National Centers for Environmental Prediction-Department of Energy (NCEP-DOE) Atmospheric Model Intercomparison Project (AMIP)-II Reanalysis (Reanalysis-2)

Published by NOAA National Centers for Environmental Information | National Oceanic and Atmospheric Administration, Department of Commerce | Catalog Last Checked: April 12, 2026 at 09:20 PM | Dataset Last Updated: November 01, 2002 at 12:00 AM

The NCEP-DOE Atmospheric Model Intercomparison Project (AMIP-II) reanalysis is a follow-on project to the "50-year" (1948-present) NCEP-NCAR Reanalysis Project. NCEP-DOE AMIP-II reanalysis covers the "20-year" satellite period of 1979 to the present and uses an updated forecast model, updated data assimilation system, improved diagnostic outputs, and fixes for the known processing problems of the NCEP-NCAR reanalysis. Only minor differences are found in the primary analysis variables such as free atmospheric geopotential height and winds in the Northern Hemisphere extratropics, while significant improvements upon NCEP-NCAR reanalysis are made in land surface parameters and land-ocean fluxes. This analysis can be used as a supplement to the NCEP-NCAR reanalysis especially where the original analysis has problems. The differences between the two analyses also provide a measure of uncertainty in current analyses. Atmospheric variables include temperature, humidity, wind speed, and geopotential height. Variables are available in several coordinate systems: pressure, Gaussian grid, spectral coefficients data, and as surface data. Temporal resolution is 6-hourly (4 time a day), and as daily and monthly averages.

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NCEI Dataset Landing Page

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NCEI Product Information Page

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NCEI Direct Download (6-Hourly Reanalysis)

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NCEI Direct Download (Monthly Means)

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NCEI Dataset Order (6-Hourly Reanalysis)

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NCEI Dataset Order (Monthly Means)

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Bulletin of the American Meteorological Society (BAMS)

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Global Change Master Directory (GCMD) Keywords

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NCEP/DOE AMIP-II Reanalysis (Reanalysis-2) Homepage

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NOAA National Centers for Environmental Information (NCEI)

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@type	dcat:Dataset
accessLevel	non-public
contactPoint	{ "fn": "NOAA National Centers for Environmental Information", "@type": "vcard:Contact", "hasEmail": "mailto:ncei.orders@noaa.gov" }
describedByType	application/octet-steam
description	The NCEP-DOE Atmospheric Model Intercomparison Project (AMIP-II) reanalysis is a follow-on project to the "50-year" (1948-present) NCEP-NCAR Reanalysis Project. NCEP-DOE AMIP-II reanalysis covers the "20-year" satellite period of 1979 to the present and uses an updated forecast model, updated data assimilation system, improved diagnostic outputs, and fixes for the known processing problems of the NCEP-NCAR reanalysis. Only minor differences are found in the primary analysis variables such as free atmospheric geopotential height and winds in the Northern Hemisphere extratropics, while significant improvements upon NCEP-NCAR reanalysis are made in land surface parameters and land-ocean fluxes. This analysis can be used as a supplement to the NCEP-NCAR reanalysis especially where the original analysis has problems. The differences between the two analyses also provide a measure of uncertainty in current analyses. Atmospheric variables include temperature, humidity, wind speed, and geopotential height. Variables are available in several coordinate systems: pressure, Gaussian grid, spectral coefficients data, and as surface data. Temporal resolution is 6-hourly (4 time a day), and as daily and monthly averages.
distribution	[ { "@type": "dcat:Distribution", "title": "NCEI Dataset Landing Page", "accessURL": "https://www.ncei.noaa.gov/metadata/geoportal/rest/metadata/item/gov.noaa.ncdc:C01311/html", "mediaType": "text/html", "description": "Landing page for the dataset.", "describedByType": "application/octet-stream" }, { "@type": "dcat:Distribution", "title": "NCEI Product Information Page", "accessURL": "https://www.ncei.noaa.gov/products/weather-climate-models/reanalysis-1-2", "mediaType": "text/html", "description": "Description of the data and related resources.", "describedByType": "application/octet-stream" }, { "@type": "dcat:Distribution", "title": "NCEI Direct Download (6-Hourly Reanalysis)", "accessURL": "https://www.ncei.noaa.gov/data/ncep-reanalysis2/access/6-hourly/6hr/", "mediaType": "text/html", "description": "Direct download for the dataset.", "describedByType": "application/octet-stream" }, { "@type": "dcat:Distribution", "title": "NCEI Direct Download (Monthly Means)", "accessURL": "https://www.ncei.noaa.gov/data/ncep-reanalysis2/access/monthly/", "mediaType": "text/html", "description": "Direct download for the dataset.", "describedByType": "application/octet-stream" }, { "@type": "dcat:Distribution", "title": "NCEI Dataset Order (6-Hourly Reanalysis)", "mediaType": "placeholder/value", "description": "Select and order files in the offline archive.", "downloadURL": "https://www.ncei.noaa.gov/has/HAS.FileAppRouter?datasetname=NCDOEGR2TS&subqueryby=STATION&applname=&outdest=FILE", "describedByType": "application/octet-stream" }, { "@type": "dcat:Distribution", "title": "NCEI Dataset Order (Monthly Means)", "mediaType": "placeholder/value", "description": "Select and order files in the offline archive.", "downloadURL": "https://www.ncei.noaa.gov/has/HAS.FileAppRouter?datasetname=NCDOEGR2MON&subqueryby=STATION&applname=&outdest=FILE", "describedByType": "application/octet-stream" }, { "@type": "dcat:Distribution", "title": "Bulletin of the American Meteorological Society (BAMS)", "accessURL": "https://doi.org/10.1175/BAMS-83-11-1631", "mediaType": "text/html", "description": "Portable Document Format", "describedByType": "application/octet-stream" }, { "@type": "dcat:Distribution", "title": "Global Change Master Directory (GCMD) Keywords", "accessURL": "https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords", "mediaType": "text/html", "description": "The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords.", "describedByType": "application/octet-stream" }, { "@type": "dcat:Distribution", "title": "NCEP/DOE AMIP-II Reanalysis (Reanalysis-2) Homepage", "accessURL": "http://www.cpc.ncep.noaa.gov/products/wesley/reanalysis2/", "mediaType": "text/html", "description": "Information on the NCEP/DOE AMIP-II Reanalysis (Reanalysis-2)", "describedByType": "application/octet-stream" }, { "@type": "dcat:Distribution", "title": "NOAA National Centers for Environmental Information (NCEI)", "accessURL": "https://www.ncei.noaa.gov", "mediaType": "text/html", "description": "NCEI home page with information, data access and contact information.", "describedByType": "application/octet-stream" } ]
identifier	https://data.noaa.gov/waf/NOAA/NESDIS/ncei/aim/iso/xml/C01311.xml
issued	2002-11-01T00:00:00.000+00:00
keyword	[ "Earth Science > Atmosphere > Altitude > Geopotential Height", "Earth Science > Atmosphere > Atmospheric Pressure > Pressure Thickness", "Earth Science > Atmosphere > Atmospheric Pressure > Sea Level Pressure", "Earth Science > Atmosphere > Atmospheric Pressure > Surface Pressure", "Earth Science > Atmosphere > Atmospheric Radiation > Heat Flux", "Earth Science > Atmosphere > Atmospheric Radiation > Incoming Solar Radiation", "Earth Science > Atmosphere > Atmospheric Radiation > Longwave Radiation", "Earth Science > Atmosphere > Atmospheric Radiation > Outgoing Longwave Radiation", "Earth Science > Atmosphere > Atmospheric Radiation > Radiative Flux", "Earth Science > Atmosphere > Atmospheric Radiation > Shortwave Radiation", "Earth Science > Atmosphere > Atmospheric Temperature > Surface Temperature > Air Temperature", "Earth Science > Atmosphere > Atmospheric Temperature > Boundary Layer Temperature", "Earth Science > Atmosphere > Atmospheric Temperature > Surface Temperature > Maximum/Minimum Temperature", "Earth Science > Atmosphere > Atmospheric Temperature > Upper Air Temperature", "Earth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor Indices > Humidity", "Earth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor Indicators > Total Precipitable Water", "Earth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor Indicators > Water Vapor Profiles", "Earth Science > Atmosphere > Atmospheric Winds > Surface Winds", "Earth Science > Atmosphere > Atmospheric Winds > Upper Level Winds", "Earth Science > Atmosphere > Atmospheric Winds > Wind Dynamics > Vertical Wind Velocity/Speed", "Earth Science > Atmosphere > Atmospheric Winds > Wind Dynamics > Vorticity", "Earth Science > Atmosphere > Atmospheric Winds > Wind Profiles", "Earth Science > Land Surface > Soils > Soil Moisture/Water Content", "Earth Science > Land Surface > Surface Thermal Properties > Land Surface Temperature", "Earth Science > Land Surface > Soils > Soil Temperature", "Geographic Region > Global", "Vertical Location > Troposphere", "Vertical Location > Land Surface", "Vertical Location > Sea Surface" ]
landingPage	http://www.cpc.ncep.noaa.gov/products/wesley/reanalysis2/
language	[]
license	https://creativecommons.org/publicdomain/zero/1.0/
modified	2002-11-01T00:00:00.000+00:00
publisher	{ "name": "NOAA National Centers for Environmental Information", "@type": "org:Organization" }
references	[ "https://doi.org/10.1175/BAMS-83-11-1631" ]
rights	otherRestrictions
spatial	180.0,-90.0,-180.0,90.0
temporal	1979-01-01T00:00:00+00:00/1979-01-01T00:00:00+00:00
title	National Centers for Environmental Prediction-Department of Energy (NCEP-DOE) Atmospheric Model Intercomparison Project (AMIP)-II Reanalysis (Reanalysis-2)

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