Validation of ice thickness - Full domain
Bulletin date: 2022-12-29
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 | -0.45 | 0.65 | 40252 | 6649 | 33535 | 68 |
Day 1 forecast | -0.45 | 0.66 | 40252 | 6830 | 33351 | 71 |
Day 4 forecast | -0.46 | 0.66 | 40252 | 7008 | 33174 | 70 |
Day 7 forecast | -0.44 | 0.65 | 40252 | 6679 | 33491 | 82 |
Day 10 forecast | -0.48 | 0.68 | 40252 | 7710 | 32483 | 59 |
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 | 0.001 | 0 | 0 | |
c1 | 0 | 0.018 | 0.2 | 0.097 | 0.02 | 0.005 | 0.003 | ||
c2 | 0 | 0.003 | 0.114 | 0.132 | 0.024 | 0.005 | 0.001 | ||
c3 | 0 | 0 | 0.016 | 0.081 | 0.105 | 0.017 | 0.003 | ||
c4 | 0 | 0 | 0.002 | 0.036 | 0.084 | 0.024 | 0.005 | ||
c5 | 0 | 0 | 0 | 0 | 0.002 | 0.003 | 0.001 | ||
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 | 0.001 | 0 | 0 | 0.001 | 0 | 0 | |
c1 | 0 | 0.017 | 0.199 | 0.098 | 0.02 | 0.005 | 0.002 | ||
c2 | 0 | 0.004 | 0.114 | 0.135 | 0.027 | 0.006 | 0.002 | ||
c3 | 0 | 0 | 0.016 | 0.075 | 0.107 | 0.021 | 0.004 | ||
c4 | 0 | 0 | 0.002 | 0.038 | 0.078 | 0.019 | 0.004 | ||
c5 | 0 | 0 | 0 | 0 | 0.003 | 0.003 | 0.001 | ||
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 | 0.001 | 0 | 0 | 0.001 | 0 | 0 | |
c1 | 0 | 0.017 | 0.188 | 0.095 | 0.019 | 0.004 | 0.002 | ||
c2 | 0 | 0.004 | 0.122 | 0.139 | 0.029 | 0.006 | 0.002 | ||
c3 | 0 | 0 | 0.018 | 0.073 | 0.107 | 0.023 | 0.004 | ||
c4 | 0 | 0 | 0.002 | 0.039 | 0.076 | 0.016 | 0.004 | ||
c5 | 0 | 0 | 0 | 0 | 0.003 | 0.004 | 0.001 | ||
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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