| Summary: | In order to strengthen the dynamic monitoring of marine ecological disasters such as red tides and scientifically support marine disaster prevention and mitigation, this paper selected Beibu Gulf, Maoming Coast and Lingshui Bay as the study areas, analyzed the remote sensing images, chlorophyll a concentration and red tide index characteristics for 4 cases of red tide events that occurred in February 2021, based on the coastal zone imager data onboard the Chinese Haiyang-1D (HY-1D) satellite. The results showed that the remote sensing images could clearly show the distribution of red tides, the abnormal value ranges of chlorophyll a concentration and red tide index were consistent with the remote sensing images, and the chlorophyll a concentration and red tide index of red tide waters were higher than those of non-red tide waters.
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