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Volume 18, issue 21 | Copyright

Special issue: Quadrennial Ozone Symposium 2016 – Status and trends...

Atmos. Chem. Phys., 18, 16019-16031, 2018
https://doi.org/10.5194/acp-18-16019-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 08 Nov 2018

Research article | 08 Nov 2018

UV measurements at Marambio and Ushuaia during 2000–2010

Kaisa Lakkala1,2, Alberto Redondas3, Outi Meinander4, Laura Thölix4, Britta Hamari1, Antonio Fernando Almansa3, Virgilio Carreno3, Rosa Delia García5,3,6, Carlos Torres3, Guillermo Deferrari7,8, Hector Ochoa9, Germar Bernhard10, Ricardo Sanchez11, and Gerrit de Leeuw1 Kaisa Lakkala et al.
  • 1Finnish Meteorological Institute, Climate Research Programme, Kuopio, Finland
  • 2Finnish Meteorological Institute, Space and Earth Observation Centre, Sodankylä, Finland
  • 3Izaña Atmospheric Research Center, Agencia Estatal de Meteorología, Tenerife, Spain
  • 4Finnish Meteorological Institute, Climate Research Programme, Helsinki, Finland
  • 5Air Liquide España, Delegación Canarias, Candelaria, Spain
  • 6Atmospheric Optics Group, Valladolid University, Valladolid, Spain
  • 7Centro Austral de Investigaciones Cientificas (CADIC/CONICET), Ushuaia, Argentina
  • 8Universidad Nacional de Tierra del Fuego, Ushuaia, Argentina
  • 9Dirección Nacional del Antártico-Instituto Antártico Argentino, Buenos Aires, Argentina
  • 10Biospherical Instruments, Inc., San Diego, USA
  • 11Servicio Meteorológico Nacional, Buenos Aires, Argentina

Abstract. Solar ultraviolet (UV) irradiances were measured with NILU-UV multichannel radiometers at Ushuaia (54°S) and Marambio (64°S) between 2000 and 2013. The measurements were part of the Antarctic NILU-UV network, which was started in cooperation between Spain, Argentina and Finland. The erythemally weighted UV irradiance time series of both stations were analysed for the first time. The quality assurance procedures included a travelling reference instrument to transfer the irradiance scale to the stations. The time series were homogenized and high quality measurements were available for the period 2000–2010. During this period UV indices of 11 or more were measured on 5 and 35 days at Marambio and Ushuaia, respectively. At Marambio, the peak daily maximum UV index of 12 and daily doses of around 7kJm−2 were measured in November 2007. The highest UV daily doses at both stations were typically around 6kJm−2 and occurred when the stations were inside the polar vortex, resulting in very low total ozone amount. At both stations, daily doses in late November could even exceed those in the summer. At Marambio, in some years, also daily doses in October can be as high as those during the summer. At Ushuaia, the peak daily maximum UV index of 13 was measured twice: in November 2003 and 2009. Also during those days, the station of Ushuaia was inside the polar vortex.

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Solar UV irradiances were measured at Ushuaia (54° S) and Marambio (64° S) during 2000–2013. The measurements were part of the Antarctic NILU-UV network, which was maintained as a cooperation between Spain, Argentina and Finland. The time series of the network were analysed for the first time in this study. At both stations maximum UV indices and daily doses were measured when spring-time ozone loss episodes occurred. The maximum UV index was 13 and 12 in Ushuaia and Marambio, respectively.
Solar UV irradiances were measured at Ushuaia (54° S) and Marambio (64° S) during 2000–2013....
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