Fig. 7
Chl a HPLC calibration. Mean Chl a profiles shown in (a) for HPLC Chl a observation (solid black line), Seaglider Chl a using factory calibration coefficients (black dashed line), Seaglider Chl a corrected with slope factor of 2 (blue dashed line), and Seaglider Chl a corrected with HPLC linear regression (red dashed line). Residuals (HPLC Chl a – Seaglider Chl a) from the (b) Factory calibrated Fchla (grey boxplots) are minimized using (c) HPLC regression coefficients (red boxplots). On each boxplot, the central mark indicates the median, and the left and right edges of the box indicate the 25th and 75th percentiles, respectively. The whiskers extend to the most extreme data points not considering outliers, and the outliers (i.e. values more than 1.5 the interquartile range away from the top or bottom of the box) are plotted individually as open blue circles.
