Spectral downwelling irradiance in an Antarctic lake

Spectral downwelling irradiance (400-700 nm) was determined in the ice-covered Lake Hoare located in the dry valleys near McMurdo Sound, Antarctica. Full waveband PAR beneath the ice was < 44 mu E multiplied by m super(-2) multiplied by s super(-1) or < 3% of surface downwelling irradiance. Ma...

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Bibliographic Details
Published in:Polar biology 1987-05, Vol.7 (3), p.145-151
Main Authors: Palmisano, A.C, Simmons, G.M. Jr
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
aquatic environment
Biological and medical sciences
Freshwater
Fundamental and applied biological sciences. Psychology
lakes
light transmission
limnology
phytoplankton
solar radiation
Synecology
Terrestrial ecosystems
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Summary:Spectral downwelling irradiance (400-700 nm) was determined in the ice-covered Lake Hoare located in the dry valleys near McMurdo Sound, Antarctica. Full waveband PAR beneath the ice was < 44 mu E multiplied by m super(-2) multiplied by s super(-1) or < 3% of surface downwelling irradiance. Maximum light transmission just beneath the 2.6-4 m ice cover, which contained sediments and air bubbles, occurred between 400-550 nm. In the water column below, attenuation of light by phytoplankton in the 400-500 nm region and between 656-671 nm suggested absorption of light by algal pigments.
ISSN:0722-4060
1432-2056
DOI:10.1007/BF00259202