Interim reanalysis validation

BGC-Argo float: skill metrics

Statistics of bias and root mean square difference (rmse) are computed weekly for the interim reanalysis in selected large sub-basins and layers. Number of available floats in grey.

Time evolution of BGC-Argo float - 

Hovmoller diagrams of chlorophyll concentration (mg/m³) from float data (2^nd row) and model outputs (3^rd row) matched-up with float position (1^st row) in the previous 24 months. From 4^th to 7^th rows, computation of selected skill indexes for model (solid line) and float data (dots). The skill indexes are respectively: surface (SURF) and 0‑200 m vertically averaged (INTG) chlorophyll, correlation (CORR), depth of the deep chlorophyll maximum (DCM, blue) and depth of the mixed layer bloom in winter (MWB, red). Trajectory of the BGC‑Argo floats is reported in the upper panel, with deployment position (blue cross).

Hovmoller diagrams of nitrate concentration (mmol/m³) from float data (2^nd row) and model outputs (3^rd row) matched-up with float position (1^st row) in the previous 24 months. From 4^th to 7^th rows, computation of selected skill indexes for model (solid line) and float data (dots). The skill indexes are respectively: nitrate concentration at surface (SURF) and 0‑200 m vertically averaged concentration (INTG), correlation between profiles (CORR), depth of the nitracline computed as NITRCL1 and NITRCL2. Trajectory of the BGC‑Argo floats is reported in the upper panel, with deployment position (blue cross).

Hovmoller diagrams of oxygen concentration from float data (2^nd row) and model outputs (3^rd row) matched-up with float position (1^st row) for the interim reanalysis. From 4^th to 7^th rows, computation of selected skill indexes for model (solid line) and float data (dots). The skill indexes are respectively: oxygen concentration at surface (SURF) and oxygen at saturation, 0‑200 m vertically averaged concentration (INTG), correlation between profiles (CORR), depth of oxygen minimum zone (between 200‑1000 m) and depth of maximum “surface” oxygen (between 0‑200 m). BGC‑Argo floats is reported in the upper panel, with deployment position (blue cross).

Hovmoller diagrams of phytoplankton biomass (mgC/m3) from float data (2nd row) and model outputs (3rd row) matched-up with float position (1st row) in the previous 24 months. From 4th to 6th rows, computation of selected skill indexes for model (solid line) and float data (dots). The skill indexes are respectively: surface (SURF) and 0‑200 m vertically averaged (INTG 0-200) phytoplankton biomass, and correlation (CORR). Trajectory of the BGC‑Argo floats is reported in the upper panel, with deployment position (blue cross).

Timeseries

Time series of last years of the interim renalysis superimposed to the 1999-2019 reanalysis timeseries.