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Local air pollutants threaten Lake Tahoe's clarity

机译：当地的空气污染物威胁着犹豫湖的清晰度

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Lake Tahoe is a high-altitude (6,227 feet) lake located in the northern Sierra Nevada at the California-Nevada border. During the second half of the 20th century, the decline in Lake Tahoe's water clarity and degradation of the basin's air quality became major concerns. The loading of gaseous and particulate nitrogen, phosphorus and fine soil via direct atmospheric deposition into the lake has been implicated in its eutrophication. Previous estimates suggest that atmospheric nitrogen deposition contributes half of the total nitrogen and a quarter of the total phosphorus loading to the lake, but the sources of the atmospheric pollutants remain unclear. In order to better understand the origins of atmospheric pollutants contributing to the decline in Lake Tahoe's water clarity, we reviewed a series of studies performed by research groups from the U.S. Department of Agriculture's Forest Service, UC Davis and the Desert Research Institute. Overall, the studies found that the pollutants most closely connected to the decline in Lake Tahoe's water quality originated largely from within the basin.
机译：泰浩湖是一座高空（6,227英尺）湖，位于塞拉尼亚北部的塞拉尼达州的北部边界。在20世纪下半叶，泰浩湖水澄清和盆地空气质量下降的下降成为主要问题。通过直接大气沉积进入湖泊的气态和颗粒状氮，磷和细土壤的装载已经涉及其富营养化。以前的估计表明，大气氮沉积贡献总氮的一半和四分之一的磷含量为湖泊，但大气污染物的来源仍然不清楚。为了更好地了解大气污染物的起源，有助于湖泊湖水澄清的下降，我们审查了来自美国农业部森林服务部，UC戴维斯和沙漠研究所的研究小组进行的一系列研究。总体而言，研究发现，污染物最密切关联到泰浩湖水质下降的主要原因在盆地内起源于盆地。

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