ORIGINAL PAPER
Long-term total solar radiation variability at the Polish Baltic coast in Kołobrzeg within the period 1964-2013
 
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1
Division of Meteorology and Climatology, Warsaw University of Life Sciences, ul. Nowoursynowska 166, 02-787 Warsaw, Poland
2
Meteorology Department, Poznan University of Life Sciences, ul. Piątkowska 94, 60-649 Poznań, Poland
3
Department of Matters and Energy Fluxes, Global Change Research Institute, CAS, v.v.i., Belidla 4a, 603 00 Brno, The Czech Republic
CORRESPONDING AUTHOR
Małgorzata Kleniewska   

Division of Meteorology and Climatology, Warsaw University of Life Sciences, ul. Nowoursynowska 166, 02-787 Warsaw, Poland, Nowoursynowska 166, 02-787 Warsaw, Poland
Publication date: 2016-09-22
 
Meteorology Hydrology and Water Management, 4(2),35–40
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ABSTRACT
This study is based on a 50-year data series (1964-2013) of total solar radiation (G) from the Kołobrzeg - station that is located on the Polish Baltic Sea coast and is characterised by a very high level of air quality. To find and remove gross errors, quality control checking procedures were applied in this study. Additionally, the homogeneity of the G series in this study has been tested on a monthly basis by using of the Standard Normal Homogeneity Test for single shifts. We found a statistically non-significant decrease in G during the period from 1964 to 2013. The decrease in the 5-year mean total solar radiation is evident from the beginning of the 1980s, with the minimum mean value occurring in the second half of the 1990s, while G slightly increased from the early 2000s. The analysis of seasonal G patterns shows that total solar radiation in summer is the most similar to the annual pattern and only the summer series trend shows a statistically significant decrease in G. We also have found two noticeable tendencies in monthly anomalies of G over the studied decades; they are negative trends in May and August. The shape of the decadal daily G histogram remained unchanged during the analysed decades.