Salt and the Great Lakes
Due to melting icebergs, I understand that the Great
Lakes are becomming salty. Is this true? Why? Thank you very much for
your time and trouble. Renata
The Great Lakes in recent history may have become saltier than they were in
the past, but there is not enough evidence yet to say that it is caused by
global warming (or melting polar icecaps).
The increase in salt concentrations for now is likely a result of lower
rainfall and snowfall in the areas around the lakes. All fresh water has
some salt in it, and the more a lake dries out, the saltier it gets.
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Update: June 2012