Geoscientific Model Development
Geoscientific Model Development
GMD
Articles | Volume 11, issue 3
Articles | Volume 11, issue 3
https://doi.org/10.5194/gmd-11-1093-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gmd-11-1093-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 11, issue 3
Development and technical paper
 | 
27 Mar 2018
Development and technical paper |  | 27 Mar 2018

Optimizing UV Index determination from broadband irradiances

Keith A. Tereszchuk, Yves J. Rochon, Chris A. McLinden, and Paul A. Vaillancourt

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Short summary
To reduce computational costs, ECCC's new method to calculate the UV Index involves scaling and weighting the irradiance contribution of four low-res UV broadbands currently produced by the GEM forecast model. A high-res irradiance spectrum was produced using Cloud-J to create simulated GEM broadbands to calibrate the original GEM broadbands. The scaled GEM broadbands are then weighted accordingly so that the resultant UV Index field emulates the high-res UV Index field calculated from Cloud-J.
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