Tibetan plateau lakes trap heat under ice
(ORDO NEWS) — The Tibetan Plateau is the largest highlands in the world in terms of area and height, located in Central Asia. Scientists have found that lakes with fresh water there function as lenses that absorb the flow of solar energy and detain it. This information was posted in the Geophysical Research Letters.
At the top of the Qinghai Plateau in the Tibetan Plateau is the largest freshwater system in the world. According to the results of the studies, it turned out that these lakes have a direct effect on the heat transfer of the earth to the atmosphere. Thus, they affect the amount of precipitation and temperature in the regions.
To study this phenomenon at the depth of the largest lake, instruments were installed to measure the pressure and temperature of the water. Lake Ngoring, which was chosen for the experiment, has been frozen over for five months. While the surface of the lake froze, scientists recorded an unusual rise in temperature. This is due to the fact that the streams of the sun warmed up the layers of water closest to the ice.
This is unusual because when freezing, most of the world’s water bodies retain a temperature mark below their maximum density. The temperature mark recorded at Ngoring was outside the maximum density in the direction of warmth, despite the period of glaciation. It is thanks to this fact that the ice thawed at the end of winter was faster.
After the ice was completely thawed, the temperature mark dropped by about 1 degree. During this process, about 500 watts per 1 sq. meter.
Experiments have shown that numerous reservoirs located in the highlands act as hot spots for heat flow. It is noted that this process can have an impact on a global scale.
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