The pelagic biogeochemical model.

<p>The ECO3M-MASSILIA-noP (only white-colored variables) and ECO3M-MASSILIA-P (white- and purple-colored variables) versions of the biogeochemical model are represented.</p

Surface model and data comparison at the Somlit station from 2009 to 2011.

<p>n: the number of in-situ data available for comparison, std : the standard deviation.</p

Evolution of temperature and phytoplankton nutrient limitation for the year 2008.

<p>Phytoplankton limitation by P (grey point) and N (blue point) and model temperature (blue line) for the year 2008 at the Somlit station at the surface (A) and at 60 m (B).</p

Map of the Gulf of Lion and the model domain.

<p>The RHOMA model domain (red dotted lines), the Bay of Marseille (green rectangle), the “Cote Bleue” and “Calanques” upwelling spots (blue circles), the Rhone River plume and intrusion zone (in brown) and the Northern current (NC) are represented.</p

Impact of the intrusion of Rhone River water on phytoplankton nutrient limitation and chlorophyll-a concentrations.

<p>Evolution from May to mid-August 2008 at the Somlit station of the simulated phytoplankton limitation by P (grey point) and N (blue point) and the simulated salinity (red line) (A), the surface chlorophyll-a concentrations from remote sensing observations of MODIS (green point) and MERIS (blue point), the in-situ data (bleu point) and the simulation with the P cycle (black line) and without the P cycle (blue line) (B).</p

Bottom model and data comparison at the Somlit station from 2009 to 2011.

<p>Bottom model and data comparison at the Somlit station from 2009 to 2011.</p

Surface model/data time series comparisons for temperature, chlorophyll-a and NO₃.

<p>Time series of the monthly mean temperature (°C)(A), chlorophyll-a concentration (µg.L-1) (B) and NO₃ concentration (µmol.L-1) (C) from the model with the P cycle (grey) and the model without P (black), with one standard deviation (error bar), compared with the in-situ data (blue) at the Somlit station.</p

Concentrations of River inputs (µmol.L⁻¹).

<p>RR: Rhone River daily measured concentrations; f(RD) : concentrations linked to urban rivers discharges.</p

Biogeochemical model variables (ECO3M-MASILLIA-P version).

<p>Only variables from 1 to 12 for ECO3M-MASILLIA-noP version. Units in µmol.L⁻¹ except Chlotophyll-a which is in µg.L⁻¹.</p

Target diagrams of the model/data comparison.

<p>Target diagrams of a set of variables for the model with the P cycle (A–C) and without the P cycle (B–D). The model/data comparison is made using in-situ data for the years 2009 to 2011 at the surface (A–B) and at 55 m (bottom C–D) at the Somlit station. The normalized bias (dimensionless) was computed versus the sign unbiased normalized RMSD (dimensionless).</p