Meteorology Hydrology
and Water Management
Research and Operational Applications
ISSN: 2299-3835     eISSN: 2353-5652
Meteorology Hydrology and Water Management

Long-term total solar radiation variability at the Polish Baltic coast in Kołobrzeg within the period 1964-2013

Meteorol. Hydrol. Water Manag. (2016) vol. 4 (2): 35-40
Online publication date: 2016-09-22
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.
total solar radiation, Kołobrzeg, dimming, brightening
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