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The linear relationship between (A) NO2-+NO3- [μM], (B) TChl a biomass of the upper 100 m water column integration [mg m-2], (C) TChl a biomass at DCML [mg m-3], (D) TChl a biomass at surface layer [mg m-3] and the temperature at the 50 m depth layer. The two red dashed lines in Fig 8A indicate 23.0°C and 26.0°C, which were the frontal temperature gradients. The solid line shows the linear regression, and the two dashed lines the 95% upper confidence limit and lower confidence limit.
