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Discussion papers
https://doi.org/10.5194/essd-2019-227
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/essd-2019-227
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: data description paper 03 Dec 2019

Submitted as: data description paper | 03 Dec 2019

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This discussion paper is a preprint. It is a manuscript under review for the journal Earth System Science Data (ESSD).

New continuous total ozone, UV, VIS and PAR measurements at Marambio 64° S, Antarctica

Kaisa Lakkala1,2, Margit Aun1,3, Ricardo Sanchez4, Germar Bernhard5, Eija Asmi1,4, Outi Meinander1, Fernando Nollas4, Gregor Hülsen6, Veijo Aaltonen1, Antti Arola1, and Gerrit de Leeuw1 Kaisa Lakkala et al.
  • 1Finnish Meteorological Institute, Climate Research Programme, Finland
  • 2Finnish Meteorological Institute, Space and Earth Observation Centre, Finland
  • 3University of Tartu, Estonia
  • 4Servicio Meteorológico Nacional, Argentina
  • 5Biospherical Instruments, Inc, USA
  • 6Physikalisch-Meteorologisches Observatorium Davos, World Radiation Center, Switzerland

Abstract. A GUV multifilter radiometer was set up at Marambio, 64° S 56° W, Antarctica, in 2017. The instrument measures continuously ultraviolet (UV) radiation, visible (VIS) radiation and photosynthetically active radiation (PAR). The measurements are designed for providing high quality long-term time series which can be used to assess the impact of global climate change in the Antarctic region. The quality assurance includes regular absolute calibrations and solar comparisons performed at the site and at Sodankylä, Finland. The actual measurements continue the time series measured at Marambio with NILU-UV radiometers during 2000–2010 as part of the Antarctic NILU-UV network. They are optimal for assessing the effects of the ongoing stratospheric ozone recovery on the ecosystem as the data products include information on radiation at various wavelengths ranging from UV to VIS so that changes on biologically effective radiation due to ozone can be separated from those due to other factors. The final data products are total ozone, PAR, VIS radiation at 555 nm, UV index, UV irradiance at 5 channels, UVB and UVA dose rate/daily dose, and biologically weighted UV dose rate/ daily dose, including 10 different action spectra. The data from the last five days and the daily maximum UV index time series are plotted and updated daily on the web page fmiarc.fmi.fi/sub_sites/GUVant/. The first two years of UV measurements were very different in terms of the results: The monthly average of daily maximum UVB dose rates were clearly higher in 2018 than in 2017 during the period from October to December. The largest difference was observed in October, when the average of daily maximum UVB dose rates was 7.6 kWm−2 and 10.2 kWm−2 in 2017 and 2018, respectively. The monthly averages were close to each other for all the three months in 2018, while in 2017 the monthly average of October was lower than those of November and December. VIS and PAR time series show that daily maxima in 2018–2019 exceed those in 2017–2018 during the late spring and the summer (mid-November–January). The studied dataset is freely accessible at https://doi.org/10.5281/zenodo.3553634 (Lakkala et al.,2019).

Kaisa Lakkala et al.
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Data sets

Datasets of UV irradiance, visible and photosynthetically active radiation in Marambio, Antarctica from March 2017 to May 2019 K. Lakkala, M. Aun, R. Sanchez, G. Bernhard, E. Asmi, O. Meinander, F. Nollas, G. Hülsen, V. Aaltonen, A. Arola, and G. De Leeuw https://doi.org/10.5281/zenodo.3553634

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Short summary
A GUV multifilter radiometer was set up at Marambio, 64° S 56° W, Antarctica, in 2017. The instrument measures continuously ultraviolet (UV) radiation, visible (VIS) radiation and photosynthetically active radiation (PAR). The measurements are designed for providing high quality long-term time series which can be used to assess the impact of global climate change in the Antarctic region. The data from the last five days are plotted and updated daily on the web page fmiarc.fmi.fi/sub_sites/GUVant/.
A GUV multifilter radiometer was set up at Marambio, 64° S 56° W, Antarctica, in 2017. The...
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