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Long-term measurements of UV-A and UB-B solar radiation with an array-spectroradiometer (LOTUS)

For the LOTUS project long-term measurements of spectral resolved UV-B and UV-A irradiation (wavelength range of the instrument 280 to 400 nm) at the NDSC-Station in Ny-Ålesund will be carried out. For this purpose a multichannel UV spectroradiometer which was developed at AWI will be used. One of the important objectives of these UV measurement

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Project date

Starts
1996-01-01

Ends
2014-09-30

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Summary

For the LOTUS project long-term measurements of spectral resolved UV-B and UV-A irradiation (wavelength range of the instrument 280 to 400 nm) at the NDSC-Station in Ny-Ålesund will be carried out. For this purpose a multichannel UV spectroradiometer which was developed at AWI will be used. One of the important objectives of these UV measurements is the observation of long-term trends in UV-irradiance. The Arctic belongs to the most interesting geographical areas for such studies due to the strong ozone depletion events observed in this region. A direct effect of ozone depletion is the increasing UV-B radiation reaching the Earth’s surface. However, the scattering of UV-B radiation by aerosols and clouds plays also an important and complex role. A change in UV climate may possibly be detrimental to the biosphere, e.g. to marine life in the upper layers of the Sea or to terrestrial vegetation. Analysis and interpretation of the obtained data will be supported by measurements of other NDSC instruments which are operated at Ny-Ålesund. A full acceptance of the UV-spectroradiometer as NDSC instrument is anticipated after participation in an international intercomparison campaign.

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