The NCEP-DOE Reanalysis 2 project is using a state-of-the-art analysis/forecast system to perform data assimilation using past data from 1979 through near present. Data is output on 17 pressure levels and on single level grids. Data is output 4x daily and is also available as daily and monthly. Climatologies are provided for select variables.

Data is from NCEP initialized reanalysis (4x/day). It consists of most variables interpolated to pressure surfaces from model (sigma) surfaces.

Data is from NCEP initialized analysis (2x/day). It consists of most variables interpolated to pressure surfaces from model (sigma) surfaces.

The GODAS dataset is a real-time ocean analysis and a reanalysis. It is used for monitoring, retrospective analysis as well as for providing oceanic initial conditions for the CFS. Both temperature and synthetic salinity profiles are assimilated in a 3DVAR scheme designed by Derber and Rosati (1989). 40 vertical levels are in the model together with 1x1 data values (enhanced in resolution to 1/3x1/3 degrees latitude within 10 degrees of the equator). The data is provided at 1/3x1/3 degrees for all latitudes.

The NARR dataset is an extension of the NCEP Global Reanalysis which is run over the North American Region. The NARR model uses the very high
resolution NCEP Eta Model (32km/45 layer) together with the Regional Data Assimilation System (RDAS) which, significantly, assimilates precipitation
along with other variables. Data is output 4-8 times daily. Daily and Monthly values are available. The datasets starts in 1979.

The 20th Century Reanalysis version 2 (20CRV2) is an effort led by PSL and the CIRES at the University of Colorado to produce a reanalysis dataset
spanning the entire twentieth century, assimilating only surface observations of synoptic pressure, monthly sea surface temperature and sea ice
distribution. V1 was initially completed as a test from 1950-1958. V2 covers the period from 1871-2012 . The model used is a 2008 experimental,

The 20th Century Reanalysis version 2c (20CRV2c)is an effort led by PSL and the CIRES at the University of Colorado to produce a reanalysis dataset
spanning the entire twentieth century, assimilating only surface observations of synoptic pressure, monthly sea surface temperature and sea
ice distribution. V1 was initially completed as a test from 1950-1958. V2 covers the period from 1871-2012 . The model used is a 2008 experimental,

<unknown>

The NOAA 1/4° daily Optimum Interpolation Sea Surface Temperature (or daily OISST) is an analysis constructed by combining observations from
different platforms (satellites, ships, buoys) on a regular global grid. A spatially complete SST map is produced by interpolating to fill in gaps.
Data starts in 1981 and is updated to near present.

Data is from NCEP It consists of OLR uninterpolated from 2x/day