Ultraviolet radiation levels over Bulgarian high mountains

Autor:	Rolf Werner, Boyan Petkov, A. S. Kirillov, Dimitar Valev, Dimitar Danov, Atanas Marinov Atanassov, Veneta Guineva
Rok vydání:	2021
Předmět:	language Astronomy Environmental science Bulgarian General Medicine Ultraviolet radiation language.human_language
Zdroj:	Aerospace Research in Bulgaria. 33:31-39
ISSN:	2367-9522 1313-0927
Popis:	The UV-index (UVI) is a measure of the erythemally effective solar radiation reaching the Earth surface and it was introduced to alert people about the need of Sun protection. The present study applies a model that estimates the UVI over the high Bulgarian mountains for clear sky conditions considering the Total Ozone Content (TOC), which was taken from satellite measurements. The results show that during the periods from May to August at altitudes above 2 000 m a.s.l. very high UVI's (greater than 8) were observed for more than 18 days per month. The UVI values were very high practically for every day of July at altitudes higher than 1 500 m. Extremely high UVI result from episodes with TOC lower than 290 DU during June and July at the highest mountain parts with elevations greater than 2 500 m. High radiation risks were observed during April, especially when the preceding polar vortex was strong and the mountains were snow covered.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::27e4ef7e1dd6da2c65d7c9e951aac455 https://doi.org/10.3897/arb.v33.e03 Zobrazit plný text záznamu Plný text ve formátu PDF