OPTICAL PROPERTIES OF LAKE VENDYURSKOE
| Autor: | Galina Zdorovennova, Arkady Terzhevik, Tatyana Efremova, Galina Gavrilenko, Nikolay I. Palshin, Roman Zdorovennov, Sergey Golosov |
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| Rok vydání: | 2016 |
| Předmět: |
Geography (General)
0208 environmental biotechnology Geography Planning and Development under-ice irradiance 02 engineering and technology Environmental Science (miscellaneous) Albedo Plankton Atmospheric sciences 020801 environmental engineering Water column Boreal Photosynthetically active radiation Attenuation coefficient par attenuation coefficient G1-922 Environmental science Photic zone Stage (hydrology) ice-covered lake photosynthetically active radiation albedo |
| Zdroj: | Geography, Environment, Sustainability, Vol 9, Iss 3, Pp 74-87 (2016) |
| ISSN: | 2071-9388 |
| DOI: | 10.15356/2071-9388_03v09_2016_05 |
| Popis: | We conducted a field study on light conditions in a small boreal Karelian Lake Vendyurskoe over two years. Albedo of ice-covered lake varied from 0.9 to 0.1, and the euphotic zone depth exceeded 3.5 m during the melting stage. The Secchi disc depth changed from 2.5 m after ice-break to 3.7 m at the stage of early summer. The vertical distribution of the photosynthetically active solar radiation (PAR) attenuation coefficient for water Kw was characterized by high spatial (vertical) and temporal (seasonal and interannual) variability which can be connected with the dynamics of plankton cells. The highest values of Kw eached 2–2.8 m–1 in the upper 0.5 m layer of a water column, and decreased to 0.5–1.5 m–1 with increasing depth. The highest values of Kw were marked in the end of ice-covered period. |
| Databáze: | OpenAIRE |
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