Reanalysis

Comprehensive weather and climate datasets, reanalyses assimilate a variety of observations of the atmosphere, land surface, and ocean into a forecast model to provide a dynamically consistent estimate of the climate state at each time step.

Below is the atmospheric reanalysis overview page, which summarizes the attributes of the major atmospheric reanalyses. This section also includes selected oceanic reanalyses, although an overview is not available yet.

To find a specific reanalysis, jump to the search box below or click your desired reanalysis from among the blue sub-category buttons.

To see only the reanalyses pages accompanied by in-depth commentary, select the "Datasets with guidance" button when using the search box.

Climate datasets

Has expert guidance
Climate Data Guide NCEP Reanalysis (R2)
  • Years of record

  • to

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…

Main variables and Earth System components

Atmosphere Air Temperature Geopotential Height Precipitable water
    • Timestep

    • Sub-daily, Daily, Monthly
    • Collections

    • None
  • Experts contributing reviews

  • None
NCEP-NCAR (R1): An Overview NCEP-NCAR (R1): An Overview
  • Years of record

  • to

NCEP-NCAR (R1) is the original reanalysis effort. It uses a frozen global state-of-the-art global data assimilation system (as of 11 January 1995). The original database was enhanced (additional, quality checked datasets) by NCAR's Data Support Section.…

Main variables and Earth System components

Atmosphere Air Temperature Geopotential Height
  • Experts contributing reviews

  • None