SNOW AND ICE ALBEDO MEASURED WITH TWO TYPES OF PYRANOMETERS

In order to obtain total short-wave albedos of snow and ice, both incident and reflected solar radiation were measured over a frozen lake surface using two different types of radiation measurement devices: a Kipp and Zonen thermopile pyranometer with a spectral sensitivity of 300 to 2800 nm and a LI...

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Bibliographic Details
Published in:Journal of the American Water Resources Association 1998-12, Vol.34 (6), p.1487-1494
Main Authors: Henneman, Heather E., Stefan, Heinz G.
Format: Article
Language:English
Subjects:
photovoltaic sensors
pyranometer
snow and ice albedo
solar radiation
thermopile
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Summary:In order to obtain total short-wave albedos of snow and ice, both incident and reflected solar radiation were measured over a frozen lake surface using two different types of radiation measurement devices: a Kipp and Zonen thermopile pyranometer with a spectral sensitivity of 300 to 2800 nm and a LI-COR photovoltaic pyranometer with a spectral sensitivity of 400 to 1100 nm. The spectral response of the LI-COR pyranometers limits its use as a short-wave radiation measurement device. Therefore, two equations were developed to adjust both the daily incident radiation data and the daily reflected radiation data measured by the LI-COR instrument to total short-wave radiation values, i.e., to the waveband of 300 to 2800 nm (visible to near-infrared spectrum). The LI-COR data were then adjusted, and a total short-wave adjusted albedo was calculated with a modeling efficiency of 0.97.
ISSN:1093-474X
1752-1688
DOI:10.1111/j.1752-1688.1998.tb05447.x