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【24h】 Continuous spectral measurement of backscattering in sea water

机译海水中反向散射的连续光谱测量

【摘要】A prototype for an active backscattering probe for continuous backscattering spectrum measurement in sea water was designed and tested in both lab and field experiments. For the laboratory experiments, at various algae concentrations, the impact of overlapping chlorophyll fluorescence was effectively eliminated by using a long pass filter on the excitation light source. In the field tests with an active light source, and under the conditions of strong algal scattering (eg bloom conditions) it was shown that the impact of ambient background day light can be accounted for by successive measurements with the lamp illumination periodically on-off. The results show that the spectral shape of backscattering of algae cells is highly structured and consistent with Mie calculations which take into account the anomalous dispersion due to the strong absorption features of chlorophyll. The backscatter ratio, however, is found to be stable (within 10%) throughout the entire spectral region outside the chlorophyll fluorescence band, even when scattering is dominated by that from algae cells.

【摘要机译】设计了一种用于在海水中进行连续反向散射光谱测量的有源反向散射探头的原型,并在实验室和现场实验中进行了测试。对于实验室实验,在各种藻类浓度下,通过在激发光源上使用长通滤光片,可以有效消除重叠的叶绿素荧光的影响。在使用有源光源的现场测试中,以及在强藻类散射条件下(例如,大华条件),表明可以通过在定期关闭灯照明的情况下进行连续测量来解决周围背景日光的影响。结果表明,藻类细胞向后散射的光谱形状高度结构化,并且与Mie计算一致,Mie计算考虑到由于叶绿素的强吸收特性而导致的异常分散。但是,即使在以藻类细胞的散射为主的情况下,在叶绿素荧光带以外的整个光谱区域中,反向散射率也保持稳定(在10%以内)。

【原文格式】PDF

机译 反向散射光谱;反向散射传感器;现场测量;
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