1. 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

2. ERA@ECMWF

3. ERA home

4. ERA archive document

5. ECMWF data server

6. ECMWF data server: ERA-Interim

7. ECMWF data FAQs

8. ERA@Reading

9. ERA permissions Register with the BADC Apply for permission to use ERA data Let me know when the above is completed Use the data on JASMIN

10. BADC home page

11. BADC dataset index

12. 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

13. ERA-Interim file types 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)

14. 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

15. 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

16. ERA-CLIM products

17. ERA-CLIM reanalysis products *netCDF ≈ 4xGRIB