What protective measures are there in Lake Baikal?

The average temperature around Lake Baikal in winter is -38℃, which is really cold, but the lake freezes every year from/kloc-0 to May, releasing latent heat and alleviating the cold in winter. In summer, the lake thaws and absorbs a lot of heat, which reduces the heat. Therefore, some people say that Lake Baikal is a natural two-way giant "air conditioner", which plays a regulating role in the climate of the lakeside area. In a year, although ice with a thickness of 60 cm is accumulated on the surface of Lake Baikal for five months, sunlight can penetrate the ice layer and input heat energy into the lake, forming a "greenhouse effect", which makes the lake water in winter close to the water temperature in summer, which is conducive to plankton reproduction, thus directly or indirectly providing food for other aquatic animals and promoting their development and growth. According to the underwater automatic thermometer, the water temperature at the bottom of Lake Baikal is at least -4.4℃ in winter, which is higher than the water temperature on the lake surface. Lake Baikal can adjust the continental climate on the lakeside.