Validation of ice thickness - Full domain
Bulletin date: 2023-01-05
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 | -0.38 | 0.61 | 33886 | 5282 | 28460 | 144 |
Day 1 forecast | -0.39 | 0.62 | 33886 | 5311 | 28421 | 154 |
Day 4 forecast | -0.39 | 0.62 | 33886 | 5392 | 28336 | 158 |
Day 7 forecast | -0.38 | 0.62 | 33886 | 5291 | 28432 | 163 |
Day 10 forecast | -0.4 | 0.64 | 33886 | 5632 | 28077 | 177 |
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 | 0 | 0 | |
c1 | 0 | 0.019 | 0.153 | 0.076 | 0.018 | 0.004 | 0.002 | ||
c2 | 0 | 0.005 | 0.152 | 0.121 | 0.023 | 0.003 | 0.002 | ||
c3 | 0 | 0 | 0.015 | 0.112 | 0.104 | 0.015 | 0.003 | ||
c4 | 0 | 0 | 0.003 | 0.043 | 0.084 | 0.029 | 0.005 | ||
c5 | 0 | 0 | 0 | 0 | 0.003 | 0.003 | 0.003 | ||
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 | 0 | 0 | 0 | |
c1 | 0 | 0.018 | 0.145 | 0.073 | 0.017 | 0.004 | 0.002 | ||
c2 | 0 | 0.006 | 0.159 | 0.128 | 0.026 | 0.003 | 0.002 | ||
c3 | 0 | 0 | 0.015 | 0.107 | 0.104 | 0.017 | 0.004 | ||
c4 | 0 | 0 | 0.003 | 0.044 | 0.082 | 0.027 | 0.004 | ||
c5 | 0 | 0 | 0 | 0 | 0.003 | 0.003 | 0.002 | ||
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 | 0 | 0 | 0 | |
c1 | 0 | 0.017 | 0.132 | 0.069 | 0.018 | 0.004 | 0.002 | ||
c2 | 0 | 0.006 | 0.17 | 0.131 | 0.028 | 0.006 | 0.002 | ||
c3 | 0 | 0 | 0.017 | 0.106 | 0.103 | 0.016 | 0.004 | ||
c4 | 0 | 0 | 0.003 | 0.045 | 0.081 | 0.025 | 0.004 | ||
c5 | 0 | 0 | 0 | 0 | 0.003 | 0.003 | 0.002 | ||
c6 | 0 | 0 | 0 | 0 | 0 | 0 | 0.001 |
See category definitions for details.
Statistical distribution
Sea ice thickness, day 7 forecast
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