images,which offers the references for quantitative study of the energy propagation,fragmentation and dissipation of internal solitary waves.