Siling Lake, also called Selincuo, is one of the largest water bodies on the Tibetan Plateau. Located at an elevation of approximately 4,500 meters (14,860 feet), Siling Lake is a high-altitude endorheic lake, which means that it does not drain through any outlets. The lake is fed by precipitation—approximately 38 centimeters (15 inches) per year—as well as runoff from rain, snow, and glacial meltwater from the surrounding landscape. Siling Lake is a saline water body due to the lack of outflow, which concentrates salts as the lake water evaporates. Changes in global climate have led to fluctuations in lake size, with waterbodies on the southern Tibetan Plateau that have been shrinking, and lakes on the northern portion that have been growing. Siling Lake has been growing since the 1970s, and scientists have used several modeling approaches to try and explain this trend. However, conclusions have varied between two potential causes: an increase in glacial melt runoff, or a decrease in annual wind speed between the 1980s and early 2000s.
Source: https://earthobservatory.nasa.gov/images/150930/siling-lake