Climate Dynamics

, Volume 37, Issue 11–12, pp 2541–2550 | Cite as

Assessing the performance of the CFSR by an ensemble of analyses

  • Wesley EbisuzakiEmail author
  • Li Zhang


The Climate Forecast System Reanalysis (CFSR, Saha et al. in Bull Am Meteor Soc 91:1015–1057, 2010) is the latest global reanalysis from the National Centers of Environmental Prediction (NCEP). In this study, we compare the CFSR tropospheric analyses to two ensembles of analyses. The first ensemble consists of 12 h analyses from various operational analyses for the year 2007. This ensemble shows how well the CFSR analyses can capture the daily variability. The second ensemble consists of monthly means from the available reanalyses from the years 1979 to 2009 which is used to examine the trends. With the 2007 ensemble, we find that the CFSR captures the daily variability in 2007 better than the older reanalyses and is comparable to the operational analyses. With the ensemble of monthly means, the CFSR is often the outlier. The CFSR shows a strong warming trend in the tropics which is not seen in the observations or other reanalyses.


CFSR CFSRR Reanalysis Ensemble 



Craig Long supplied the sonde data for Singapore and Accension Island. Suru Saha and the rest of the CFSR team for creating and supplying the data for the CFSR. Emily Becker downloaded much of the JRA-25 and MERRA data. Bhaskar Jha for supplying the CFSR-AMIP simulations and the reviewers for their comments which improved this paper.


  1. Bosilovich MG (2008) NASA’s modern era retrospective-analysis for research and applications: integrating earth observations. Accessed 2 June 2010
  2. Chelliah M, Ebisuzaki W, Weaver S, Kumar A (2011) Evaluating the tropospheric analyses from NCEP’s climate forecast system reanalysis (submitted)Google Scholar
  3. Daley R (1991) Atmospheric data analysis. Cambridge University Press, Cambridge, pp 98–101Google Scholar
  4. Ebisuzaki W, Worley S, Shih CF (2007) The NCEP-NCAR 2007 annual analyses DVD. Available from the National Center for Atmospheric Research (NCAR), Boulder COGoogle Scholar
  5. Kalnay E, Kanamitsu M, Kistler R, Collins W, Deaven D, Gandin L, Iredell M, Saha S, White G, Woollen J, Zhu Y, Chelliah M, Ebisuzaki W, Higgins W, Janowiak J, Mo KC, Ropelewski C, Wang J, Leetmaa A, Reynolds R, Jenne R, Joseph D (1996) The NMC/NCAR 40-year reanalysis project. Bull Am Meteor Soc 77:437–471CrossRefGoogle Scholar
  6. Kanamitsu M, Ebisuzaki W, Woollen J, Yang S-K, Hnilo JJ, Fiorino M, Potter GL (2002) NCEP-DOE AMIP-II reanalysis (R-2). Bull Am Meteor Soc 83:1631–1643CrossRefGoogle Scholar
  7. Onogi K, Tsutsui J, Koide H, Sakamoto M, Kobayashi S, Hatsushika H, Matsumoto T, Yamazaki N, Kamahori H, Takahashi K, Kadokura S, Wada K, Kato K, Oyama R, Ose T, Mannoji N, Taira R (2007) The JRA-25 reanalysis. J Met Soc Jap 85(3):369–432CrossRefGoogle Scholar
  8. Rienecker MM, Suarez MJ, Todling R, Bacmeister J, Takacs L, Liu H-C, Gu W, Sienkiewicz M, Koster RD, Gelaro R, Stajner I (2007) The GEOS-5 Data Assimilation System—Documentation of Versions 5.0.1 and 5.1.0. NASA GSFC Technical Report Series on Global Modeling and Data Assimilation, NASA/TM-2007-104606, vol 27, pp 92Google Scholar
  9. Saha S, Moorthi S, Pan HL, Wu X, Wang J, Nadiga S, Tripp P, Kistler R, Woolen J, Behringer D, Liu H, Stokes D, Grumbine R, Gayno G, Wang J, Hou YT, Chuang H, Juang HMJ, Sela J, Irdell M, Treadon R, Klesits D, Felst PV, Keyser D, Derber J, Ek M, Meng J, Wei H, Yang R, Lord S, van den Dool H, Kumar A, Wang W, Long C, Chelliah M, Xue Y, Huang B, Schemm J, Ebisuzaki W, Lin R, Xie PP, Chen M, Zhou S, Higgins W, Zou CZ, Liu Q, Chen Y, Han Y, Cucurull L, Reynolds RW, Rutledge G, Goldberg M (2010) The NCEP climate forecast system reanalysis. Bull Am Meteor Soc 91:1015–1057CrossRefGoogle Scholar
  10. Uppala SM, Kållberg PW, Simmons AJ, Andrae U, da Costa Bechtold V, Fiorino M, Gibson JK, Haseler J, Hernandez A, Kelly GA, Li X, Onogi K, Saarinen S, Sokka N, Allan RP, Andersson E, Arpe K, Balmaseda MA, Beljaars ACM, van de Berg L, Bidlot J, Bormann N, Caires S, Chevallier F, Dethof A, Dragosavac M, Fisher M, Fuentes M, Hagemann S, Hólm E, Hoskins BJ, Isaksen L, Janssen PAEM, Jenne R, McNally AP, Mahfouf J-F, Morcrette J-J, Rayner NA, Saunders RW, Simon P, Sterl A, Trenberth KE, Untch A, Vasiljevic D, Viterbo P, Woollen J (2005) The ERA-40 re-analysis. Quart J R Meteorol Soc 131:2961–3012CrossRefGoogle Scholar
  11. Xue Y, Huang B, Hu Z-Z, Kumar A, Wen C, Behringer D, Nadiga S (2010) An assessment of oceanic variability in the NCEP climate system reanalysis. Clim Dyn. doi:  10.1007/s00382-010-0954-4
  12. Yang F (2010) 2009 Review of GFS forecast skill. Accessed 20 Oct 2010

Copyright information

© Springer-Verlag (outside the USA) 2011

Authors and Affiliations

  1. 1.Climate Prediction Center, NCEP/NWS/NOAACamp SpringsUSA
  2. 2.Climate Prediction Center, NCEP/NWS/NOAACamp SpringsUSA
  3. 3.Wyle Information SystemsMcLeanUSA

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