A Comparison of GFX Analyses and Forecasts to Other Centers

April 2007

Height

500 hPa

12 hour errors

GFS

GFX

1 day errors

GFS

GFX

Time-Mean Differences between Analyses

GFX-GFS

RMS

12 hour errors

GFS

GFX

1 day errors

GFS

EC

GFX

UK

FNOC

JMA

Difference in analyses

GFX-GFS	GFX-EC	GFX-UK	GFX-FNOC	GFX-JMA
	GFS-UK	EC-GFS	EC-UK

RMS Error

Zonal mean-12h

Zonal mean-1day

Zonal mean JMA-1day

40-60N-12 hours

40-60N-1day

40-60N JMA-1day

12hour

GFS

EC

GFX

UK

FNOC

Differences in 12 hour RMS errors

GFX-GFS

GFX-EC

GFX-UK

GFX-FNOC

1 day

GFS

EC

GFX

UK

FNOC

JMA

Differences in 1 day RMS errors

GFX-GFS

GFX-EC

GFX-UK

GFX-FNOC

GFX-JMA

RMS Difference-Analyses

Zonal mean

Zonal mean-JMA

Zonal mean-ocean

Zonal mean-JMA-ocean

40-50N

40-50N JMA

Regional

GFX-GFS				GFX-JMA
	GFS-UK	EC-GFS	EC-UK

Wind Magnitude

Zonal means

Analyses

GFS

EC

GFX

UK

FNOC

12 hour errors

GFS

EC

GFX

UK

FNOC

1 day errors

GFS

EC

GFX

UK

FNOC

Time-Mean Differences between Analyses

GFX-GFS	GFX-EC	GFX-UK	GFX-FNOC
GFS-UK	GFS-EC	EC-UK

Time-Mean Differences between 12 hour foregfssts

GFX-GFS	GFX-EC	GFX-UK	GFX-FNOC
GFS-UK	GFS-EC	EC-UK

Time-Mean Differences between 1-day foregfssts

GFX-GFS	GFX-EC	GFX-UK	GFX-FNOC
GFS-UK	GFS-EC	EC-UK

30-40N

Analyses

GFS

EC

GFX

UK

FNOC

12 hour errors

GFS

EC

GFX

UK

fnmoc

1 day errors

GFS

EC

GFX

UK

fnmoc

Time-Mean Differences between Analyses

GFX-GFS	GFX-EC	GFX-UK	GFX-FNOC
GFS-UK	GFS-EC	EC-UK

Time-Mean Differences between 12 hour foregfssts

GFX-GFS	GFX-EC	GFX-UK	GFX-FNOC
GFS-UK	GFS-EC	EC-UK

Time-Mean Differences between 1-day foregfssts

GFX-GFS	GFX-EC	GFX-UK	GFX-FNOC
GFS-UK	GFS-EC	EC-UK

Equator

Analyses

GFS

EC

GFX

UK

FNOC

12 hour errors

GFS

EC

GFX

UK

FNOC

1 day errors

GFS

EC

GFX

UK

FNOC

Time-Mean Differences between Analyses

GFX-GFS	GFX-EC	GFX-UK	GFX-FNOC
GFS-UK	GFS-EC	EC-UK

Time-Mean Differences between 12 hour foregfssts

GFX-GFS	GFX-EC	GFX-UK	GFX-FNOC
GFS-UK	GFS-EC	EC-UK

Time-Mean Differences between 1-day foregfssts

GFX-GFS	GFX-EC	GFX-UK	GFX-FNOC
GFS-UK	GFS-EC	EC-UK

200 hPa

30-40N

Analyses

GFS

EC

GFX

UK

FNOC

12 hour errors

GFS

EC

GFX

UK

FNOC

1 day errors

GFS

EC

GFX

UK

FNOC

Time-Mean Differences between Analyses

GFX-GFS	GFX-EC	GFX-UK	GFX-FNOC
GFS-UK	GFS-EC	EC-UK

Time-Mean Differences between 12 hour foregfssts

GFX-GFS	GFX-EC	GFX-UK	GFX-FNOC
GFS-UK	GFS-EC	EC-UK

Time-Mean Differences between 1-day foregfssts

GFX-GFS	GFX-EC	GFX-UK	GFX-FNOC
GFS-UK	GFS-EC	EC-UK

850 hPa

Analyses

GFS

EC

GFX

UK

FNOC

12 hour errors

GFS

EC

GFX

UK

FNOC

1 day errors

GFS

EC

GFX

UK

FNOC

Time-Mean Differences between Analyses

GFX-GFS	GFX-EC	GFX-UK	GFX-FNOC
GFS-UK	GFS-EC	EC-UK

Time-Mean Differences between 12 hour foregfssts

GFX-GFS	GFX-EC	GFX-UK	GFX-FNOC
GFS-UK	GFS-EC	EC-UK

Time-Mean Differences between 1-day foregfssts

GFX-GFS	GFX-EC	GFX-UK	GFX-FNOC
GFS-UK	GFS-EC	EC-UK

RMS Wind Error

Zonal means

12 hour errors

GFS

EC

GFX

UK

FNOC

200 hPa

850 hPa

1 day errors

GFS

EC

GFX

UK

FNOC

200 hPa

850 hPa

Time-Mean Differences between 12 hour foregfssts

GFX-GFS	GFX-EC	GFX-UK	GFX-FNOC
GFS-UK	GFS-EC	EC-UK

Time-Mean Differences between 1-day foregfssts

GFX-GFS	GFX-EC	GFX-UK	GFX-FNOC
GFS-UK	GFS-EC	EC-UK

20S-20N

12 hour errors

GFS

EC

GFX

UK

FNOC

1 day errors

GFS

EC

GFX

UK

FNOC

Time-Mean Differences between 12 hour foregfssts

GFX-GFS	GFX-EC	GFX-UK	GFX-FNOC
GFS-UK	GFS-EC

Time-Mean Differences between 1-day foregfssts

GFX-GFS	GFX-EC	GFX-UK	GFX-FNOC
GFS-UK	GFS-EC

200 hPa

12 hour errors

GFS

EC

GFX

UK

FNOC

1 day errors

GFS

EC

GFX

UK

FNOC

Time-Mean Differences between 12 hour foregfssts

GFX-GFS	GFX-EC	GFX-UK	GFX-FNOC
GFS-UK	GFS-EC	EC-UK

Time-Mean Differences between 1-day foregfssts

GFX-GFS	GFX-EC	GFX-UK	GFX-FNOC
GFS-UK	GFS-EC	EC-UK

850 hPa

12 hour errors

GFS

EC

GFX

UK

FNOC

1 day errors

GFS

EC

GFX

UK

FNOC

Time-Mean Differences between 12 hour foregfssts

GFX-GFS	GFX-EC	GFX-UK	GFX-FNOC
GFS-UK	GFS-EC	EC-UK

Time-Mean Differences between 1-day foregfssts

GFX-GFS	GFX-EC	GFX-UK	GFX-FNOC
GFS-UK	GFS-EC	EC-UK

Wind

Western Hemisphere

200

GFS anl	EC anl	GFX anl	MO anl	FNMOC anl
GFS 12hr	EC 12hr	GFX 12hr	MO 12hr	FNMOC 12hr
GFS 1dy	EC 1dy	GFX 1dy	MO 1dy	FNMOC 1dy
GFS 12hr error	EC 12hr error	GFX 12hr error	MO 12hr error	FNMOC 12hr error
GFS 1dy error	EC 1dy error	GFX 1dy error	MO 1dy error	FNMOC 1dy error
GFX-GFS anl	GFX-EC anl		GFX-MO anl	GFX-FNOC anl
GFX-GFS 12hr	GFX-EC 12hr		GFX-MO 12hr	GFX-FNOC 12hr
GFX-GFS 1dy	GFX-EC 1dy		GFX-MO 1dy	GFX-FNOC 1dy

500

GFS anl	EC anl	GFX anl	MO anl	FNMOC anl
GFS 12hr	EC 12hr	GFX 12hr	MO 12hr	FNMOC 12hr
GFS 1dy	EC 1dy	GFX 1dy	MO 1dy	FNMOC 1dy
GFS 12hr error	EC 12hr error	GFX 12hr error	MO 12hr error	FNOC 12hr error
GFS 1dy error	EC 1dy error	GFX 1dy error	MO 1dy error	FNOC 1dy error
GFX-GFS anl	GFX-EC anl		GFX-MO anl	GFX-FNOC anl
GFX-GFS 12hr	GFX-EC 12hr		GFX-MO 12hr	GFX-FNOC 12hr
GFX-GFS 1dy	GFX-EC 1dy		GFX-MO 1dy	GFX-FNOC 1dy

850

GFS anl	EC anl	GFX anl	MO anl	FNMOC anl
GFS 12hr	EC 12hr	GFX 12hr	MO 12hr	FNMOC 12hr
GFS 1dy	EC 1dy	GFX 1dy	MO 1dy	FNMOC 1dy
GFS 12hr error	EC 12hr error	GFX 12hr error	MO 12hr error	FNOC 12hr error
GFS 1dy error	EC 1dy error	GFX 1dy error	MO 1dy error	FNOC 1dy error
GFX-GFS anl	GFX-EC anl		GFX-MO anl	GFX-FNOC anl
GFX-GFS 12hr	GFX-EC 12hr		GFX-MO 12hr	GFX-FNOC 12hr
GFX-GFS 1dy	GFX-EC 1dy		GFX-MO 1dy	GFX-FNOC 1dy

Transient eddy kinetic energy

Zonal Mean

200 anl	200 12hr	200 1dy
850 anl	850 12hr	850 1dy

Zonal Mean 12 Hour Errors

GFS

EC

GFX

FNOC

MO

Zonal Mean 1-Day Errors

GFS

EC

GFX

FNOC

MO

Zonal Mean Differences

ANL	GFX-GFS	GFX-EC	GFX-FNOC	GFX-MO
12 hour	GFX-GFS	GFX-EC	GFX-FNOC	GFX-MO
1 day	GFX-GFS	GFX-EC	GFX-FNOC	GFX-MO

20S-20N Differences

ANL	GFX-GFS	GFX-EC	GFX-FNOC	GFX-MO
12 hour	GFX-GFS	GFX-EC	GFX-FNOC	GFX-MO
1 day	GFX-GFS	GFX-EC	GFX-FNOC	GFX-MO