Fig. 3. Dependence of km on surface irradiance I(0). Solid and dashed lines shows km value averaged over 23 stations the Baltic Sea and band of standard deviation accordingly.

Designations: 1 - km > 7*10^-5; 2 – km < 7*10^-5.

Fig. 4. The dependence of I_1/2m on the average chlorophyll a content in water column and polynomial regression of this dependence (A). Histogram of distribution of the ratio of I_1/2m to results of polynomial regression (B).