Description of algorithm
Interpretation of results

Validation of ice thickness - Full domain

Bulletin date: 2022-12-15

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 -0.5   0.69   37424 7827 29542 55
Day 1 forecast -0.51   0.7   37424 8091 29283 50
Day 4 forecast -0.52   0.71   37424 8337 29042 45
Day 7 forecast -0.51   0.69   37424 7836 29542 46
Day 10 forecast -0.53   0.71   37424 8519 28856 49

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
c21 - 1.5m
c31.5 - 2m
c42 - 2.5m
c52.5 - 3m
c6>3m

Best estimate vs. observations

Contingency table

observations
open c1 c2 c3 c4 c5 c6
m
o
d
e
l
open 0 0.001 0 0.001 0 0 0
c1 0 0.022 0.242 0.114 0.016 0.005 0.004
c2 0 0.001 0.071 0.131 0.041 0.004 0.001
c3 0 0 0.011 0.066 0.094 0.02 0.004
c4 0 0 0.001 0.026 0.091 0.021 0.004
c5 0 0 0 0 0.004 0.004 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 0.001 0.001 0.001 0 0 0
c1 0 0.022 0.243 0.12 0.016 0.005 0.004
c2 0 0.001 0.07 0.126 0.044 0.005 0.001
c3 0 0 0.011 0.065 0.09 0.02 0.004
c4 0 0 0.001 0.026 0.093 0.022 0.004
c5 0 0 0 0 0.002 0.003 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 0.001 0.001 0.001 0 0 0
c1 0 0.021 0.24 0.119 0.015 0.004 0.004
c2 0 0.002 0.074 0.126 0.044 0.006 0.001
c3 0 0 0.009 0.069 0.091 0.02 0.004
c4 0 0 0.001 0.023 0.093 0.022 0.003
c5 0 0 0 0 0.002 0.003 0
c6 0 0 0 0 0 0 0

See category definitions for details.

Statistical distribution

Sea ice thickness, day 7 forecast


Generated by /metno/routine/sms/V2/SIthickness/c2iceWebPage.sh Fri 30 Dec 2022 02:11:53 AM UTC on arcval

 
See Met Privacy