First southern hemisphere intercomparison of measured solar UV spectra

摘要: Three UV spectroradiometers from the National Institute of Water and Atmospheric Research (NIWA) New Zealand, Fraunhofer (IFU) Germany, Australian Radiation Laboratory (ARL) Australia were intercompared at Lauder NZ on 23 February 1993. Over spectral range 290–400 nm, agreement between IFU NIWA instruments was better than 5%. At noon this day, irradiances measured by all three agreed within ±10%, except wavelengths shorter 300 where ARL instrument gave higher readings. larger solar zenith angles (SZA) differences short more pronounced, above nm measurements systematically lower. The reasons for these are discussed. Having established sets instrumentation, spectra maximum clear sky observed groups in Australia, Europe compared. erythemally weighted irradiance Melbourne highest (0.35 W m−2). Respective maxima Neuherberg Germany 85% 66% that Australia. Differences DNA-weighted UV.