Atmospheric Measurement Techniques
Atmospheric Measurement Techniques
AMT
Articles | Volume 18, issue 21
Articles | Volume 18, issue 21
https://doi.org/10.5194/amt-18-5939-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-18-5939-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 18, issue 21
Research article
 | 
30 Oct 2025
Research article |  | 30 Oct 2025

The Component Summation Technique for Measuring Upwelling Longwave Irradiance in the Presence of an Obstruction

Bryan E. Fabbri, Gregory L. Schuster, Frederick M. Denn, Bing Lin, David A. Rutan, Wenying Su, Zachary A. Eitzen, James J. Madigan Jr., Robert F. Arduini, and Norman G. Loeb

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Short summary
We present a new upwelling longwave (LW) measurement technique that eliminates obstruction influences on pyrgeometers by using an infrared thermometer, downwelling LW pyrgeometer, and air temperature probe. This approach can be implemented at locations with obstruction challenges and verify existing upwelling LW pyrgeometer measurements. Satellite projects like the Clouds and the Earth's Radiant Energy System depend on accurate surface measurements to validate their models.
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