Title of article :
Spatial and seasonal variations in attenuation of solar ultraviolet radiation in Lake Biwa, Japan
Author/Authors :
Hayakawa، نويسنده , , Kazuhide and Sugiyama، نويسنده , , Yuko، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2008
Pages :
13
From page :
121
To page :
133
Abstract :
Seasonal changes in diffuse ultraviolet (UV) and visible light attenuations and inherent optical properties in the lake water were monitored at the pelagic and littoral shallow zones of Lake Biwa which features a broad range of optical conditions within a single large water body. We considered the absorption factors that affect UV attenuation, and clarified the contribution of the absorption of suspended particles and chromophoric dissolved organic matter (CDOM) by multiple regression analyses of the monitoring data. The variability of UV attenuations in the lake demonstrated a strong contrast between the pelagic and the shallow zones. The latter were characterized by turbid systems supplying suspended matter as well as CDOM, whereas the former was far from the turbid systems in the littoral zone or the lake bottom. In this lake, the regulation of UV and light attenuations is rendered competitive by the absorption of suspended particles and CDOM in the lake water, hence, the UV penetration has both spatial and temporal variability based on changes in the physical and biological condition of the lake.
Keywords :
suspended matter , Lake Biwa , Inherent optical property , Ultraviolet attenuation , chromophoric dissolved organic matter
Journal title :
Journal of Photochemistry and Photobiology B:Biology
Serial Year :
2008
Journal title :
Journal of Photochemistry and Photobiology B:Biology
Record number :
1876004
Link To Document :
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