High-Resolution Satellite Observations of a New Hazard of Golden Tides Caused by Floating Sargassum in Winter in the Yellow Sea
High-Resolution Satellite Observations of a New Hazard of Golden Tides Caused by Floating Sargassum in Winter in the Yellow Sea
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DOI：
10.1109/lgrs.2017.2737079
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发表时间：
2017-08
影响因子：
4.8
通讯作者：
Q. Xing;Ruihong Guo;Lingling Wu;Deyu An;Ming Cong;S. Qin;Xuerong Li
中科院分区：
文献类型：
--
作者：
Q. Xing;Ruihong Guo;Lingling Wu;Deyu An;Ming Cong;S. Qin;Xuerong Li
2016年12月，黄海海域发生了一种由浮游褐藻-马尾藻引起的新的海洋灾害--金潮。据估计，江苏浅滩的海藻养殖业受到破坏，造成的经济损失达5亿人民币CNY（约7300万美元）。本文利用中国“高分”卫星搭载的高分辨率光学相机拍摄的图像，反演了漂浮马尾藻的漂流路径及其起源。首次发现了黄海西部浮游马尾藻向南漂移的路径，其水华发生的初始位置位于中国山东半岛东端附近，暗示了这一浮游马尾藻灾害的起源。利用适合高分辨率图像的线性混合模型对江苏浅滩海藻水华事件的规模进行了评估。结果表明，2016年12月31日GF-1宽视场影像中包含马尾藻的像元总面积超过46 km 2，根据线性混合模型估算，马尾藻完全覆盖的海面总面积超过8.8 km 2。本文的研究方法和结果对今后我国沿海沃茨的金潮研究和管理具有一定的参考价值。
A new marine hazard of golden tides caused by floating brown macroalgae-Sargassum occurred in the Yellow Sea in December 2016. An economic loss of 0.5 billion CNY (about U.S. $73 million) was estimated due to the damaged seaweed aquaculture in the Jiangsu Shoal, China. In this letter, images from the new Chinese satellite of Gaofen (GF) with high-resolution optical cameras are used to retrieve the drifting path of floating Sargassum and its origin. A southward drifting path of floating Sargassum in the western Yellow Sea is identified for the first time, and the initial site of bloom occurrence is near the eastern end of the Shandong Peninsula, China, implying the origin of this hazard of floating Sargassum. The scale of this Sargassum bloom event in the Jiangsu Shoal is also evaluated using a linear-mixing model suitable for high-resolution images. The result shows that the total area of Sargassum-containing pixels in the GF-1 wide-field-of-view images on December 31, 2016 was more than 46 km2, and according to the estimation by the linear-mixing model, the total area of sea surface completely covered by Sargassum was above 8.8 km2. The approach and the results presented in this letter should contribute to the future study and management of golden tides in Chinese coastal waters.