great lakes ice coverage history

What factors impact ice coverage on the Great Lakes? A big freeze hit the region right at the end of the shipping season, causing problems for several of the region’s biggest industries. Despite this fairly consistent seasonal pattern, some lakes are losing ice cover faster than others. Whitefish, for instance, use the ice cover to protect its eggs from big winter storms, which rile up the water. This variability occurs due to the randomness of the weather, but also larger climate patterns like the El Niño Southern Oscillation (ENSO), North Atlantic Oscillation (NAO), Atlantic Multi-decadal Oscillation (AMO) and the Pacific Decadal Oscillation (PDO). Ice cover on the Great Lakes can vary widely from one year to the next. Great Lakes ice cover facts since 1973 94.7% ice coverage in 1979 is the maximum on record. Back to the main GLERL ice page, NOAA - Great Lakes Environmental Research Laboratory, Office of Oceanic and Atmospheric Research (OAR). The Great Lakes have warmed faster than the nearby air temperature in recent years. According to the Great Lakes Environmental Research Laboratory, 0.1% of the Great Lakes is covered with ice. The 2011-2012 ice cover maximum was approximately 5%, the lowest ever observed in the satellite era. Fish spawning can be impacted. Source: Great Lakes Environmental Research Laboratory. Atlas of Great Lakes Indian History. As of February 11, 69.1 percent of the Great Lakes were ice covered, according to data from NOAA's Great Lakes Environmental A mild winter has kept ice coverage on the Great Lakes well below average this year, according to the Canadian Coast Guard. is combined with other sources to translate daily ice charts into a pixel grid of percent The Great Lakes certainly do, with ice coverage at its highest percentage in 35 years, according to scientists from the Great Lakes Environmental Research Laboratory in Ann Arbor, Mich. Large interannual and decadal variability are observed, as well as a downward trend. Animation of Historical Great Lakes Ice Cover NOAA GLERL's ice cover dataset extends from 1973 to present, serving the Great Lakes community in research, application, and management. It is very important to monitor and archive sea ice conditions of Canadian waters every year. Data is from the U.S. National Ice Center and Canadian Ice Service. Great Lakes ice cover continues to increase. This color-enhanced imagery from the Suomi NPP satellite's VIIRS instrument shows ice cover on the Great Lakes on February 12, 2018. In that time, the lakes have surpassed 80% ice coverage a mere five times. Great Lakes CoastWatch Node NOAA/Great Lakes Environmental Research Laboratory 4840 S. State Rd. The Great Lakes as a whole are now down to 73 percent coverage. According to the records I have, that’s the 9th highest extent in the 47-year satellite record. Last week in a 2 day period NOAA’s Great Lakes Ice model for Lake Superior showed ice decreasing but is gained ice. Ice actually has a considerable impact. Great Lakes ice coverage is significantly lower than last year Photo showing the Great Lakes Ice Coverage taken on Feb. 16, 2020. (Feb. 19, 2019) Then, additional chilly weather stopped the thaw and led to rapid ice … An average winter is about 55 percent. Large interannual and decadal 30-year average ice condition graphics for the Arctic, Hudson Bay, East Coast, Great Lakes Since 1973, the maximum ice cover over all of the Great Lakes was 95% in 1979, while the minimum during this period was only 1 1% in 2002. Studies in the Lake Superior region indicate that a river system and valleys formed by water erosion existed before the Ice Age. Declining winter ice cover is the largest driving factor. However, while the yearly (and even the five-year running average) can be different from year to year (or decade to decade), the trend in ice cover over all of the lakes since 1973 is downward. The decreasing maximum ice extent of Great Lakes ice is due to a combination of natural climate influences as well as influences from man-made climate change. community in research, application, and management. The translated total loss in lake ice over the entire 38-yr record varies from 37% in Lake St. Clair (least) to 88% in Lake Ontario (most). That frigid year, the Great Lakes together reached 92% ice coverage, during which Lake Erie and the Straits of Mackinac (the region between Lakes Michigan and Huron) completely froze over and Lakes Huron and Superior nearly froze over. The total loss for overall Great Lakes ice coverage is 71%, while Lake Superior places second with a 79% loss. Decent early season ice coverage records date back to 1973. Less ice on the Great Lakes means more open water and moisture that can be picked up and turned into lake effect precipitation for downwind communities. Shipping is shut down for a part of the year. This helpful guide explains the proper way to interpret ice conditions on our charts. All of the lakes begin to see ice develop along the shallower coasts during late fall and early winter before ice begins to expand in coverage from north to south across the Lakes throughout the winter. In contrast, Lake Erie, a shallower lake, is normally over 70% ice covered by late winter. Similar ice coverage is reported on the four other Great Lakes. The U.S. and Canadian Coast Guards have assisted over 300 ships this winter, one of the most demanding years for icebreaking. A familiar view for many who live and play around the Great Lakes graces the current cover of National Geographic – a stormy sunset over Lake Michigan, seen from the sandy beaches of the Sleeping Bear Dunes National Lakeshore. 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