Fig. 3
From: The open-ocean missing backscattering is in the structural complexity of particles
Realistic sets of coated-sphere model parameters. Combinations of coat thickness (tk2) and refractive index (n2) that minimise the systematic error (Bias) of predictions for bbp coefficients at 532 nm using a coated-sphere model with respect to in-situ optical measurements. tk2 is expressed as a fraction of the radius of the modelled spherical particle. The volume-averaged refractive index n is set equal to 1.06. Variations of the refractive index of the core (n1) as a function of tk2 and n2 are also shown. Black stars indicate the 12 realistic combinations of coated-model parameters selected for particle populations at the ocean surface (5 m) and at the DCM level. The dashed line is the fit to the realistic sets of coated-sphere parameters and corresponds to n2 = 1.013 ( ± 0.003) tk2−0.051 (±0.002) (r = 0.99, p < 0.01, N = 12)
