Information on Atmospheric Reanalyses

Summary of the main atmospheric reanalyses that are current or underway, with the horizontal resolution (latitude: T159 is equivalent to about 0.8 degree), the starting and ending dates, the approximate vintage of the model and analysis system and current status

Reanalysis Horiz. Res. Dates Vintage Status
NCEP/NCAR R1 T62 1948-present 1995 ongoing
NCEP-DOE R2 T62 1979-present 2001 ongoing
CFSRR (NCEP) T382 1979-present 2009 in progress
C20r (NOAA) 2 degree 1891-2008 2009 in progress
ERA-40 T159 1957-2002 2004 complete
ERA-Interim T255 1989-present 2009 ongoing
JRA-25 T106 1979-present 2006 ongoing
JRA-55 T319 1958-2012 2009 underway
MERRA half degree 1979-present 2009 in progress

For more information, see:

  • Trenberth, K.E., R. Dole, Y. Xue, K. Onogi, D. Dee, M. Balmaseda, M. Bosilovich, S. Schubert, W. Large, 2010: Atmospheric reanalyses: A major resource for ocean product development and modeling. In Proc. "OceanObs'09: Sustained Ocean Observations and Information for Society" Conference (Vol. 2), Venice, Italy, 21-25 September 2009. J. Hall, D.E. Harrison and D. Stammer, Eds., ESA Publications WPP-306, in press. [pdf]