GEM Climate Performance over Arctic
*** A Simulation on MARVIN ***
Minwei QIAN, Colin Jones, Katja Winger
Model Configuration
Resolution: 0.5 degreeGrid number: 182*154Simulation Period: 1983-2002
182
162
142
154 134 114
Average states
GEM ERA40 Diff
Winter
Summer
Sea Level Pressure
GEM ERA40 Diff
Winter
Summer
Geo. Potential Height (500mb)
GEM ERA40 Diff
Winter
Summer
Sensible Heat Fluxes (W/M2)
GEM ERA40 Diff
Winter
Summer
Latent Heat Fluxes (W/M2)
GEM ERA40 Diff
Winter
Summer
Solar Radiation downward (W/M2)
GEM ERA40 Diff
Winter
Summer
Cloud cover (%)
GEM ERA40 Diff
Winter
Summer
Longwave Radiation downward (W/M2)
GEM ERA40 Diff
Winter
Summer
T2M Temperature C
Variability
Standard deviation for T2M in JJA (interannual mean)
GEM ERA40
Standard deviation for T2M in DJF (interannual mean)
GEM ERA40
Standard deviation for SLP in JJA (interannual mean)
GEM ERA40
Standard deviation for SLP in DJF (interannual mean)
GEM ERA40
Standard deviation for Geo Potential in JJA (interannual mean)
GEM ERA40
Standard deviation for Geo Potential in DJF (interannual mean)
GEM ERA40
Summer Winter
SLP 2~8 mb 0~4 mb
Geo. Potential (500mb) 40~80 m 20~40 m
T2M -1 C 5~7 C
Sensible Heat 3~5 W/M2 10~20 W/M2
Latent Heat -5~-3 W/M2 (less ev) ~5 W/M2 (more ev)
Net Longwave -10~-5 W/M2 5~15 W/M2
Net Shortwave 10~15 W/M2 0 W/M2
Longwave downward ~ -10 W/M2 20~40 W/M2
Shortwave downward 10~40 W/M2 0 W/M2
Cloud cover -5 % 20%
Summary 1Over Arctic only
Summary 2. GEM captures interannual variability of climate.Interannual variability is larger in winter than in summer.
Geo. Potential Height (500mb) 1984-1992
GEM_LAM - ERA40 GEM_Global_Stretched - ERA40Summer
Winter
ERA40
GEM_LAM ERA40 GEM_Global_StretchedSummer
Winter
Standard deviation for Geo Potential 500 mb (interannual mean)
Merci!