Optical teledetection of chlorophyll a in turbid inland waters
Optical teledetection of chlorophyll a in turbid inland waters
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DOI：
10.1021/es9809657
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发表时间：
1999-04-01
影响因子：
11.4
通讯作者：
Gons, HJ
中科院分区：
文献类型：
--
作者：
Gons, HJ
使用手持式光谱辐射计测定地下光谱辐照度反射率，然后估算叶绿素 a (Chl-a) 浓度，有助于评估浑浊湖泊、河流和河口的生态变化。该方法在太阳高度角和天气变化很大的情况下应用。通过表面波理论和现场数据评估了反射天空光引起的噪声。对于包括艾瑟尔河（荷兰）在内的浅层富营养化淡水艾瑟尔泻湖，修正后的 Chi-a 浓度 (3-185 mg m(-3)) 与 704 和 672 nm 的反射比之间建立了密切的关系，其中反向散射源自 776 nm 的反射比（R-2 > 0.95；N = 114；估计的标准误差）
Determination of subsurface spectral irradiance reflectance by use of a hand-held spectroradiometer and then estimation of chlorophyll a (Chl-a) concentration facilitate assessment of ecological change in turbid lakes, rivers, and estuaries. The method was applied under widely varying solar elevation and weather. Noise due to reflected sky light was evaluated by theory on surface waves and by field data. A strong relationship was established for the shallow and eutrophic freshwater IJssel Lagoon including the River IJssel (The Netherlands) between corrected Chi-a concentrations (3-185 mg m(-3)) and the reflectance ratio for 704 and 672 nm with backscattering derived from the reflectance at 776 nm (R-2 > 0.95; N = 114; Standard error of estimate