Fig. 4.
(A) Published empirical relationships between ratios of blue-to-green reflectance, Rrs(490)/Rrs(555), and chlorophyll for different regions of the Southern Ocean and phytoplankton taxa. These relationships were developed with OC2V2, but results should be similar for the wavelength-switching OC4V4 algorithm. (B) Data collected along the Antarctic Peninsula show fluorometrically derived Chl ≈1.7-fold higher than coincident HPLC estimates. Solid line is best fit, and light dotted line is from Antarctic Polar Front Zone (47).