html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns="http://www.w3.org/TR/REC-html40"> xmlns:w="urn:schemas-microsoft-com:office:word" xmlns="http://www.w3.org/TR/REC-html40"> A Comparison of GFS Analyses and Forecasts to Other Centers

A Comparison of GFS Analyses and Forecasts to ECMWF

October 2011

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

925 hPa

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

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

50 hPa

Differences in Time-Mean Wind Magnitude GFS-EC

Anl

1 day

3 day

5 day

10 day

20 hPa

Differences in Time-Mean Wind Magnitude GFS-EC

Anl

1 day

3 day

5 day

10 day

10 hPa

Differences in Time-Mean Wind Magnitude GFS-EC

Anl

1 day

3 day

5 day

10 day

0

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

850 hPa

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

500 hPa

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

500 hPa

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

Anl

1 day

850 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 Zonal mean Meridional Wind GFS-EC

 

Anl

1 day

3 day

5 day

10 day

 

Area Means

 

5-25N

30S-eq

 

Standard Deviation of Vorticity

 

Zonal Mean

 

Analyses

EC

GFS

GFS-EC

 

 

1 day

EC

GFS

GFS-EC

EC error

GFS error

3 day

EC

GFS

GFS-EC

EC error

GFS error

5 day

EC

GFS

GFS-EC

EC error

GFS error

10 day

EC

GFS

GFS-EC

EC error

GFS error

 

20S-20N

 

Analyses

EC

GFS

GFS-EC

 

 

1 day

EC

GFS

GFS-EC

EC error

GFS error

3 day

EC

GFS

GFS-EC

EC error

GFS error

5 day

EC

GFS

GFS-EC

EC error

GFS error

10 day

EC

GFS

GFS-EC

EC error

GFS error

 

 

Horizontal Divergence

 

Analyses

 

Zonal mean

EC

GFS

GFS-EC

7.5N

EC

GFS

GFS-EC

7.5S

EC

GFS

GFS-EC

22.5N

EC

GFS

GFS-EC

150

EC

GFS

GFS-EC

200

EC

GFS

GFS-EC

925

EC

GFS

GFS-EC

1000

EC

GFS

GFS-EC

 

Relative Humidity

 

Zonal means

ECMWF

GFS

GFS-EC

Anl

Anl

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