Temporal and spatial variability of UV radiation and UV resources over Northern Eurasia

Nezval’, Y.I.; Chubarova, N.Y.; Zhdanova, Y.Y.; Rosental’, V.A.; Poliukhov, A.A.

Авторы: Nezval’ Ye I., Chubarova N.Ye, Zhdanova Ye Yu, Rosental’ V.A., Poliukhov A.A.
Сборник: INTERNATIONAL SYMPOSIUM «ATMOSPHERIC RADIATION and DYNAMICS» (ISARD –2015)
Тезисы
Год издания: 2015
Место издания: Saint-Petersburg- Petrodvorets
Первая страница: 15
Последняя страница: 15
Аннотация: Using accurate RT modelling we analyzed the spatial and temporal distribution of UV radiation and UV resources over the territory of Northern Eurasia with 1 degree resolution in clear sky and average cloudy conditions. Different types of biologically active UV radiation (BAUVR) affecting skin and inducing eye damage were under consideration. We obtained the quantitative assessments of the effects of different factors (ozone, aerosol, surface albedo, cloudiness and altitude above sea level) on various types of BAUVR. The effective parameterization of altitude UV dependence have been developed, which takes into account for the changes in atmospheric pressure, ozone, aerosol and surface albedo. Its comparison with the UV measurements in the mountainous regions of Asia showed a good agreement. We also obtained quantitative BAUVR dependences on urban opacity according to the experimental studies. A series of UV measurements on different oriented surfaces for snow and snow-free conditions revealed a slight increase in UV radiation (15-25%) in the solar disk direction and a significant UV reduction in other directions, which is in agreement with model calculations. Using the results of long-term UV measurements at the Meteorological Observatory of Moscow State University and the UV reconstruction model we analyzed the UV trends and evaluated the contribution of different factors in UV interannual variability. In addition, the UV trends were compared witht the results of UV reanalysis. The distribution of UV resources (UV deficiency, UV optimum and UV excess) was obtained over the territory of Northern Eurasia using a special developed method (Chubarova, Zhdanova, 2013). Special attention was paid to the assessments of the UV eye-damage effects. We showed that the areas of eye-damage UV radiation dangerous for human health are observed in northern and eastern regions of Russia in spring. The account for this BAUVR significantly (up to 50%) reduces the area with UV optimum conditions. Based on the results of this study an interactive program for calculating UV radiation and UV resources has been developed. (www.momsu.ru/uv/). This work was partially supported by the RFBR project #15-05-03612. Reference: Chubarova, N., Zhdanova, Ye., 2013. Ultraviolet resources over Northern Eurasia, Journal of Photochemistry and Photobiology B: Biology, Elsevier, 127, 38-51.
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