statistical modeling of spatio-temporal variability in monthly average daily solar radiation over turkey统计建模的时空变异性在月日平均太阳辐射土耳其.pdf

Sensors 2007, 7, 2763-2778 sensors ISSN 1424-8220 © 2007 by MDPI /sensors Full Research Paper Statistical Modeling of Spatio-Temporal Variability in Monthly Average Daily Solar Radiation over Turkey Fatih Evrendilek 1,* and Can Ertekin 2 1 Department of Environmental Engineering, Abant Izzet Baysal University, Golkoy Campus, 14280 Bolu, Turkey; Tel: +90 374 253 4640, Fax: +90 374 253 4506; E-mail: fevrendilek@; fevrendilek@.tr 2 Department of Agricultural Machinery, Faculty of Agriculture, Akdeniz University, Antalya, Turkey. E-mail: ertekin@.tr * Author to whom correspondence should be addressed. Received: 31 October 2007 / Accepted: 14 November 2007 / Published: 15 November 2007 Abstract: Though one of the most significant driving forces behind ecological processes such as biogeochemical cycles and energy flows, solar radiation data are limited or non- existent by conventional ground-based measurements, and thus, often estimated from other meteorological data through (geo)statistical models. In this study, spatial and temporal patterns of monthly average daily solar radiation on a horizontal surface at the ground level were quantified using 130 climate stations for the entire Turkey and its conventionally- accepted seven geographical regions through multiple linear regression (MLR) models as a function of latitude, longitude, altitude, aspect, distance to sea; minimum, maximum and mean air temperature and relative hu