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Did Ja Know?

After the solstice storm dropped over 10 inches of rain in some parts of western Lake Superior, the entire lake rose over 3 inches and nearshore phosphorus readings shot up 20 to 30 times their typical levels. (Dr. Elizabeth Minor, pers. comm.)

This is like adding over 2.5 million Olympic swimming pools of water and excessive amounts of plant fertilizer to the lake. National Park Service staff think this extra fertilizer, coupled with warmer-than-normal surface temperatures, fueled the highly unusual blue-green algae bloom sighted near the Apostle Islands in late July.


By Sea Grant Staff
July 2012

Return to July 2012 Seiche



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