Field Measurement of Light Penetration Through Sea Ice

• Published in: ARCTIC
• Main Authors: Little, E.M., Allen, M.B., Wright, F.F.
• Format: Article in Journal/Newspaper
• Language: English
• Published: The Arctic Institute of North America 1972
• Subjects: Carotenoids; Arctic; Sea ice
• Online Access: https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65990

In connection with phytoplankton studies, a non-optical, non-electric instrument has been devised for the measurement of relative light intensity in sea-ice bore holes. When used with a sensitive photometer, absolute values for the ambient light field can be determined within and immediately under the ice. As anticipated, attenuation is greatest at the ice-air interface; values just below the ice surface were 3 to 20% of incident. Another 70 to 100 cm of ice was required to effect a further 50% decrease in illumination. Extinction values were also measured on the ice cores in the laboratory, but scattering greatly complicates the interpretation of laboratory results.