Spectral downwelling irradiance in an Antarctic lake

  title={Spectral downwelling irradiance in an Antarctic lake},
  author={Anna C. Palmisano and G. Millard Simmons},
  journal={Polar Biology},
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 <44μE·m-2·s-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 400–500 nm. In the water column below, attenuation of light by phytoplankton in the 400–500 nm region and between 656–671 nm… CONTINUE READING

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