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https://hdl.handle.net/11681/9419| Title: | Near-infrared reflectance of snow-covered substrates |
| Authors: | United States. National Earth Satellite Service O'Brien, Harold W. Koh, Gary |
| Keywords: | Cold regions Reflectance Snow Snow cover Solar radiation Plant growing media |
| Publisher: | Cold Regions Research and Engineering Laboratory (U.S.) Engineer Research and Development Center (U.S.) |
| Series/Report no.: | CRREL report ; 81-21. |
| Description: | CRREL Report Abstract: The reflection of solar radiation by snow cover in situ and the apparent influence of selected substrates were examined in wavelength bands centered at 0.81, 1.04, 1.10,1.30, 1.50 and 1.80 micrometers. Substrates included winter wheat, timothy, corn, alfalfa, grass, concrete and subsurface layers of "crusty" snow and ice. Reasonable qualitative agreement between measurements and theoretical predictions was demonstrated, with indications of quantitative agreement in the definition of a "semi·infinite depth" of snow cover. It was concluded that ultimate quantitative agreement between theory and measurement will require that an "optically effective grain size" be defined in terms of physically measurable dimensions or meteorologically predictable characteristics of the ice crystals composing the snowpack. |
| Rights: | Approved for public release; distribution is unlimited. |
| URI: | http://hdl.handle.net/11681/9419 |
| Appears in Collections: | CRREL Report |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| CR-81-21.pdf | 3.37 MB | Adobe PDF |  View/Open |