Call number:
ZSP-201-81/21
In:
CRREL Report, 81-21
Description / Table of Contents:
The reflection of solar radiation by a 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 measuarable dimensions or meteorologically predictable characteristics of the ice crystals composing the snowpack.
Type of Medium:
Series available for loan
Pages:
iii, 17 Seiten
,
Illustrationen
Series Statement:
CRREL Report 81-21
URL:
https://hdl.handle.net/11681/9419
Language:
English
Note:
CONTENTS
Abstract
Preface
Introduction
Experimental method
Substrate preparation
Experimental configuration
Radiometric measurements
Snow characterization
Reflectance standards
Data analysis
Reflectance measurements
Snow replica analysis
Discussion of results
Comparative reflectance of various substrates under snow
Ablation of a snow cover
Reflectance from a very light, fresh snow cover
Measurements at angles other than vertical
Reflectance from substrates
Concluding observations
Literature cited
Location:
AWI Archive
Branch Library:
AWI Library
Permalink
