The present study investigates the effect of limnology on the spectral reflectance of a freshwater lake, located in an ice-free area in the Antarctic Peninsula. Field-collected samples generated limnological and spectral parameters. This fact indicates that the studied lake has an ultra-oligotrophic/oligotrophic nature based on chlorophyll a (chl a), which registered concentrations below 3 μg l-1 with no total suspended solids, almost neutral pH and transparency equalled by depth. The water spectral behaviour in each sampling station indicates that the benthic characteristics of the lake have a strong influence as the reflectance at the 705 nm wavelength being greater than that at 583 nm signals the presence of soil and/or vegetation at its bottom. Hence, it is believed that the orbital sensors with spectral bands focused on regions between the green and red edge, such as the MultiSpectral Instrument (MSI) sensor, may present better results for distinguishing the different bottom types found in the research area.

中文翻译：

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南极洲纳尔逊岛和谐点淡水湖的湖沼学和光谱行为

本研究调查了湖沼学对位于南极半岛无冰区的淡水湖光谱反射率的影响。现场采集的样本产生湖沼和光谱参数。这一事实表明，所研究的湖泊具有基于叶绿素的超贫营养/贫营养性质一种(chl一种)，其浓度低于 3 μg l-1没有总悬浮固体，pH 值几乎为中性，透明度与深度相等。每个采样站的水光谱行为表明湖泊的底栖特征有很大的影响，因为 705 nm 波长的反射率大于 583 nm 波长的反射率，表明其底部存在土壤和/或植被。因此，认为光谱带集中在绿色和红色边缘之间区域的轨道传感器，例如多光谱仪器（MSI）传感器，可能会为区分研究区域中发现的不同底部类型提供更好的结果。