Validation of ice thickness - Full domain
Bulletin date: 2023-11-30
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 | -0.46 | 0.69 | 33361 | 6890 | 26444 | 27 |
Day 1 forecast | -0.47 | 0.69 | 33361 | 7152 | 26180 | 29 |
Day 4 forecast | -0.48 | 0.7 | 33361 | 7389 | 25945 | 27 |
Day 7 forecast | -0.46 | 0.68 | 33361 | 6894 | 26437 | 30 |
Day 10 forecast | -0.54 | 0.74 | 33361 | 8714 | 24628 | 19 |
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 | |
c1 | 0 | 0.047 | 0.315 | 0.076 | 0.01 | 0.002 | 0.005 | ||
c2 | 0 | 0.001 | 0.088 | 0.139 | 0.024 | 0.002 | 0.002 | ||
c3 | 0 | 0 | 0.014 | 0.141 | 0.063 | 0.005 | 0.001 | ||
c4 | 0 | 0 | 0 | 0.012 | 0.036 | 0.01 | 0 | ||
c5 | 0 | 0 | 0 | 0 | 0.002 | 0.002 | 0 | ||
c6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
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 | |
c1 | 0 | 0.047 | 0.315 | 0.077 | 0.011 | 0.002 | 0.005 | ||
c2 | 0 | 0.001 | 0.088 | 0.142 | 0.025 | 0.002 | 0.002 | ||
c3 | 0 | 0 | 0.013 | 0.137 | 0.062 | 0.005 | 0.001 | ||
c4 | 0 | 0 | 0.001 | 0.012 | 0.037 | 0.01 | 0 | ||
c5 | 0 | 0 | 0 | 0 | 0.001 | 0.002 | 0 | ||
c6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
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 | |
c1 | 0 | 0.047 | 0.31 | 0.075 | 0.011 | 0.002 | 0.005 | ||
c2 | 0 | 0.001 | 0.093 | 0.143 | 0.025 | 0.002 | 0.002 | ||
c3 | 0 | 0 | 0.013 | 0.138 | 0.061 | 0.005 | 0.001 | ||
c4 | 0 | 0 | 0.001 | 0.012 | 0.037 | 0.01 | 0 | ||
c5 | 0 | 0 | 0 | 0 | 0.002 | 0.002 | 0 | ||
c6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
See category definitions for details.
Statistical distribution
Sea ice thickness, day 7 forecast
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