Validation of ice thickness - Full domain
Bulletin date: 2019-04-25
Model: ARC MFC - TOPAZ
Data source: UCL CryoSAT-2 sea ice thickness
Validation statistics summary
Bias (m) | RMS (m) | total grids | low SIT | OK SIT | high SIT | |
---|---|---|---|---|---|---|
Best estimate | -1.03 | 1.19 | 48010 | 22975 | 24986 | 49 |
Day 1 forecast | -1.02 | 1.18 | 48010 | 22767 | 25190 | 53 |
Day 4 forecast | -1.03 | 1.18 | 48010 | 22829 | 25124 | 57 |
Day 7 forecast | -1.02 | 1.18 | 48010 | 22448 | 25509 | 53 |
Day 10 forecast | -1.01 | 1.17 | 48010 | 22086 | 25866 | 58 |
Numbers in the three rightmost columns are grid counts. Regions with high/low sea ice thickness correspond to areas with model offsets from the gridded observations outside of one standard deviation. (Standard deviations are provided in the observational product.)
Definition of categories:
Category | Sea ice thickness |
---|---|
c1 | <1m |
c2 | 1 - 1.5m |
c3 | 1.5 - 2m |
c4 | 2 - 2.5m |
c5 | 2.5 - 3m |
c6 | >3m |
Best estimate vs. observations
Contingency table
observations | |||||||||
---|---|---|---|---|---|---|---|---|---|
open | c1 | c2 | c3 | c4 | c5 | c6 | |||
m o d e l |
open | 0 | 0 | 0 | 0.001 | 0 | 0 | 0.001 | |
c1 | 0 | 0.003 | 0.049 | 0.145 | 0.067 | 0.017 | 0.014 | ||
c2 | 0 | 0 | 0.006 | 0.09 | 0.149 | 0.049 | 0.014 | ||
c3 | 0 | 0 | 0.004 | 0.05 | 0.109 | 0.081 | 0.023 | ||
c4 | 0 | 0 | 0.001 | 0.002 | 0.007 | 0.019 | 0.062 | ||
c5 | 0 | 0 | 0 | 0 | 0.001 | 0.002 | 0.029 | ||
c6 | 0 | 0 | 0 | 0 | 0 | 0.001 | 0.006 |
See category definitions for details.
Statistical distribution
Observed sea ice thickness from CryoSAT
Sea ice thickness, best estimate product
Day 1 forecast vs. observations
Contingency table
observations | |||||||||
---|---|---|---|---|---|---|---|---|---|
open | c1 | c2 | c3 | c4 | c5 | c6 | |||
m o d e l |
open | 0 | 0 | 0 | 0.001 | 0 | 0 | 0.001 | |
c1 | 0 | 0.003 | 0.049 | 0.144 | 0.066 | 0.016 | 0.013 | ||
c2 | 0 | 0 | 0.006 | 0.091 | 0.15 | 0.049 | 0.014 | ||
c3 | 0 | 0 | 0.004 | 0.049 | 0.108 | 0.082 | 0.023 | ||
c4 | 0 | 0 | 0.001 | 0.002 | 0.007 | 0.019 | 0.062 | ||
c5 | 0 | 0 | 0 | 0 | 0.001 | 0.002 | 0.029 | ||
c6 | 0 | 0 | 0 | 0 | 0 | 0.001 | 0.006 |
See category definitions for details.
Statistical distribution
Sea ice thickness, day 1 forecast
Day 7 forecast vs. observations
Contingency table
observations | |||||||||
---|---|---|---|---|---|---|---|---|---|
open | c1 | c2 | c3 | c4 | c5 | c6 | |||
m o d e l |
open | 0 | 0 | 0 | 0.001 | 0 | 0 | 0.001 | |
c1 | 0 | 0.003 | 0.048 | 0.143 | 0.066 | 0.016 | 0.013 | ||
c2 | 0 | 0 | 0.006 | 0.09 | 0.148 | 0.048 | 0.014 | ||
c3 | 0 | 0 | 0.004 | 0.05 | 0.11 | 0.082 | 0.023 | ||
c4 | 0 | 0 | 0.001 | 0.002 | 0.008 | 0.02 | 0.061 | ||
c5 | 0 | 0 | 0 | 0 | 0.001 | 0.002 | 0.029 | ||
c6 | 0 | 0 | 0 | 0 | 0 | 0.001 | 0.006 |
See category definitions for details.
Statistical distribution
Sea ice thickness, day 7 forecast
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