Ice Everywhere: Great Freeze on the Great Lakes
March 5, 2014
At night, as cold settles in, lake ice creaks and groans. It’s been excessively cold, and I camped exposed on the snow-swept surface. Other than the lack of vegetation and the sounds at night, you’d never know you were on a lake. It feels like an empty plain. In some places, you see pressure ridges where ice has pushed into itself, sticking up like clear blue stegosaurus plates.
~ Author Craig Childs on Lake Superior
From the latest satellite photo, it looks like Lake Huron is 100% frozen with Superior & Erie 95% and Michigan somewhere in the 85% area. Ontario is looking like the slacker right now, and you can follow along and see daily satellite shots from NOAA.
The NASA Goddard Space Flight Center provided the quotation above and reported on the Great Freeze Over the Great Lakes saying (in part):
Scientists say it’s understandable that the Great Lakes have had so much ice this year considering the cold temperatures in the region that persisted through the winter. Cold air temperatures remove heat from the water until it reaches the freezing point, at which point ice begins to form on the surface, explained Nathan Kurtz, cryospheric scientist NASA’s Goddard Space Flight Center in Greenbelt, Md.
“Persistently low temperatures across the Great Lakes region are responsible for the increased areal coverage of the ice,” Kurtz said. “Low temperatures are also the dominant mechanism for thickening the ice, while secondary factors like clouds, snow, and wind also play a role.”
The freeze this year has local implications, including possible changes to snowfall amounts in the Great Lakes area, explained Walt Meier, also a cryospheric scientist at NASA Goddard. When the lakes are primarily open water, cold air picks up moisture from the relatively warm and moist lake water, often resulting in lake effect snow on the lee side of the lakes, on the eastern and southern shores. When the lakes freeze, the lake effect generally shuts down. “Although this year, they’re still picking up a fair amount of snow,” Meier said.
Lake levels could also see an impact by summer, as winter ice cover generally reduces the amount of water available to evaporate during winter months. If that turns out to be the case, it would be “good news for local water supplies, as well as for shipping and recreational use,” Meier said.
A 2012 study in the Journal of Climate by scientists at NOAA’s Great Lakes lab, which included data from MODIS, found that winter season ice cover on Lake Superior has decreased 79 percent from 1973 to 2010. The study also showed that ice cover on the lakes is highly variable and difficult to predict.
Today’s photo was taken on frozen Lake Michigan off the Leelanau shore by my friend and neighbor Cammie, co-owner of Epicure Catering. You can follow her at caterleelanau on Instagram for lots of wintertime fun and summertime food!
More ice on Michigan in Pictures!