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NOAA Climate Data Record (CDR) of Daily Outgoing Longwave Radiation (OLR), Version 2.0

This Climate Data Record (CDR) contains the daily mean Outgoing Longwave Radiation (OLR) time series in global 1 degree x 1 degree equal-angle gridded maps spanning from January 1, 1979 to present, and continuing daily with a two-day lag. The OLR is estimated from radiance observations from the operational polar-orbiting sounding instruments, including HIRS, IASI and CrIS, via multispectral OLR algorithm for HIRS, and spectral flux estimation algorithms for the hyper-spectral instruments, along with other temporal and spatial averaging methodologies. These OLR CDR products are generated with HIRS/IASI/CrIS OLR retrievals from TIROS-N series satellites, MetOp series satellites, and JPSS series satellites. The OLR retrievals are inter-satellite calibrated and maintain radiometric traceability, while using geostationary-estimated OLR to accurately account for diurnal variations for Daily mean product derivation. The new HIRS OLR regression coefficients improve the retrieval consistency between HIRS-based OLR retrievals and IASI/CrIS-based OLR retrievals. 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.

About this Dataset

Updated: 2025-11-20
Metadata Last Updated: 2025-11-20T02:57:00.851Z
Date Created: N/A
Data Provided by:
Dataset Owner: N/A

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Title NOAA Climate Data Record (CDR) of Daily Outgoing Longwave Radiation (OLR), Version 2.0
Description This Climate Data Record (CDR) contains the daily mean Outgoing Longwave Radiation (OLR) time series in global 1 degree x 1 degree equal-angle gridded maps spanning from January 1, 1979 to present, and continuing daily with a two-day lag. The OLR is estimated from radiance observations from the operational polar-orbiting sounding instruments, including HIRS, IASI and CrIS, via multispectral OLR algorithm for HIRS, and spectral flux estimation algorithms for the hyper-spectral instruments, along with other temporal and spatial averaging methodologies. These OLR CDR products are generated with HIRS/IASI/CrIS OLR retrievals from TIROS-N series satellites, MetOp series satellites, and JPSS series satellites. The OLR retrievals are inter-satellite calibrated and maintain radiometric traceability, while using geostationary-estimated OLR to accurately account for diurnal variations for Daily mean product derivation. The new HIRS OLR regression coefficients improve the retrieval consistency between HIRS-based OLR retrievals and IASI/CrIS-based OLR retrievals. 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.
Modified 2025-11-20T02:57:00.851Z
Publisher Name N/A
Contact N/A
Keywords Earth Science > Atmosphere > Atmospheric Radiation > Outgoing Longwave Radiation , Geographic Region > Global Land , NOAA OneStop Project , HIRS-2 > High Resolution Infra-red Sounder/2 , HIRS-3 > High Resolution Infra-red Sounder/3 , HIRS-4 > High Resolution Infra-red Sounder/4 , IASI > Infrared Atmospheric Sounding Interferometer , CrIS > Cross-track Infrared Sounder , 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 , NOAA-20 > Joint Polar Satellite System - 1 , NOAA-21 > Joint Polar Satellite System - 2 , MetOp-A > Meteorological Operational Polar Satellite - A , MetOp-B > Meteorological Operational Polar Satellite - B , MetOp-C > Meteorological Operational Polar Satellite - C , Suomi-NPP > Suomi National Polar-orbiting Partnership , DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce , climatologyMeteorologyAtmosphere
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