Well, of course most of the water that leaves the Great Lakes is lost by evaporation.
which is a scientific analysis of water loss of the Lakes (combined with net extraction for irrigation, drinking water/exported water, whatever), vs blaming 'man-made climate change'. (which isn't mentioned at all in my linked article, btw)(note: I thought the part of the story about draining the lakes for chinese bottled water was amusing, not a basis for anything related to lake levels)
I don't know enough about the Lakes to have any discussion on details/history, but this Feb. 5, 2013 News Release by the Army Corps of Engineers affirms that stated in the article and appears to the the source for the statement.
Lake Michigan-Huron sets all-time record for lowest monthly water level DETROIT -- The U.S. Army Corps of Engineers, Detroit District through its Great Lakes Hydraulics and Hydrology Office reports a preliminary new record low water level for Lake Michigan-Huron for the second month in a row. The new record low of 175.57 meters or 576.02 feet is not only the lowest January monthly average water level ever recorded, but also the lowest monthly average ever recorded for any month over the official period of record for Great Lakes water levels, which extends back to 1918. The Corps issues water level forecasts for the Great Lakes in coordination with Environment Canada, andwith the use of water level data and forecasting models developed by the National Oceanic andAtmospheric Administration's Great Lakes Environmental Research Laboratory and National OceanService. The Corps latest forecasts indicate a strong likelihood for continued record lows on LakeMichigan-Huron over the next several months. Water levels on the remaining Great Lakes are expected to remain below their respective long-term average water levels, but above record lows.
“Not only have water levels on Michigan-Huron broken records the past two months, but they have been very near record lows for the last several months before then. Lake Michigan-Huron’s water level shave also been below average for the past 14 years, which is the longest period of sustained below average levels since 1918 for that lake” said John Allis, Chief of the Great Lakes Hydraulics and Hydrology Office at the Corps, the office that monitors Great Lakes water levels.
The current record low water levels on Lake Michigan-Huron are the result of lower than averagesnowfall during the winter of 2011-2012, coupled with the very hot and dry summer. Together theseconditions led to only a 4 inch seasonal rise of Lake Michigan-Huron in 2012, compared to an averagerise of 12 inches. Also, evaporation was significantly above average during the summer and fall monthsand contributed to a very rapid seasonal decline.
If the Army Corps of Engineers is wrong, take it up with them. Not suggesting fact or fraud; not my backyard. But I find the scientific analysis of evaporation from the Lakes interesting (when not coupled with hype about AGW).
One of the commenters at the poster's article makes the following question:
If the US and Canada agreed to take one trillion gallons of the world's freshest water directly out of Lake Superior and sell it on the global market (just assume there is one), by how much will this singular action drop the level of the lake?
Anyone wanna have fun with that??? Seriously...after looking at the Corps' historical charts, I think it's a good question.../s
I understand very clearly the cycles of the lake, understand the complexities of the watershed, but your original article was wrong, plus the water has been headed on an upward cycle for over a year now. This year it is likely to have a major rise in level because of the cold winter, and the amount of precipitation in the watershed area.
My "the lake is receding because of global warming" neighbors are deeply saddened......