“A swirling mass of Arctic air moved south into the continental United States in early January 2014. On January 3, the air mass began breaking off from the polar vortex, a semi-permanent low-pressure system with a center around Canada’s Baffin Island. The frigid air was pushed south into the Great Lakes region by the jet stream, bringing abnormally cold temperatures to many parts of Canada and the central and eastern United States.
When the cold air passed over the relatively warm waters of Lake Michigan and Lake Superior, the contrast in temperatures created a visual spectacle. As cold, dry air moved over the lakes, it mixed with warmer, moister air rising off the lake surfaces, transforming the water vapor into fog—a phenomenon known as steam fog.” Quoted from NASA’s Earth Observatory.
“This illustration depicts a concept for the possible extent of an ancient lake inside Gale Crater. The existence of a lake there billions of years ago was confirmed from examination of mudstone in the crater’s Yellowknife Bay area.”
“This photograph taken by an astronaut on the International Space Station highlights a late summer plankton bloom across much of Lake Ontario, one of North America’s Great Lakes. Microscopic cyanobacteria, or blue-green algae, can reach such large concentrations and color the water to such an extent that the change is visible from orbit.” Quoted from the Earth Observatory website.
Lake Vostok is a “lake” located about 2 1/2 miles below the surface ice of Antarctica. It has not had contact with the atmosphere for millions of years. DNA evidence recovered from drilling allows the possibility that “fish” might live in the lake.
National Geographic has an article that quotes other researchers who are skeptical about the DNA evidence.
“A 2011 record-breaking algae bloom in Lake Erie was triggered by long-term agricultural practices coupled with extreme precipitation, followed by weak lake circulation and warm temperatures, scientists have discovered.” Quoted from the National Science Foundation press release.
“A new video from the U.S. Geological Survey illustrates Lake Mead’s healthy and robust ecosystem and the aquatic science research and monitoring that happens on the lake.” Quoted from the USGS video release.
This isn’t geology… but a guy in Maine makes a living by finding ancient logs that have been on the bottoms of lakes – usually for centuries. He then hoists them up to his pontoon boat, tows them to a mill and saws them into exotic lumber that sells at premium prices.
Water levels on the Great Lakes were at December record lows last month, causing problems at some ports and requiring some cargo ships to lighten their loads.
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