Fig. 3
From: Floats with bio-optical sensors reveal what processes trigger the North Atlantic bloom
Rate of change of physical and biological variables. Median (solid thick line) and interquartile range (vertical bars) of the rate of change of mixed layer depth (a, \(\frac{1}{H}\frac{\partial H}{\partial t}\)), the net phytoplankton population growth rate (b, rp), and phytoplankton division rates (c, μp), estimated from the 12 time series collected by the floats. The time axis is rescaled by the onset times of the weak winter accumulation phase (t1) and the spring bloom (t2) introducing \(\tau = \left( {t - t_1} \right)/\left( {t_2 - t_1} \right)\). τ = 0 corresponds to the initiation of the weak winter accumulation phase and τ = 1 corresponds to the initiation of the spring bloom. The time span between τ = 0 and τ = 1 corresponds to the duration of the weak winter accumulation phase and it is ~120 days long
