Premium
Equations for potential annual direct incident radiation and heat load
Author(s) -
McCune Bruce,
Keon Dylan
Publication year - 2002
Publication title -
journal of vegetation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 115
eISSN - 1654-1103
pISSN - 1100-9233
DOI - 10.1111/j.1654-1103.2002.tb02087.x
Subject(s) - latitude , radiation , environmental science , simultaneous equations , meteorology , index (typography) , computer science , mathematics , geology , geography , geodesy , physics , mathematical analysis , optics , world wide web , differential equation
. Estimation of potential annual direct incident radiation has traditionally required numerical integration with simulation models. As an alternative, we present convenient equations for use in spreadsheet, GIS, and database applications. Input variables are latitude, slope, and aspect. The equations apply to 0–60° north latitude, slopes from 0–90°, and all aspects. By transforming aspect, the equations can also be applied as an index of heat load, symmetrical about a northeast to southwest axis.