Fig. 5From: Use of GOCI-II images for detection of harmful algal blooms in the East China SeaResults of bloom type classification derived from existing models from September 1 and September 21, 2021 separately. a BI index (Shang et al. 2014), b PDI and DI index (Tao et al. 2015), and c \({R}_{\_slope}\) index (Shen et al. 2019b). The squares and circles represent the sea areas south of Taizhou and Yuhuan as the centers, respectivelyBack to article page