Articles | Volume 11, issue 3
https://doi.org/10.5194/gmd-11-1093-2018
https://doi.org/10.5194/gmd-11-1093-2018
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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Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Svenja Lange on behalf of the Authors (05 Mar 2018)  Author's response
ED: Publish as is (20 Mar 2018) by Richard Neale
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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.