A comparison of ECMWF fields to GFS fields

 

September 2003

 

500 hPa height

 

Zonal means

 

Analyses

 

RMS and SD Differences

 

Analyses

1 day forecasts

2 day forecasts

3 day forecasts

5 day forecasts

 

RMS Z500

 

Analyses

1 day forecasts

2 day forecasts

3 day forecasts

5 day forecasts

 

Error

 

Time-mean

1 day forecasts

2 day forecasts

3 day forecasts

5 day forecasts

RMS

1 day forecasts

2 day forecasts

3 day forecasts

5 day forecasts

SD

1 day forecasts

2 day forecasts

3 day forecasts

5 day forecasts

 

Regional

 

Monthly means

 

EC analyses

GFS analyses

 

Zonally asymmetric monthly means

 

EC

Analyses

1 day forecasts

2 day forecasts

3 day forecasts

5 day forecasts

GFS

Analyses

1 day forecasts

2 day forecasts

3 day forecasts

5 day forecasts

 

Differences EC-GFS

 

Time -mean

Analyses

1 day forecasts

2 day forecasts

3 day forecasts

5 day forecasts

RMS

Analyses

1 day forecasts

2 day forecasts

3 day forecasts

5 day forecasts

Normalized RMS

Analyses

1 day forecasts

2 day forecasts

3 day forecasts

5 day forecasts

Stan dev.

Analyses

1 day forecasts

2 day forecasts

3 day forecasts

5 day forecasts

 

Time-mean error in 500 hPa heights

 

EC

1 day

2 day

3 day

5 day

GFS

1 day

2 day

3 day

5 day

 

Difference in systematic error in 500 hPa heights EC-GFS

 

1 day

2 day

3 day

5 day

 

Rms 500 hPa heights

 

EC

Analyses

1 day

2 day

3 day

5 day

GFS

Analyses

1 day

2 day

3 day

5 day

 

Error in rms 500 hPa heights

 

EC

1 day

2 day

3 day

5 day

GFS

1 day

2 day

3 day

5 day

 

Difference in error in rms 500 hPa heights EC minus GFS

 

1 day

2 day

3 day

5 day

 

Difference in rms 500 hPa height EC-GFS

 

Analyses

1 day forecasts

2 day forecasts

3 day forecasts

5 day forecasts

 

RMS error in 500 hPa height

 

EC

1 day

2 day

3 day

5 day

GFS

1 day

2 day

3 day

5 day

EC-GFS

1 day

2 day

3 day

5 day

 

Stan. Dev. Error in 500 hPa height

 

EC

1 day

2 day

3 day

5 day

GFS

1 day

2 day

3 day

5 day

EC-GFS

1 day

2 day

3 day

5 day

 

Correlation of 500 hPa height in EC and GFS

 

Analyses

1 day forecasts

2 day forecasts

3 day forecasts

5 day forecasts

 

850 hPa Temperature Analyses

 

Zonal mean

Zonal mean RMS

 

 

Time-mean

EC

GFS

EC-GFS

Zonally asymmetric

EC

GFS

 

RMS

EC

GFS

EC-GFS

 

RMS difference

Normalized RMS difference

 

EC-GFS correlation

 

Wind Analyses

 

Zonal means

 

Zonal wind

850

200

Meridional wind

850

200

Transient eddy kinetic energy

850

200

Horizontal divergence

850

200

 

Zonal wind

 

850 eastern hemisphere

EC

GFS

EC-GFS

850 western hemisphere

EC

GFS

EC-GFS

200 eastern hemisphere

EC

GFS

EC-GFS

200 western hemisphere

EC

GFS

EC-GFS

 

Meridional wind

 

850 eastern hemisphere

EC

GFS

EC-GFS

850 western hemisphere

EC

GFS

EC-GFS

200 eastern hemisphere

EC

GFS

EC-GFS

200 western hemisphere

EC

GFS

EC-GFS

 

RMS Difference

 

850 hPa Zonal wind

Eastern hemisphere

Western hemisphere

850 hPa Meridional wind

Eastern hemisphere

Western hemisphere

200 hPa Zonal wind

Eastern hemisphere

Western hemisphere

200 hPa Meridional wind

Eastern hemisphere

Western hemisphere

 

Normalized RMS Difference

 

850 hPa Zonal wind

Eastern hemisphere

Western hemisphere

850 hPa Meridional wind

Eastern hemisphere

Western hemisphere

200 hPa Zonal wind

Eastern hemisphere

Western hemisphere

200 hPa Meridional wind

Eastern hemisphere

Western hemisphere

 

Correlation

 

850 hPa Zonal wind

Correlation eastern hemisphere

Correlation western hemisphere

850 hPa Meridional wind

Correlation eastern hemisphere

Correlation western hemisphere

200 hPa Zonal wind

Correlation eastern hemisphere

Correlation western hemisphere

200 hPa Meridional wind

Correlation eastern hemisphere

Correlation western hemisphere

 

Streamfunction

 

850 eastern hemisphere

EC

GFS

EC-GFS

850 western hemisphere

EC

GFS

EC-GFS

200 eastern hemisphere

EC

GFS

EC-GFS

200 western hemisphere

EC

GFS

EC-GFS

 

Transient eddy kinetic energy

 

850 eastern hemisphere

EC

GFS

EC-GFS

850 western hemisphere

EC

GFS

EC-GFS

200 eastern hemisphere

EC

GFS

EC-GFS

200 western hemisphere

EC

GFS

EC-GFS

 

Relative vorticity

 

850 eastern hemisphere

EC

GFS

EC-GFS

850 western hemisphere

EC

GFS

EC-GFS

200 eastern hemisphere

EC

GFS

EC-GFS

200 western hemisphere

EC

GFS

EC-GFS

 

Horizonal Divergence

 

850 eastern hemisphere

EC

GFS

EC-GFS

850 western hemisphere

EC

GFS

EC-GFS

200 eastern hemisphere

EC

GFS

EC-GFS

200 western hemisphere

EC

GFS

EC-GFS