Tatra Mountains

In the high Tatra Mountains located in Slovakian, Hikers discovered a lake on which you can walk on! However, They are not walking on water... They are walking on ice. This crystal clear ice is so clear, you can see the lakes floor. But what makes it do this? Why is it that not every lake has crystal clear topping? Do its surroundings have anything to do with it?  How does the climate effect aquatic animals and lake waters? 

Salinity and temperature: 

During the winter time a increase in ice is made resulting in creation of salinity. However, in the summer, the warmer climates create a slight decrease in salinity but the lower levels of the water stay cool or the aquatic animals. 

Topography in Slovakia

Source: http://www.nationsencyclopedia.com/Europe/Slovakia.html

Rugged mountains fill the central and northern parts of the country, Even in the lowlands of the south. High Tatras along the polish border are disperse between many lakes and deep valleys. 

Climate change: 

The terrian is mostly mountainous and alpine. It is cold and has high moisture. In winters snow covers the mountains. Rainfall occurs only due to westerly winds, in which result in 49 cm a year. Rainfall can exceed to 200 cm in the high Tatras. Sudden changes in the weather occur rather frequently and can last for eight to ten hours.

Source: http://www.slovak-republic.org/high-tatras/ AND http://www.nationsencyclopedia.com/Europe/Slovakia.html

Sunlight and Seasons:

Slovakia is known for being a ski region in the winter time. The winters are cold, and the summers are hot. In Summer, which starts on the 22nd of June, is very hot and has a daily temperature of 30*c, July is the warmest of all seasons and remains a temperature of 37* to 40*c. Showers and thunderstorms are very normal, they have something called Medard drop, which is 40 days of consistent rain. In Autumn, Which begins on the 23rd or September is known for wet weather, and strong winds which normally make it feel like 14*c. By late September it is dry and sunny. In Spring, Which starts around the 21st of march, helps the cold weather roll in, it has a daily temperature of 9*C, 14*c in May, and 17*C in June. Spring is a very unstable season in the Tatras. In Winter, which starts on the 21st of December, the temperatures range from -5* to -10*C. Snowfall normally occurs during the beginning of December but later if the season has lower altitudes, the snow will thaw to frost. Cold air and fog will roll in and in the higher mountain ranges it is warm and sunny. 

Source: http://www.slovak-republic.org/weather/