ASSESSMENT OF SOLAR RADIATION IN THE REGION OF LAKE MIEDWIE FOR RECREATIONAL PURPOSES
Journal Title: Folia Pomeranae Universitatis Technologiae Stetinensis Agricultura Alimentaria Piscaria et Zootechnica - Year 2018, Vol 48, Issue 345
Abstract
The aim of the paper is the assessment of the amount and variability of sums of global solar radiation, diffuse radiation and direct radiation in the area of Lake Miedwie and the resulting conditions for recreation. For this purpose, the study was based on hourly and 24-hour period measurements of the aforementioned types of radiation obtained from the Agrometeorological Station in Lipnik in the vicinity of Stargard in the period 2008–2017 – the measurements were taken using Delta T BF3 Sunshine Sensors. The temporal distribution of global, diffuse and direct radiation was determined according to hours, days, months, seasons and years with average and extreme values as well as coefficient of variation (W%). The percentage share of sums of diffuse and direct radiation in global solar radiation was calculated and, on the basis of skin erythema dose (SED), safe tanning time for people with blond, chestnut and dark hair was identified for a given day during the warm half-year in the region of Lake Miedwie. There is a high temporal variability and uneven distribution of the types of radiation observed from month to month as well as from year to year. Moreover, the predominance of direct radiation in spring, as compared with autumn, is more than two-fold and more than 18 times greater in summer than in winter. The course of annual radiation is characterised by the occurrence of severaldays- long periods of increased or reduced radiation sum. From the last days of March to the first decade of August, mean daily global solar radiation sums is above 4000 W · m–2, and from mid-April to the first days of August it exceeds 5000 W · m–2. From May to August the intensity of direct solar radiation around the noon on sunny days can be onerous and, with increasing sunbathing time, even hazardous to health.
Authors and Affiliations
Czesław KOŹMIŃSKI, Bożena MICHALSKA
Keywords
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