NCEP-DOE Reanalysis II (R2) is an improved version of the NCEP-NCAR Reanalysis I (R1). The improvements include an updated model with better physical parameterizations, assorted data assimilation errors were fixed and additional data were included. Still, it is still a 'first generation' product.
Key Strengths:
- Improved version of NCEP-NCAR (R1)
Key Limitations:
- Still a 1st generation reanalysis
- Low spatial and temporal moisture variability over oceans (mainly model 'first guess' fields)
- poor Southern Hemisphere
Technical Notes
Better than NCEP-NCAR (R1) but still a first generation reanalysis. It is best to use 3rd generation reanalyses, specifically, ERA-Interim and MERRA. The CFSR has not yet been analyzed by many researchers.
Years of Record
1978/12 to 2021/09
Timestep
Sub-daily | Daily | Monthly
Data Time Period Extended?
yes, data set is extended
Domain
Spatial Resolution
2.5°x2.5° 28 levels 3 hPA top
Ocean or Land
Ocean&Land
Missing Data Flag
spatially complete
Data Assimilation Method
Model Resolution used to create reanlaysis
T62 28 levels
Model Vintage (reanalysis)
2001
Input Data
Rawindsondes; ICOADS, station data, aircraft, satellite retrievals
Suggested Data Citation
NCEP_Reanalysis 2 data provided by the NOAA/OAR/ESRL PSD, Boulder, Colorado, USA, from their Web site at http://www.esrl.noaa.gov/psd/
Data Access: Please Cite data sources, following the data providers' instructions.
- Kanamitsu, M., & others, 2002: NCEP-DOE AMIP-II Reanalysis (R-2), Bull. Amer. Meteor. Soc., 83, 1631-1643.
- Roads, J., M. Kanamitsu, R. Stewart, 2002: CSE Water and Energy Budgets in the NCEP–DOE Reanalysis II. J. Hydrometeor, 3, 227–248.
- Amenu, Geremew G., Praveen Kumar, 2005: NVAP and Reanalysis-2 Global Precipitable Water Products : Intercomparison and Variability Studies. Bull. Amer. Meteor. Soc., 86, 245–256.
