Spatial correlations and distributions of heating and cooling degree-day normals in Turkey

Abstract

This study provides knowledge and basic information concerning the spatial correlations and distribution characteristics of heating and cooling degreeday normals in Turkey at the base temperatures of 5, 10, 15, and 20 °C, and 18 and 24 °C, respectively. The heating and cooling degree–day data are analyzed by multiple regression and spatial correlations developed using as regressors altitude, latitude, and longitude. With other variables held constant, heating degree–day values are positively related to altitude and latitude. The effects of regressors altitude and latitude are both significant, but not that of longitude. Altitude is determined to be the most influential regressor on the heating degree-day distributions. With other variables held constant, cooling degree-day values are negatively related to altitude and latitude while positively related to longitude. The effects of regressors altitude, latitude, and longitude are all significant. Latitude is determined to be the most influential regressor.