Author(s): Elina Jaatinen; Matti Lepparanta; Ants Erm; Ruibo Lei; Ove Parn; Lauri Arvola; Anniina Kiiltomaki
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Abstract: A field program on the structure and optical properties of ice and snow was undertaken in Lake Vanajavesi, southern Finland in March–April 2009. Results presented here include ice and snow cover structure, sunlight level, albedo, diffuse attenuation coefficient, and light conditions beneath ice cover. Albedo showed a systematic decrease from about 0.8 for dry snow to 0.2 for wet bare ice in spring. The e-folding depth of light level was 50–70 cm for congelation ice and 10–20 cm for snow-ice. Light transmissivity varied between 0.25–0.50 when the snow was thin or absent, and then the euphotic depth was 1–2 m beneath the ice.
Year: 2010