Long‐term (1936–2003) ultraviolet and photosynthetically active radiation doses at a north Norwegian location in spring on the basis of total ozone and cloud cover

[1] We have reconstructed a homogeneous and consistent 68-year time series of ultraviolet (UVR) and photosynthetically active radiation (PAR) doses for the spring period at a marine location in northern Norway. The time series is simulated mainly on the basis of the Tromso total ozone series and routine meteorological observations of cloud cover. All other relevant input parameters were fixed at realistic values determined by local measurements and climatology. Our approach is applicable to a wide range of locations worldwide where routine ozone measurements and cloud observations are done. For the whole period 1936–2003, we find trends of +4.5%, +2.8% and +1.3% per decade for the monthly UVB doses in March, April and May, respectively. UVA and PAR doses, which are not affected by total ozone, reveal smaller trends (+1–2% per decade) in March and April, while the May trend is comparable to UVB. At shorter term, however, the radiation trends were very variable.

[1]  Jay R. Herman,et al.  Version 2 total ozone mapping spectrometer ultraviolet algorithm: problems and enhancements , 2002 .

[2]  Weine Josefsson,et al.  Long‐term variations of UV‐B doses at three stations in northern Europe , 2000 .

[3]  Arve Kylling,et al.  Determination of an effective spectral surface albedo from ground-based global and direct UV irradiance measurements , 2000 .

[4]  J. Randerson,et al.  Top‐down estimates of global CO sources using MOPITT measurements , 2004 .

[5]  A. Bais,et al.  Variability of UV‐B at four stations in Europe , 1997 .

[6]  R. Bojkov,et al.  Total ozone changes over Eurasia since 1973 based on reevaluated filter ozonometer data , 1994 .

[7]  Stanley C. Solomon,et al.  Stratospheric ozone depletion: A review of concepts and history , 1999 .

[8]  V. L. Orkin,et al.  Scientific Assessment of Ozone Depletion: 2010 , 2003 .

[9]  F. X. Kneizys,et al.  AFGL atmospheric constituent profiles (0-120km) , 1986 .

[10]  B. Diffey,et al.  Quantitative studies on UVA‐induced erythema in human skin , 1987, The British journal of dermatology.

[11]  E. Shettle Models of aerosols, clouds, and precipitation for atmospheric propagation studies , 1990 .

[12]  Didier Tanré,et al.  Second Simulation of the Satellite Signal in the Solar Spectrum, 6S: an overview , 1997, IEEE Trans. Geosci. Remote. Sens..

[13]  Antti Arola,et al.  Long-term erythemal UV doses at Sodankylä estimated using total ozone, sunshine duration, and snow depth , 2003 .