Validation of ice thickness - Full domain
Bulletin date: 2017-04-20
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 | -0.68 | 0.85 | 45353 | 12780 | 32460 | 113 |
| Day 1 forecast | -0.69 | 0.85 | 45353 | 12866 | 32377 | 110 |
| Day 4 forecast | -0.69 | 0.85 | 45353 | 12965 | 32283 | 105 |
| Day 7 forecast | -0.68 | 0.84 | 45353 | 12541 | 32717 | 95 |
| Day 10 forecast | -0.7 | 0.86 | 45353 | 13017 | 32238 | 98 |
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 | 0.003 | 0.06 | 0.1 | 0.03 | 0.007 | 0.003 | ||
| c2 | 0 | 0.001 | 0.019 | 0.157 | 0.171 | 0.051 | 0.006 | ||
| c3 | 0 | 0 | 0.005 | 0.07 | 0.099 | 0.037 | 0.006 | ||
| c4 | 0 | 0 | 0 | 0.003 | 0.045 | 0.041 | 0.007 | ||
| c5 | 0 | 0 | 0 | 0.001 | 0.01 | 0.022 | 0.022 | ||
| c6 | 0 | 0 | 0 | 0 | 0.001 | 0.004 | 0.02 | ||
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 | 0.003 | 0.059 | 0.101 | 0.03 | 0.008 | 0.003 | ||
| c2 | 0 | 0.001 | 0.019 | 0.157 | 0.17 | 0.051 | 0.006 | ||
| c3 | 0 | 0 | 0.005 | 0.07 | 0.1 | 0.038 | 0.006 | ||
| c4 | 0 | 0 | 0 | 0.003 | 0.046 | 0.042 | 0.007 | ||
| c5 | 0 | 0 | 0 | 0 | 0.009 | 0.021 | 0.022 | ||
| c6 | 0 | 0 | 0 | 0 | 0.001 | 0.004 | 0.019 | ||
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 | 0.003 | 0.057 | 0.093 | 0.03 | 0.008 | 0.003 | ||
| c2 | 0 | 0.001 | 0.021 | 0.16 | 0.167 | 0.049 | 0.006 | ||
| c3 | 0 | 0 | 0.005 | 0.073 | 0.102 | 0.04 | 0.006 | ||
| c4 | 0 | 0 | 0 | 0.003 | 0.047 | 0.041 | 0.007 | ||
| c5 | 0 | 0 | 0 | 0 | 0.009 | 0.021 | 0.021 | ||
| c6 | 0 | 0 | 0 | 0 | 0.001 | 0.003 | 0.02 | ||
See category definitions for details.
Statistical distribution
|
|
Sea ice thickness, day 7 forecast
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