Statistical representation of mountain shading
Shadows cast by the mountains themselves have a strong influence on the surface energy balance of mountainous regions. If the influence of shadows is to be included on sub-grid scales in a surface energy balance model, a statistical representation has to be used. Slope components calculated from d...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2004-01-01
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| Series: | Hydrology and Earth System Sciences |
| Online Access: | http://www.hydrol-earth-syst-sci.net/8/1047/2004/hess-8-1047-2004.pdf |
| _version_ | 1818565298340495360 |
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| author | R. Essery R. Essery |
| author_facet | R. Essery R. Essery |
| author_sort | R. Essery |
| collection | DOAJ |
| description | Shadows cast by the mountains themselves have a strong influence on the surface energy balance of mountainous regions. If the influence of shadows is to be included on sub-grid scales in a surface energy balance model, a statistical representation has to be used. Slope components calculated from digital elevation models of areas in North Wales and the French Alps are found to have double-exponential distributions. From this result, expressions are developed for the fractions of the areas that will be either self-shaded or shaded by remote topography as functions of solar elevation and time of day. These expressions are in good agreement with results from a terrain shading model. </p> <p style='line-height: 20px;'><b>Keywords: </b>solar radiation, topography, surface energy balance, statistical parameterisation |
| first_indexed | 2024-12-14T01:39:32Z |
| format | Article |
| id | doaj.art-8b7a6ced75734a6bbd1385fab5e4cd7e |
| institution | Directory Open Access Journal |
| issn | 1027-5606 1607-7938 |
| language | English |
| last_indexed | 2024-12-14T01:39:32Z |
| publishDate | 2004-01-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Hydrology and Earth System Sciences |
| spelling | doaj.art-8b7a6ced75734a6bbd1385fab5e4cd7e2022-12-21T23:21:48ZengCopernicus PublicationsHydrology and Earth System Sciences1027-56061607-79382004-01-018610471052Statistical representation of mountain shadingR. EsseryR. EsseryShadows cast by the mountains themselves have a strong influence on the surface energy balance of mountainous regions. If the influence of shadows is to be included on sub-grid scales in a surface energy balance model, a statistical representation has to be used. Slope components calculated from digital elevation models of areas in North Wales and the French Alps are found to have double-exponential distributions. From this result, expressions are developed for the fractions of the areas that will be either self-shaded or shaded by remote topography as functions of solar elevation and time of day. These expressions are in good agreement with results from a terrain shading model. </p> <p style='line-height: 20px;'><b>Keywords: </b>solar radiation, topography, surface energy balance, statistical parameterisationhttp://www.hydrol-earth-syst-sci.net/8/1047/2004/hess-8-1047-2004.pdf |
| spellingShingle | R. Essery R. Essery Statistical representation of mountain shading Hydrology and Earth System Sciences |
| title | Statistical representation of mountain shading |
| title_full | Statistical representation of mountain shading |
| title_fullStr | Statistical representation of mountain shading |
| title_full_unstemmed | Statistical representation of mountain shading |
| title_short | Statistical representation of mountain shading |
| title_sort | statistical representation of mountain shading |
| url | http://www.hydrol-earth-syst-sci.net/8/1047/2004/hess-8-1047-2004.pdf |
| work_keys_str_mv | AT ressery statisticalrepresentationofmountainshading AT ressery statisticalrepresentationofmountainshading |