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Advances in Meteorology
Volume 2014, Article ID 613267, 9 pages
http://dx.doi.org/10.1155/2014/613267
Research Article

Estimation of Daily Sunshine Duration from Terra and Aqua MODIS Data

Department of Physics, Faculty of Sciences and Arts, Cukurova University, 01330 Adana, Turkey

Received 2 February 2014; Revised 29 March 2014; Accepted 31 March 2014; Published 15 April 2014

Academic Editor: Luis Gimeno

Copyright © 2014 H. M. Kandirmaz and K. Kaba. 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.

Abstract

Some studies have shown that the estimation of global sunshine duration can be done with the help of geostationary satellites because they can record several images of the same location in a day. In this paper, images obtained from the MODIS (Moderate Resolution Imaging Spectroradiometer) sensors of polar orbiting satellites Aqua and Terra were used to estimate daily global sunshine duration for any region in Turkey. A new quadratic correlation between daily mean cloud cover index and relative sunshine duration was also introduced and compared with the linear correlation. Results have shown that polar orbiting satellites can be used for the estimation of sunshine duration. The quadratic model introduced here works better than the linear model especially for the winter months in which very low sunshine duration values were recorded at the ground stations for many days.