17 Oct 2023
 | 17 Oct 2023
Status: this preprint is currently under review for the journal AMT.

On the production and validation of satellite based UV index maps

Verena Schenzinger, Axel Kreuter, Barbara Klotz, Michael Schwarzmann, and Julian Gröbner

Abstract. This paper presents a method to calculate surface UV index maps from SEVIRI satellite images using a very simplified approach to account for clouds. We compare the resulting maps, which are produced near-real time operationally, to ground measurements from the Austrian UV network and affiliated stations. While the data agrees well for low altitude stations and in clear sky conditions, discrepancy at mountain stations and in certain cloud conditions between the map pixel and ground measurement UV indices gets higher. We discuss the sources of uncertainty in both values in detail, and highlight why a direct comparison of absolute UV index values for validating purposes is inadequate.

Verena Schenzinger et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on amt-2023-188', Anonymous Referee #1, 05 Nov 2023
  • RC2: 'Comment on amt-2023-188', Anonymous Referee #2, 07 Nov 2023

Verena Schenzinger et al.

Verena Schenzinger et al.


Total article views: 236 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
184 44 8 236 2 2
  • HTML: 184
  • PDF: 44
  • XML: 8
  • Total: 236
  • BibTeX: 2
  • EndNote: 2
Views and downloads (calculated since 17 Oct 2023)
Cumulative views and downloads (calculated since 17 Oct 2023)

Viewed (geographical distribution)

Total article views: 240 (including HTML, PDF, and XML) Thereof 240 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
Latest update: 06 Dec 2023
Short summary
We present a fast an easy method to incorporate clouds from satellite imagery into a model for calculating surface UV index maps in near-real time. To judge the quality of the model, we compare our results to measurements from ground based detectors. We discuss in detail where variations in either of the values come from and why satellite and ground values might not necessarily be comparable in every situation.