ERA data
Paul Berrisford
Dick Dee, Paul Poli, Hans Hersbach, Carole Peubey,
David Tan, Patrick Laloyaux, Takuya Komori,
Rossana Dragani, Adrian Simmons
p.berrisford@reading.ac.uk
ERA@ECMWF
ERA home
ERA archive document
ECMWF data server
ECMWF data server: ERA-Interim
ECMWF data FAQs
ERA@Reading
ERA permissions
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Register with the BADC
Apply for permission to use ERA data
Let me know when the above is completed
Use the data on JASMIN
BADC home page
BADC dataset index
ERA data on JASMIN@Reading
• ERA-Interim and ERA-40 sub-sets
– 31 Tbytes and 9 Tbytes
• Convsh used to convert GRIB data to
– netCDF on full Gaussian grid
• Analyses and short forecasts (at surface)
• Non-model level data
– Model level analyses in GRIB are on HECTOR
• BADC receive the same ERA-Interim data
– BADC retrieved ERA-40 data independently
ERA-Interim file types
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ggap: pressure level analyses
ggat: potential temperature level analyses
ggav: potential vorticity level analyses
ggas: surface analyses
ggfs: surface forecasts
gafs: surface accumulated forecasts
gmfs: surface min/max forecasts
waas: wave analyses
ggis: surface invariants
ggaw: vertical integral analyses (monthly means only)
ERA-Interim period types
• “Daily” analyses: 00, 06, 12, 18
• Twice daily forecasts:
– step +3, +6, +9, +12 (at surface)
• Synoptic monthly means (hgap etc)
– fixed hour and step
• Monthly means of daily means
ERA-40
• ERA-40 similar (ish) to ERA-Interim
– Differences in MARS
– Differences in sub-setting
• Monthly means computed using cdo
• Fewer file types
• Additional diagnostics
– MMS, filtered transients, heating, climatologies
ERA-CLIM products
ERA-CLIM reanalysis products
ERA20CM
ERA-20C
Ensemble of model
integrations, using
HadISST2 and CMIP5
forcing
Ensemble of
reanalyses,
using surface
observations from
ICOADS and ISPD
37R3
Fixed dry mass
1900-2010
T159/L91
10 members
Monthly
means
+ twenty
3 hourly
pars
25 Tb
GRIB*
Complete
(Re-run
38R1
begun)
38R1
Stochastic
physics,
perturbed obs
1900-2010
T159/L91
10 members
3 hourly
700 Tb
GRIB*
Available
mid 2014
ERA20CL
Global land surface,
meteorological forcing
from ERA-20C
1900-2010
T799
10 members
3 hourly
77 Tb
GRIB*
Available
mid 2014
ERA-SAT
New reanalysis of the
satellite era
(to replace ERAInterim)
1979 onward
T511/L91 (?)
At least
3 hourly
234 Tb
GRIB*
Available
2015
*netCDF ≈ 4xGRIB