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Table 1

Yearly root mean square error (RMSE) and relative root mean square error (RRMSE) based on depth average data between the surface and 30 m depth. Minimal values of the nine pixels around the cell corresponding to the monitoring station were considered. RMSE is expressed in the unit of the variable (Chla (μg l−1), NH4 (μg NH4 l−1), NO3 (mg NO3 l−1), TP (μgP l−1) and SDD (m)), and RRMSE is expressed in % regardless of the variable.

  2009 2010


  SHL2 GE3 SHL2 GE3




  RMSE RRMSE RMSE RRMSE RMSE RRMSE RMSE RRMSE
Chla 2.48 33 5.50 33 1.95 30 2.19 30
NH4 15 70 15 97 14 32 9 22
NO3 0.19 25 0.35 110 0.35 43 0.50 238
TP 3 18 7 79 2 15 2 16
SDD 2.9 28 2.9 43 2.5 24 1.7 21

  2011 2012


  SHL2 GE3 SHL2 GE3




  RMSE RRMSE RMSE RRMSE RMSE RRMSE RMSE RRMSE

Chla 1.59 20 3.57 46 2.29 38 2.59 86s
NH4 7 22 12 24 9 16 6 16
NO3 0.36 30 0.51 184 0.15 17 0.48 150
TP 3 20 4 28 3 17 5 48
SDD 2.8 26 2.7 38 3.1 25 3.1 69

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