;The authors wish to thank the Research Division, Brigham Young University, for a grant to pursue this topic; James Walker for piloting the aircraft and for photographic advice; Kelly Nielsen for the cartographic work, and Anthony Brazel and Charles Ryerson for very helpful comments.
TOPOGRAPHIC SHADING AND GEOGRAPHICAL PATTERNS OF DIRECT SOLAR RADIATION IN MOUNTAINOUS REGIONS*
Article first published online: 23 FEB 2005
The Professional Geographer
Volume 38, Issue 4, pages 383–390, November 1986
How to Cite
Stevens, D. J. and Grey, A. H. (1986), TOPOGRAPHIC SHADING AND GEOGRAPHICAL PATTERNS OF DIRECT SOLAR RADIATION IN MOUNTAINOUS REGIONS. The Professional Geographer, 38: 383–390. doi: 10.1111/j.0033-0124.1986.00383.x
- Issue published online: 23 FEB 2005
- Article first published online: 23 FEB 2005
- topographic shading;
- mountain climatology;
- Wasatch Mountains;
- isochronal maps;
- aerial photography
Topographic shading curtails the period and complicates the geographic patterns of insolation in mountainous areas. Maps derived from oblique aerial photographs of shadow lines cast by the irregular, mountainous east horizon in Provo, Utah are used as a case study to illustrate an alternative to existing techniques of solar radiation data collection. For study areas of several hundred square kilometers, this method may be superior in resolution and at the same time more error free and economically feasible than other methods. Measurement of solar inputs received at sample stations scattered through the mapped area show that the phenomenon of topographically delayed sunrise has a distinct effect on daily totals of radiation in the manner suggested by the maps.