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TOVS-Derived Downwelling Surface Longwave Radiation in the Arctic 1979-2005


This data set contains downwelling flux of longwave radiation (DLF) measurements over the Arctic. These data were derived from TIROS-N Operational Vertical Sounder (TOVS) radiances of temperature profiles, humidity estimates, and cloud cover combined with brightness temperature differences from pairs of infrared and near-infrared TOVS channels used to infer cloud phase and geometric thickness. Data were gathered daily between 13 July 1979 through 31 December 2005.

Data access

Additional information

  • 1.0 (2012-05-02)
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Related projects
Spatial Type grid
Frequency daily
Language English
Grant Code 0611577 and 0240791
ISO Topic Categories
  • climatologyMeteorologyAtmosphere
Related links

Temporal coverage

Begin datetime 1979-07-13 12:00:00
End datetime 2005-12-31 12:00:00

Spatial coverage

Map data from IBCSO, IBCAO, and Global Topography.

Maximum (North) Latitude: 90.00, Minimum (South) Latitude: 70.00
Minimum (West) Longitude: -180.00, Maximum (East) Longitude: 180.00

Primary point of contact information

Robert Zahn <>

Additional contact information


Example citation following ESIP guidelines:

Francis, J. 2012. TOVS-Derived Downwelling Surface Longwave Radiation in the Arctic 1979-2005. Version 1.0. UCAR/NCAR - Earth Observing Laboratory. Accessed 14 Oct 2019.

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