P. Koepke - Academia.edu (original) (raw)

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Papers by P. Koepke

Research paper thumbnail of Long term changes and climatology of UV radiation over Europe

Research paper thumbnail of Comparison of models used for UV index calculations

Photochemistry and …, Jan 1, 1998

Research paper thumbnail of An overview of the results from the comparison of UV-Index forecasted and measured at all atmospheric conditions including clouds

Research paper thumbnail of Routine measurement of erythemally effective UV irradiance on inclined surfaces

Journal of Photochemistry and Photobiology B: Biology, 2004

Measurements of erythemally weighted UV radiation are usually related to a horizontal surface. Th... more Measurements of erythemally weighted UV radiation are usually related to a horizontal surface. The radiation is weighted with the sensitivity of the human skin, but the surface of the human body has only few horizontal surfaces. Therefore the UV radiation on inclined surfaces has to be quantified to investigate UV effects on humans. To fulfill this task three fully automatic measuring systems were built to measure the erythemally weighted UV radiation in 27 directions within 2 min. This system measures routinely during the whole day and has now been in operation for nearly three years (in total 2000 measurement days) under any kind of meteorological conditions. The measurements provide the informations needed for further investigations concerning the UV effects on humans. The calibration of the erythemally weighting radiometers was performed in a way to provide reliable UV index measurements for all directions. The results of four exemplary measurement days in summer and winter for clear sky and overcast conditions are presented.

Research paper thumbnail of Long term changes and climatology of UV radiation over Europe

Research paper thumbnail of Comparison of models used for UV index calculations

Photochemistry and …, Jan 1, 1998

Research paper thumbnail of An overview of the results from the comparison of UV-Index forecasted and measured at all atmospheric conditions including clouds

Research paper thumbnail of Routine measurement of erythemally effective UV irradiance on inclined surfaces

Journal of Photochemistry and Photobiology B: Biology, 2004

Measurements of erythemally weighted UV radiation are usually related to a horizontal surface. Th... more Measurements of erythemally weighted UV radiation are usually related to a horizontal surface. The radiation is weighted with the sensitivity of the human skin, but the surface of the human body has only few horizontal surfaces. Therefore the UV radiation on inclined surfaces has to be quantified to investigate UV effects on humans. To fulfill this task three fully automatic measuring systems were built to measure the erythemally weighted UV radiation in 27 directions within 2 min. This system measures routinely during the whole day and has now been in operation for nearly three years (in total 2000 measurement days) under any kind of meteorological conditions. The measurements provide the informations needed for further investigations concerning the UV effects on humans. The calibration of the erythemally weighting radiometers was performed in a way to provide reliable UV index measurements for all directions. The results of four exemplary measurement days in summer and winter for clear sky and overcast conditions are presented.

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