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History of modifications
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The HIRS OLR product is based on the data acquired by the High Resolution Infrared Radiation Sounder (HIRS) instruments (Figure 1) measuring radiances in the infrared (IR).
Figure 1: HIRS instrument (left) and NOAA logo (right)
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Table 1: Description of the HIRS instrument type and level-1b data set coverage available for the HIRS OLR CDR production (from [D1]).
The Outgoing Longwave Radiation (OLR) is the total amount of energy emitted by the Earth and escaping toward the space. This quantity, expressed in W/m², is also called the “longwave flux” or the “thermal flux”. Together with the incoming solar radiation and the reflected solar radiation, it is a component of the Top-of-the-Atmosphere (TOA) Earth Radiation Budget (ERB).
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Variables in monthly mean | olr |
long_name | NOAA Climate Data Record of Monthly Mean Upward Longwave Flux at Top of the Atmosphere |
standard_name | toa_outgoing_longwave_flux |
units | W m-2 |
Figure 2: Illustration of the monthly mean HIRS OLR v02r07 (unit is W/m²).
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- The official website for user documentation and data access at NOAA/NCEI: https://www.ncdc.noaa.gov/cdr/atmospheric/outgoing-longwave-radiation-monthly
- The HIRS OLR portal at University of Maryland (UMD) at: http://olr.umd.edu/
Figure 3: Copernicus CDS Search (https://cds.climate.copernicus.eu/cdsapp#!/search)
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