| 太湖梅梁湾水体中可见光的衰减、吸收及散射 |
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| 引用本文： | 杨顶田,陈伟民,张运林. 太湖梅梁湾水体中可见光的衰减、吸收及散射[J]. 上海环境科学, 2003, 22(9): 591-594,598 |
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| 作者姓名： | 杨顶田 陈伟民 张运林 |
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| 作者单位： | 中国科学院南京地理与湖泊研究所，中国科学院南京地理与湖泊研究所，中国科学院南京地理与湖泊研究所 南京 210008，南京 210008，南京 210008 |
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| 基金项目： | 中国科学院知识创新工程重大项目资助,编号KZCX1-SW-12 |
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| 摘 要： | 对太湖梅梁湾沿岸带和敞水区的水体进行了光学特性研究。结果发现，沿岸带的水下光辐射衰减系数(Kd)值较敞水区小；400nm与500nm向上辐照度比值(Eu440／Eu550),沿岸带在1m左右最小,敞水区在0．5m左右最小;沿岸带的水面下向上辐照度与向下辐照度的比值(R)低于敞水区：440、550、670nm的后向散射与吸收的比值(b／a),在沿岸带的1m处最大,敞水区在0．5m处最大。这些结果说明,相对于敞水区而言,沿岸带的光衰减较弱,无机悬浮颗粒的含量较少,最大叶绿素a分布较深。
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| 关 键 词： | 太湖梅梁湾水体 可见光 衰减 吸收 散射 光学特性 光辐射 辐照度 叶绿素 透光强度 生物 |
Attenuation, Absorption and Scattering of Visible Light in Water of Meiliang Bay, Lake Taihu |
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| Yang Dingtian Chen Weimin Zhang Yunlin. Attenuation, Absorption and Scattering of Visible Light in Water of Meiliang Bay, Lake Taihu[J]. Shanghai Environmental Science, 2003, 22(9): 591-594,598 |
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| Authors: | Yang Dingtian Chen Weimin Zhang Yunlin |
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| Abstract: | Kd in coast water was smaller than that in open water region, the smallest value of the ratio of upward irradiation of 400nm and 500nm was about 1m in coast water, and 0.5m in open water region; the ratio of upward irradiation and downward irradiation (R) on coast surface water lower than in open water region; ratio of backward scattering of 440, 550 and 470nm and absorption value (ba/a) was largest in 1m of coast water and 0.5m in open water region. This indicated that relative to open water region, attenuation of coast region was weaker, with less inorganic par ticulates and distribution of largest chlorophyu a was deeper. |
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| Keywords: | Visible light in water Coast region Open water region Under water irradiation factor Ratio of irradiation Ratio of scatlering Light and absorbing light Meiliang Bay of Lake Taihu |
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