In search of traceability: two decades of calibrated Brewer UV measurements in Sodankylä and Jokioinen

Heikkilä, Anu; Sakari Mäkelä, Jakke; Lakkala, Kaisa; Meinander, Outi; Kaurola, Jussi; Koskela, Tapani; Karhu, Juha Matti; Karppinen, Tomi; Kyrö, Esko; de Leeuw, Gerrit

doi:https://doi.org/10.5194/gi-5-531-2016

Articles | Volume 5, issue 2

https://doi.org/10.5194/gi-5-531-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue:

Multi-disciplinary research and integrated monitoring at the...

https://doi.org/10.5194/gi-5-531-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 5, issue 2

Research article

|

22 Nov 2016

Research article |

| 22 Nov 2016

In search of traceability: two decades of calibrated Brewer UV measurements in Sodankylä and Jokioinen

Anu Heikkilä, Jakke Sakari Mäkelä, Kaisa Lakkala, Outi Meinander, Jussi Kaurola, Tapani Koskela, Juha Matti Karhu, Tomi Karppinen, Esko Kyrö, and Gerrit de Leeuw

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Final revised paper (published on 22 Nov 2016)
Preprint (discussion started on 18 Jan 2016)
Companion paper

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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RC1: 'reviewer comments', Anonymous Referee #1, 07 Feb 2016
- AC1: 'Authors' response to the Interactive Comment from Referee #1', A. Heikkilä, 22 Jul 2016
SC1: 'Review: In search of traceability...', Tom McElroy, 29 Feb 2016
- AC2: 'Authors' response to the Interactive Comment from Referee #2', A. Heikkilä, 22 Jul 2016
EC1: 'Authors' response requested', Noora Partamies, 22 Mar 2016
- AC3: 'Authors' response to the Editor's Comment', A. Heikkilä, 22 Jul 2016

Short summary

Lamp measurements used for the UV irradiance calibration of two Brewer spectrophotometers operated for 20 years in Jokioinen and Sodankylä, Finland, were examined. Temporal development of the responsivity after fixing the irradiance measurements into a specific scale was studied. Both long-term gradual decrease and abrupt changes in responsiveness were detected. Frequent-enough measurements of working standard lamps were found necessary to detect the short-term variations in responsiveness.