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Quality monitoring of ODYSSEA analysis

SST-Reconstruction

ODYSSEA is the CERSAT product line for high resolution Sea Surface Temperature (SST) analyses (L4) analyses. The quality of ODYSSEA products is monitored through comparisons with verious sources and are updated daily. The bias and standard deviation of these differences are presented here as time series plots with interactive features.

 The ODYSSEA SST analyses are compared to the following sources :

  • drifting buoys : in situ drifting buoys constitute a completely independant reference to which ODYSSEA products can be compared to, since they are not used in the data merging (unlike many other analyses), despite they don't correspond exactly to the same sensing depth as the satellite data. Only nighttime measurements are selected in the comparison, to approach the foundation SST estimated by ODYSSEA, processed and averaged onto the same grid as the ODYSSEA products.
  • AATSR : AATSR is arguably one of the most accurate and stable sensors and so considered as a good reference for comparison, despite it is not an independent source (AATSR is used in ODYSSEA merging process) and it does not correspond exactly to the same sensing depth (skin sea surface temperature) as the ODYSSEA products (foundation sea surface temperature) and there is a significant shift between these two depths. Only nighttime measurements are selected in the comparison processed, and averaged onto the same grid as the ODYSSEA products.
  • climatology : The climatology used for comparison is derived from the NODC/Casey climatology, resampled to ODYSSEA temporal and spatial resolution
  • previous day analysis : high differences with the previous day analysis are a strong indicator for input data or processing issues

 

These comparisons are accessible through the following links :

Global 0.1 deg analysis
(and intermediate single sensor
or multi-sensor composites)

in situ AATSR climatology previous day

Regional 0.02 deg analyses

in situ