Skip to main content
U.S. flag

An official website of the United States government

NOAA Climate Data Record (CDR) of Monthly Outgoing Longwave Radiation (OLR), Version 2.7 (Version Superseded)

Published by NOAA National Centers for Environmental Information | National Oceanic and Atmospheric Administration, Department of Commerce | Catalog Last Checked: September 09, 2026 at 10:21 PM | Dataset Last Updated: July 17, 2018 at 12:00 AM
*Note: This dataset version has been superseded by a newer version. It is highly recommended that users access the current version. Users should only use this version for special cases, such as reproducing studies that used this version.* This Climate Data Record (CDR) of monthly mean Outgoing Longwave Radiation (OLR) flux at the top of the atmosphere in all sky conditions is on a 2.5 degree x 2.5 degree grid with global coverage from January 1979 to June 2025. It is derived based on the multispectral High Resolution Infrared Radiation Sounder (HIRS) OLR algorithm and other methodologies. This dataset was created from HIRS OLR retrievals from TIROS-N to NOAA-19, and MetOp-A/B satellites with inter-satellite calibration adjustments and employed the empirical diurnal model for monthly mean derivation. This version 2.7 is an upgrade from the previous version 2.2-1. The main change is in the OLR regression models and the inter-satellite calibration. The version 2.7 OLR regression models improved the retrieval consistency between variant versions of HIRS instruments, HIRS-2, 2i, 3 and 4, and in turn, the accuracy of inter-satellite calibration is significantly improved, thus eliminating the spurious trends presented in the version 2.2-1 data. The data file format is netCDF-4 with CF metadata, and it is accompanied by algorithm documentation, data flow diagram and source code for the NOAA CDR Program.

Resources

8 resources available

Find Related Datasets

Search by Tags

Click any tag below to search for similar datasets

Earth Science > Atmosphere > Atmospheric Radiation > Outgoing Longwave Radiation TIROS-N > Television Infrared Observation Satellite - N NOAA-6 > National Oceanic & Atmospheric Administration - 6 NOAA-7 > National Oceanic & Atmospheric Administration - 7 NOAA-8 > National Oceanic & Atmospheric Administration - 8 NOAA-9 > National Oceanic & Atmospheric Administration - 9 NOAA-10 > National Oceanic & Atmospheric Administration - 10 NOAA-11 > National Oceanic & Atmospheric Administration - 11

Complete Metadata
@type dcat:Dataset
accessLevel non-public
contactPoint 
{
  "fn": "National Centers for Environmental Information",
  "@type": "vcard:Contact",
  "hasEmail": "mailto:monthly_olr_contacts@noaa.gov"
}
describedByType application/octet-stream
description *Note: This dataset version has been superseded by a newer version. It is highly recommended that users access the current version. Users should only use this version for special cases, such as reproducing studies that used this version.* This Climate Data Record (CDR) of monthly mean Outgoing Longwave Radiation (OLR) flux at the top of the atmosphere in all sky conditions is on a 2.5 degree x 2.5 degree grid with global coverage from January 1979 to June 2025. It is derived based on the multispectral High Resolution Infrared Radiation Sounder (HIRS) OLR algorithm and other methodologies. This dataset was created from HIRS OLR retrievals from TIROS-N to NOAA-19, and MetOp-A/B satellites with inter-satellite calibration adjustments and employed the empirical diurnal model for monthly mean derivation. This version 2.7 is an upgrade from the previous version 2.2-1. The main change is in the OLR regression models and the inter-satellite calibration. The version 2.7 OLR regression models improved the retrieval consistency between variant versions of HIRS instruments, HIRS-2, 2i, 3 and 4, and in turn, the accuracy of inter-satellite calibration is significantly improved, thus eliminating the spurious trends presented in the version 2.2-1 data. The data file format is netCDF-4 with CF metadata, and it is accompanied by algorithm documentation, data flow diagram and source code for the NOAA CDR Program.
distribution 
[
  {
    "@type": "dcat:Distribution",
    "title": "NCEI Dataset Landing Page",
    "accessURL": "https://doi.org/10.7289/V5W37TKD",
    "mediaType": "text/html",
    "description": "Landing page for the dataset.",
    "describedByType": "application/octet-stream"
  },
  {
    "@type": "dcat:Distribution",
    "title": "NOAA CDR page",
    "accessURL": "https://www.ncei.noaa.gov/products/climate-data-records/outgoing-longwave-radiation-monthly",
    "mediaType": "text/html",
    "description": "Access to the published CDR, source code, and documentation.",
    "describedByType": "application/octet-stream"
  },
  {
    "@type": "dcat:Distribution",
    "title": "Contact NCEI",
    "accessURL": "https://www.ncei.noaa.gov/contact",
    "mediaType": "text/html",
    "description": "Contact NCEI for more information and to request access to the archived data. Requests are subject to NCEI order fulfillment constraints.",
    "describedByType": "application/octet-stream"
  },
  {
    "@type": "dcat:Distribution",
    "title": "NCEI Dataset Landing Page for the Current Version",
    "accessURL": "https://doi.org/10.25921/edx3-v958",
    "mediaType": "text/html",
    "description": "Landing page for the Current Version.",
    "describedByType": "application/octet-stream"
  },
  {
    "@type": "dcat:Distribution",
    "title": "NCEI landing page for the superseded Version 2.2-1",
    "accessURL": "https://doi.org/10.7289/V5222RQP",
    "mediaType": "text/html",
    "description": "Superseded dataset landing page. This version should not be used as the primary research dataset. It may be appropriate to use for reproducing studies that used this earlier version.",
    "describedByType": "application/octet-stream"
  },
  {
    "@type": "dcat:Distribution",
    "title": "NCEI landing page for Outgoing Longwave Radiation - Daily",
    "accessURL": "https://doi.org/10.7289/V5SJ1HH2",
    "mediaType": "text/html",
    "description": "Related dataset landing page with general information and access links for that dataset.",
    "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": "CDR Program Contacts",
    "accessURL": "https://www.ncei.noaa.gov/products/climate-data-records",
    "mediaType": "text/html",
    "description": "Contact information for the CDR Program.",
    "describedByType": "application/octet-stream"
  }
]
identifier https://data.noaa.gov/waf/NOAA/NESDIS/ncei/aim/iso/xml/C01561.xml
issued 2018-07-17T00:00:00.000+00:00
keyword 
[
  "Earth Science > Atmosphere > Atmospheric Radiation > Outgoing Longwave Radiation",
  "TIROS-N > Television Infrared Observation Satellite - N",
  "NOAA-6 > National Oceanic & Atmospheric Administration - 6",
  "NOAA-7 > National Oceanic & Atmospheric Administration - 7",
  "NOAA-8 > National Oceanic & Atmospheric Administration - 8",
  "NOAA-9 > National Oceanic & Atmospheric Administration - 9",
  "NOAA-10 > National Oceanic & Atmospheric Administration - 10",
  "NOAA-11 > National Oceanic & Atmospheric Administration - 11",
  "NOAA-12 > National Oceanic & Atmospheric Administration - 12",
  "NOAA-14 > National Oceanic & Atmospheric Administration - 14",
  "NOAA-15 > National Oceanic & Atmospheric Administration - 15",
  "NOAA-16 > National Oceanic & Atmospheric Administration - 16",
  "NOAA-17 > National Oceanic & Atmospheric Administration - 17",
  "NOAA-18 > National Oceanic & Atmospheric Administration - 18",
  "NOAA-19 > National Oceanic & Atmospheric Administration - 19",
  "MetOp-A > Meteorological Operational Polar Satellite - A",
  "HIRS > High Resolution Infra-red Sounder",
  "HIRS-2 > High Resolution Infra-red Sounder/2",
  "HIRS-3 > High Resolution Infra-red Sounder/3",
  "HIRS-4 > High Resolution Infra-red Sounder/4",
  "Geographic Region > Global",
  "NOAA OneStop Project",
  "DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce",
  "DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce"
]
language 
[]
license https://creativecommons.org/publicdomain/zero/1.0/
modified 2018-07-17T00:00:00.000+00:00
publisher 
{
  "name": "NOAA National Centers for Environmental Information",
  "@type": "org:Organization"
}
references 
[
  "https://doi.org/10.25921/edx3-v958",
  "https://doi.org/10.7289/V5222RQP",
  "https://doi.org/10.7289/V5SJ1HH2"
]
rights otherRestrictions
spatial 180.0,-90.0,-180.0,90.0
temporal 1979-01-01T00:00:00+00:00/2025-06-01T00:00:00+00:00
theme 
[
  "geospatial"
]
title NOAA Climate Data Record (CDR) of Monthly Outgoing Longwave Radiation (OLR), Version 2.7 (Version Superseded)

data.gov

An official website of the GSA's Technology Transformation Services

Looking for U.S. government information and services?
Visit USA.gov