Mr. Xiaoguang Huang Profile

Xiaoguang Huang

at Second Institute of Oceanography SOA

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Publications (2)

Proceedings Article | 14 October 2019 Paper

Threshold stability of different algorithms for green tide detection base on geostationary ocean color imager

Xiaoguang Huang, Difeng Wang, Fang Gong, Xianqiang He, Yan Bai, Zhihong Wang, Qiankun Zhu

Proceedings Volume 11150, 1115018 (2019) https://doi.org/10.1117/12.2532542

KEYWORDS: Earth observing sensors, Landsat, Satellites, Detection and tracking algorithms, Satellite imaging, Imaging systems

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Proceedings Article | 12 December 2018 Paper

Spectral characteristics of Sargassum horneri in seawater

Xiaoguang Huang, Difeng Wang, Menglin Bao, Fang Gong, Yan Bai

Proceedings Volume 10850, 108500Y (2018) https://doi.org/10.1117/12.2505672

KEYWORDS: Remote sensing, Reflectivity, Satellites, Ocean optics, Earth observing sensors, Buildings, Landsat, Satellite imaging, MODIS, Spectroscopy

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In recent years, blooms of Sargassum horneri have occurred frequently in the Yellow Sea and the East China Sea. Optical satellite remote sensing is an important means to monitor Sargassum horneri, the method being based mainly on exploiting the significant spectral differences between the water mixed with Sargassum horneri and the background seawater. Thus, it is necessary to study the spectral characteristics of Sargassum horneri in seawater with a view to improving measurement accuracy. To date, both laboratory-based experiments concerning the spectral characteristics of Sargassum horneri as well as satellite-based remote sensing monitoring have been performed, but these studies have focused mainly on large areas of Sargassum horneri, and there has been limited recognition of the differences in the spectral characteristics for situations where the Sargassum horneri outbreak is early, and where the Sargassum horneri and the background seawater have just mixed. In this study, experiments have been designed to carefully examine the spectral characteristics of Sargassum horneri in seawater.

The main findings are: (1) In general, the spectral distribution for the two forms of Sargassum (the strip form and the uniformly distributed form) are similar. (2) The peak wavelengths for the two forms of Sargassum horneri in seawater are different. The peak maximum for the strip form is at 825 nm while that for the uniformly distributed form is at 725 nm. Thus, spectral measurements may be used to distinguish between the two forms. (3) The concentration of suspended matter in the background seawater may influence the spectral characteristics of Sargassum horneri in seawater. These findings have great significance for remote sensing of the mixed state of Sargassum horneri in seawater, namely, the possibility for differentiation of the uniformly distributed form and strip distribution form. Also, the results have important implications for remote sensing of Sargassum horneri in seawater where the concentrations of suspended matter are variable.

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