Ozone and Spectroradiometric UV Changes in the Past 20 Years over High Latitudes |
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| Authors: | K Eleftheratos S Kazadzis C S Zerefos K Tourpali C Meleti D Balis |
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| Institution: | 1. Faculty of Geology and Geoenvironment, University of Athens, Greece;2. Biomedical Research Foundation of the Academy of Athens, Athens, Greecekelef@geol.uoa.gr;4. Institute for Environmental Research and Sustainable Development, National Observatory of Athens, Greece;5. Biomedical Research Foundation of the Academy of Athens, Athens, Greece;6. Navarino Environmental Observatory (N.E.O.), Messinia, Greece;7. Department of Physics, Aristotle University of Thessaloniki, Greece |
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| Abstract: | AbstractThis study analyzes changes in solar ultraviolet (UV) irradiances at 305 and 325?nm at selected sites located at high latitudes of both hemispheres. Site selection was restricted to the availability of the most complete UV spectroradiometric datasets of the past twenty years (1990–2011). The results show that over northern high latitudes, between 55° and 70°N, UV irradiances at 305?nm decreased significantly by 3.9% per decade, whereas UV irradiance at 325?nm remained stable with no significant long-term change. Over southern high latitudes (55°–70°S), UV irradiances did not show any significant long-term changes at either 305 or 325?nm. Changes in solar UV irradiances are discussed in the context of long-term ozone and other atmospheric parameters affecting UV variability at ground level. |
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| Keywords: | ozone UV solar irradiances variability high latitudes |
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