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Discussion papers
https://doi.org/10.5194/acp-2019-896
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-2019-896
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 07 Nov 2019

Submitted as: research article | 07 Nov 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Chemistry and Physics (ACP).

UV radiation measurements in Marambio, Antarctica during years 2017–2019 in a wider temporal and spatial context

Margit Aun1,2, Kaisa Lakkala1,3, Ricardo Sanchez4, Eija Asmi1,4, Fernando Nollas4, Outi Meinander1, Larisa Sogacheva1, Veerle De Bock5, Antti Arola1, Gerrit de Leeuw1, Veijo Aaltonen1, David Bolsee6, Klara Cizkova7, Alexander Mangold5, Ladislav Metelka7, Erko Jakobson2, Tove Svendby8, Didier Gillotay6, and Bert Van Opstal6 Margit Aun et al.
  • 1Finnish Meteorological Institute, Climate Research Programme
  • 2University of Tartu, Tartu Observatory, Estonia
  • 3Finnish Meteorological Institute, Space and Earth Observation Centre
  • 4Servicio Meteorológico Nacional, Argentina
  • 5Royal Meteorological Institute of Belgium
  • 6Royal Belgian Institute for Space Aeronomy
  • 7Czech Hydrometeorological Institute, Solar and Ozone Observatory
  • 8Norwegian Institute for Air Research

Abstract. In March 2017, ultraviolet (UV) radiation measurements with a multichannel GUV-2511 radiometer were started in Marambio, Antarctica (64.23º S; 56.62º W), by the Finnish Meteorological Institute (FMI) in collaboration with the Argentinian National Meteorological Service (SMN). These measurements were analysed and the results were compared to previous measurements at the same site with NILU-UV radiometer during 2000–2008 and to data from five stations across Antarctica. Measurements in Marambio showed lower UV radiation levels in 2017/2018 compared to those measured during 2000–2008. Also at several other stations in Antarctica the radiation levels were below average in that period. The maximum UV index (UVI) in Marambio was only 6.2, while, during the time period 2000–2008, the maximum was 12. In 2018/2019, the radiation levels were higher than in the previous year and the maximum UVI recorded in Marambio was 9.5. In Marambio, the largest variation of the UV radiation are during the spring and early summer when the stratospheric ozone concentration is at a minimum (the so-called ozone hole). Beside cloud cover, the strength of the polar vortex and the stratospheric ozone depletion are the primary factors that influence the surface UV radiation levels in Antarctica. As the recovery of the ozone layer is slow, the continuation of the measurements is crucial in order to be able to detect long-term changes in UV levels in Antarctica.

Margit Aun et al.
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Short summary
The paper reports on the new measurements of UV radiation in Marambio, Antarctica started in 2017 by Finnish Meteorological Institute in collaboration with the Argentinian National Meteorological Service (SMN). It addresses the variation in UV levels annually; the changes in UV radiation compared to 2000–2008 measurements from the same location and compares the results to other stations in Antarctica. The analysis show low UV levels in 2017/2018 compared to other years and not only in Marambio.
The paper reports on the new measurements of UV radiation in Marambio, Antarctica started in...
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