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Journal of Solar Energy
Volume 2014 (2014), Article ID 306871, 7 pages
Research Article

About the Relation between Sunshine Duration and Cloudiness on the Basis of Data from Hamburg

Institute for Geophysics and Meteorology, University of Cologne, Pohligstraße 3, 50969 Cologne, Germany

Received 4 February 2014; Accepted 28 March 2014; Published 10 April 2014

Academic Editor: Guillaume Zoppi

Copyright © 2014 Stefanie Neske. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The aim of this paper is to relate the two meteorological parameters known as relative (bright) sunshine duration and cloudiness using the data from two stations of the city of Hamburg, Germany. We test the classic linear relationship, as well as newer polynomial extensions suggested in the literature. The results of regression are interpreted against a theoretical background recently put forward by Badescu. The suggested relations can be borne out, but we also point out difficulties due to data quality and insufficiency.