20CRv3

NOAA-CIRES-DOE 20th Century Reanalysis V3

The 20CRv3 reanalysis uses a data assimilation system and surface pressure observations to generate a four-dimensional global atmospheric dataset of weather spanning 1836 to 2015.

Only surface observations of synoptic pressure is assimilated into the NOAA’s Global Forecast System,sea surface temperature and sea ice distribution are prescribed.  Temperature, pressure, winds, moisture, solar radiation and clouds, are estimated from the surface to the top of the atmosphere.

The temporal resolution of the main output is 3 hourly, however the data is also available as daily and monthly means.

The global grid used has a 75 km resolution.

More information is available from the PSL 20 Century reanalysis project  and the  NERSC data portal. The subdaily and member daily data was downloaded from the  NERSC data portal, all the other data from the PSL data portal.

The two portal published the data differently so there are inconsistencies in the way it is stored and named.

20CRV3 at NCI

The data is stored in

/g/data/ua8/LE_models/20CRv3/<frequency>/<variable>/<yr>

Available variables are:

subdaily: TMP2m, HGT500, PRMSL, PRATE

member_daily: PRMSL

mean_3hr: HGT_pres,  RH_2m,  SPFH_pres,  TMP_sfc, UGRD_pres, ICEC_sfc,  SOILW_depth,  TMP_2m,  TSOIL_depth,  VGRD_10m, PRES_sfc,  SPFH_2m, TMP_pres, UGRD_10m, VGRD_pres

mean_daily: prate, prmsl, tmax_2m, tmin_2m

/g/data/ua8/LE_models/20CRv3/derived. contains some fiedls derived by Zak Bailie.

HGT500 - daily mean derived from HGT500 sub-daily data

TxTn - daily maximum of 2m air temperature, derived from TMP2m sub-daily data

Ackowledgement and references

Papers using the Twentieth Century Reanalysis Project datasets are requested to include the following text in their acknowledgments: "Support for the Twentieth Century Reanalysis Project dataset is provided by the U.S. Department of Energy, Office of Science Biological and Environmental Research (BER) program, by the National Oceanic and Atmospheric Administration Climate Program Office, and by the NOAA Physical Sciences Laboratory."

If you are using the data provided by Zak Bailie please ackowledge him.

References

Compo, G.P., J.S. Whitaker, P.D. Sardeshmukh, N. Matsui, R.J. Allan, X. Yin, B.E. Gleason, R.S. Vose, G. Rutledge, P. Bessemoulin, S. Brönnimann, M. Brunet, R.I. Crouthamel, A.N. Grant, P.Y. Groisman, P.D. Jones, M. Kruk, A.C. Kruger, G.J. Marshall, M. Maugeri, H.Y. Mok, Ø. Nordli, T.F. Ross, R.M. Trigo, X.L. Wang, S.D. Woodruff, and S.J. Worley, 2011: The Twentieth Century Reanalysis Project. Quarterly J. Roy. Meteorol. Soc., 137, 1-28. DOI: 10.1002/qj.776.

Slivinski, L.C., G. P. Compo, J. S. Whitaker, P. D. Sardeshmukh, B. S. Giese, C. McColl, R. Allan, X. Yin, R. Vose, H. Titchner, J. Kennedy, L. J. Spencer, L. Ashcroft, S. Brönnimann, M. Brunet, D. Camuffo, R. Cornes, T. A. Cram, R. Crouthamel, F. Domínguez-Castro, J. E. Freeman, J. Gergis, E. Hawkins, P. D. Jones, S. Jourdain, A. Kaplan, H. Kubota, F. Le Blancq, T.-C. Lee, A. Lorrey, J. Luterbacher, M. Maugeri, C. J. Mock, G.W. K. Moore, R. Przybylak, C. Pudmenzky, C. Reason, V. C. Slonosky, C. A. Smith, B. Tinz, B. Trewin, M. A. Valente, X. L. Wang, C. Wilkinson, K. Wood, and P. Wyszyński, 2019: Towards a more reliable historical reanalysis: Improvements for version 3 of the Twentieth Century Reanalysis system. Quarterly J. Roy. Meteorol. Soc., in press. DOI: 10.1002/qj.3598.