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Climate change is changing Swiss lakes


Climate change is changing Swiss lakes
Eawag: Swiss Federal Institute of Aquatic Science and Technology
Dübendorf, 18.02.2021 - A new simulation study shows that climate change risks significantly altering water temperature, ice cover and mixing of many Swiss lakes. Mid altitude lakes are especially under pressure, running the risk of completely losing ice cover and no longer fully mixing twice per year. Such a change would have fundamental consequences for the functioning of lake ecosystems.
Lakes are subject to strong seasonal cycles. In many Swiss lakes at medium and high altitudes, the water mixes from the surface to the bottom in spring and fall. These vertical overturn events influence many chemical and ecological processes. Oxygen rich and nutrient poor water from the surface mix with oxygen-depleted and nutrient-rich waters from the deep water. At the same time, the lake temperature is homogenized over the entire depth. In winter a ....

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7 of the world's most stunning natural ice rinks


7 of the world’s most stunning natural ice rinks
Whether you’re like Bambi on ice or Torvill and Dean, come winter you can skate across these incredible natural ice rinks
1. Rideau Canal Skateway, Canada
Rideau Canal Skateway, Canada (Shutterstock)
Opened in 1971, this UNESCO World Heritage Site in Ottawa is the world’s largest naturally frozen ice rink which is maintained daily – at 7.8km long, it’s equivalent to 90 Olympic-sized hockey rinks.
The 24-hour free rink is illuminated at night and open every January to March.
As well as skating to music, you can also watch ice hockey, curling and speed skating competitions. ....

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