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Attenuation of ultraviolet radiation and photosynthetically active radiation in six Yunnan Plateau lakes of China based on seasonal field investigations
Journal of Limnology ( IF 1.673 ) Pub Date : 2020-02-26 , DOI: 10.4081/jlimnol.2020.1951 Weilu Wang , Xuan Yang , Licheng Huang , Jiang Qin , Qichao Zhou
Journal of Limnology ( IF 1.673 ) Pub Date : 2020-02-26 , DOI: 10.4081/jlimnol.2020.1951 Weilu Wang , Xuan Yang , Licheng Huang , Jiang Qin , Qichao Zhou
Solar radiation is a primary driver affecting several physical, chemical and biological processes in lake ecosystems. The attenuation of sunlight in water is directly controlled by optically active substances. Here, the seasonal and interlake heterogeneities of the diffuse attenuation coefficients (Kd(λ)) of ultraviolet radiation (UVR) and photosynthetically active radiation (PAR) were studied based on field investigations in six Yunnan Plateau lakes (i.e., Chenghai, Dianchi, Erhai, Fuxian, Lugu and Yangzong) of China, October 2014‒July 2016. The results revealed that Kd(λ) generally increased with decreasing wavelength and increasing trophic state and that Kd(UVR) presented higher interlake heterogeneity than Kd(PAR). The interlake heterogeneity surpassed the seasonal heterogeneity of Kd(λ), whereas the intralake seasonal heterogeneity, which is related to the lake trophic state and solar spectrum, was obvious. Although the main factors affecting Kd(λ) were chromophoric dissolved organic matter (CDOM) and Ac ce pt d A rtic le
更新日期：2020-02-26
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