Atmosphere
Atmospheric variables include temperature, precipitation, wind, pressure, clouds, greenhouse gases, and much more. Overview pages summarize and compare selected datasets of a given variable.
To find a specific dataset or variable, jump to the search box below or click your desired variable from among the blue sub-category buttons. Note that the classification of datasets by variable is approximate, especially for large, multi-variable datasets like reanalyses.
To see only the datasets accompanied by in-depth commentary, select the "Datasets with guidance" button when using the search box.
Sub-categories
Climate datasets

Years of record
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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…
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Timestep
- Sub-daily, Daily, Monthly
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Domain
- Global
Experts contributing reviews
- N/A

Years of record
- to
The CFSR is a third generation reanalysis product. It is a global, high resolution, coupled atmosphere-ocean-land surface-sea ice system designed to provide the best…
Main variables and Earth System components
Atmosphere Air Temperature Geopotential Height Precipitable water Ocean-
Formats
- GRIB
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Timestep
- Sub-daily, Monthly
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Domain
- Global
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Collections
- Climate Analysis Section (CAS) Data Catalog
Experts contributing reviews
- N/A

Years of record
- to
The Amundsen Sea Low (ASL) is a climatological low pressure center located over the extreme southern Pacific Ocean, off the coast of West Antarctica. Atmospheric…
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Timestep
- Monthly, Seasonal, Annual
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Collections
- N/A
Experts contributing reviews
- Hosking, Scott

Years of record
- to
The Modern Era Retrospective-Analysis for Research and Applications (MERRA) was undertaken by NASA’s Global Modeling and Assimilation Office with two primary objectives: to…
Main variables and Earth System components
Atmosphere Air Temperature Geopotential Height Precipitable water Water Vapor-
Timestep
- Sub-daily, Monthly
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Domain
- Global
Experts contributing reviews
- N/A

Years of record
- to
Data from rain gauge stations, satellites, and sounding observations have been merged to estimate monthly rainfall on a 2.5-degree global grid from 1979 to the present. The…
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Timestep
- Climatology, Monthly
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Domain
- Global
Experts contributing reviews
- Pendergrass, Angeline | Wang, Jian-Jian