A Comparison of GFS Analyses and Forecasts to ECMWF

 

October 2004

 

Height

 

Zonal means

 

Errors

 

ECMWF

GFS

1 day

1 day

3 day

3 day

5 day

5 day

10 day

10 day

 

Differences GFS-EC

 

Anl

1 day

3 day

5 day

10 day

 

500 hPa

 

Zonally Asymmetric

 

ECMWF

GFS

Analysis

Analysis

3 day

3 day

5 day

5 day

10 day

10 day

 

Errors

 

ECMWF

GFS

1 day

1 day

3 day

3 day

5 day

5 day

10 day

10 day

 

Differences GFS-EC

 

Anl

1 day

3 day

5 day

10 day

 

Temperature

 

Zonal mean

 

Errors

 

ECMWF

GFS

1 day

1 day

3 day

3 day

5 day

5 day

10 day

10 day

 

Differences GFS-EC

 

Anl

1 day

3 day

5 day

10 day

 

Equator

 

Errors

 

ECMWF

GFS

1 day

1 day

3 day

3 day

5 day

5 day

10 day

10 day

 

Differences GFS-EC

 

Anl

1 day

3 day

5 day

10 day

 

850 hPa

 

Zonally Asymmetric

 

ECMWF

GFS

Analysis

Analysis

5 day

5 day

10 day

10 day

 

Errors

 

ECMWF

GFS

1 day

1 day

3 day

3 day

5 day

5 day

10 day

10 day

 

Differences GFS-EC

 

Anl

1 day

3 day

5 day

10 day

 

700 hPa

 

Zonally Asymmetric

 

ECMWF

GFS

Analysis

Analysis

5 day

5 day

10 day

10 day

 

Errors

 

ECMWF

GFS

1 day

1 day

3 day

3 day

5 day

5 day

10 day

10 day

 

Differences GFS-EC

 

Anl

1 day

3 day

5 day

10 day

 

Wind Magnitude

 

Zonal means

 

ECMWF

GFS

Anl

Anl

5 day

5 day

10 day

10 day

 

Errors

 

ECMWF

GFS

1 day

1 day

 

3 day

5 day

5 day

10 day

10 day

 

Differences in Time-Mean Wind Manitude GFS-EC

 

Anl

1 day

3 day

5 day

10 day

 

Time-Mean Difference In Wind Magnitude (RMS) GFS-EC

 

Anl

1 day

3 day

5 day

10 day

 

27.5-32.5N

 

Differences in Time-Mean Wind Manitude GFS-EC

 

Anl

1 day

3 day

5 day

10 day

 

Equator

 

Differences in Time-Mean Wind Manitude GFS-EC

 

Anl

1 day

3 day

5 day

10 day

 

45S

 

Differences in Time-Mean Wind Manitude GFS-EC

 

Anl

1 day

3 day

5 day

10 day

 

100 hPa

 

Differences in Time-Mean Wind Magnitude GFS-EC

 

Anl

1 day

3 day

5 day

10 day

 

Time-Mean Difference In Wind Magnitude (RMS) GFS-EC

 

Anl

1 day

3 day

5 day

 

1d-anl

5d-3d

 

250 hPa

 

Zonal Mean

 

Mean

Difference

Error

 

Time-Mean Wind Magnitude

 

ECMWF

GFS

Anl

Anl

10 day

10 day

 

Errors

 

ECMWF

GFS

1 day

1 day

3day

3 day

5 day

5 day

10 day

10 day

 

Differences in Time-Mean Wind Manitude GFS-EC

 

Anl

1 day

3 day

5 day

10 day

 

300 hPa

 

Time-Mean Difference In Wind Magnitude (RMS) GFS-EC

 

Anl

1 day

 

Transient Eddy Kinetic Energy

 

30-60N

20S-20N

30-60S

 

Zonal means

 

ECMWF

GFS

Anl

Anl

5 day

5 day

10 day

10 day

 

Errors

 

ECMWF

GFS

1 day

1 day

3 day

3 day

5 day

5 day

10 day

10 day

 

Differences GFS-EC

 

Anl

1 day

3 day

5 day

10 day

 

 

250 hPa

 

Time means

 

ECMWF

GFS

Anl

Anl

5 day

5 day

10 day

10 day

 

Errors

 

ECMWF

GFS

1 day

1 day

3 day

3 day

5 day

5 day

10 day

10 day

 

Differences GFS-EC

 

Anl

1 day

3 day

5 day

10 day

 

 

Meridional wind

 

Zonal means

 

ECMWF

GFS

Anl

Anl

1 day

1 day

3 day

3 day

5 day

5 day

10 day

10 day

 

Errors

 

ECMWF

GFS

1 day

1 day

3 day

3 day

5 day

5 day

10 day

10 day

 

Differences in Time-Mean Wind Manitude GFS-EC

 

Anl

1 day

3 day

5 day

10 day

 

15-30N

30S-5N

 

 

 

 

 

Relative Humidity

 

Zonal means

 

ECMWF

GFS

Anl

Anl

 

Differences in Time-Mean Wind Manitude GFS-EC

 

Anl

 

1000 hPa

ECMWF

GFS

GFS-ECMWF

 

950 hPa

ECMWF

GFS

GFS-ECMWF

 

900 hPa

ECMWF

GFS

GFS-ECMWF

 

850 hPa

ECMWF

GFS

GFS-ECMWF

 

800 hPa

ECMWF

GFS

GFS-ECMWF

 

700 hPa

ECMWF

GFS

GFS-ECMWF

 

300 hPa

ECMWF

GFS

GFS-ECMWF

 

200 hPa

ECMWF

GFS

GFS-ECMWF

 

100 hPa

ECMWF

GFS

GFS-ECMWF