首页> 外文期刊>Remote Sensing of Environment: An Interdisciplinary Journal >OPTICAL PROPERTIES OF THE WATER IN A DELTAIC ENVIRONMENT - PROSPECTIVE TOOL TO ANALYZE SATELLITE DATA IN TURBID WATERS
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OPTICAL PROPERTIES OF THE WATER IN A DELTAIC ENVIRONMENT - PROSPECTIVE TOOL TO ANALYZE SATELLITE DATA IN TURBID WATERS

机译:德尔塔环境中水的光学性质-用于分析湍流水中卫星数据的专用工具。

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摘要

In vivo absorption spectra, pigment concentrations from algal cultures, and field samples (Po Delta, Northern Italy) are analyzed to differentiate the contribution by each optically active constituent to the total absorption by the water. The results yield systematic trends in the blue:red and blue:NIR absorption ratio for living phytoplankton cells and detrital material, which are then used to retrieve the absorption coefficient of dissolved organic material (yellow substance) at 410 nm from the total ill vivo absorption coefficients of natural waters at 410 nm, 670 not, and 730 nm. A simple model was then been applied to retrieve in situ absorption coefficient by yellow substance and for different values of blue:red/NIR absorption ratios. Sensitivity and regional tests in the studied site and in the Baltic shores that the model can explain more than 85% of the variance in the observed data under various conditions of turbidity, and shows that predicted yellow substance is more sensitive to a change in detrital material than a change in living phytoplankton. Such work can be used with remote sensing techniques to differentiate the optically active constituents in coastal and turbid waters. Suggestions are given to solve the problem related to the backscattering coefficient of the water, and to propose an accurate method to remove the atmospheric effect from the remotely sensed signal. [References: 51]
机译:在体内吸收光谱,藻类培养物中的色素浓度和现场样品(意大利北部的波塔三角洲)进行了分析,以区分每种光学活性成分对水总吸收的贡献。结果得出活的浮游植物细胞和碎屑物质在蓝色:红色和蓝色:NIR吸收率方面的系统趋势,然后用于从总体内不良生物吸收中获取410 nm处溶解的有机材料(黄色物质)的吸收系数410 nm,670 not和730 nm的天然水的系数。然后应用一个简单的模型来获取黄色物质的原位吸收系数,以及蓝色,红色/ NIR吸收比的不同值。在研究地点和波罗的海沿岸进行的敏感性和区域测试表明,该模型可以解释在各种浊度条件下观测数据的超过85%的方差,并且表明预测的黄色物质对碎屑物质的变化更敏感而不是活体浮游植物的变化。这项工作可与遥感技术一起使用,以区分沿海和浑浊水域中的旋光成分。提出了解决与水的反向散射系数有关的问题的建议,并提出了一种从遥感信号中消除大气影响的准确方法。 [参考:51]

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