great lakes ice coverage history

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It can be used to identify averages, trends and record conditions. Decent early season ice coverage records date back to 1973. Monday, January 12, 2015, 7:51 PM - Winter sport enthusiasts can rejoice as a cold snap has pushed total ice coverage on the Great Lakes to double-digits. The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite acquired the top image of ice cover on North America’s Great Lakes on March 17, 2015. Looking year to year, things can swing wildly from a lot of ice to a little which is why forecasting ice cover in the Great Lakes every year is so important. Last Friday was the earliest date that all three Great Lakes already had ice since the better reporting of early season ice began. Great Lakes ice cover for February 11, in 2016, 2017 and 2018. “The Great Lakes have 9 times the ice coverage of last year at this time,” says reader Marque2. Even the climate itself is impacted by the ice overage. Average maximum ice coverage on the Great Lakes from 1973-2018. But ice cover also impacts the Great Lakes ecosystem and climate. It is very important to monitor and archive sea ice conditions of Canadian waters every year. 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. The bottom image shows ice cover a year earlier (March 16, 2014) when ice covered 75 percent of the lakes. What impacts do you think ice on the Great Lakes might have on the surrounding area? On that day, ice covered 55 percent of the lakes, according to the NOAA Great Lakes Environmental Research Laboratory. The Great Lakes - the world's largest group of freshwater lakes - were 78.9 per cent covered by ice on February 6, according to an analysis by … How to read an ice chart. NOAA GLERL's ice cover dataset extends from 1973 to present, serving the Great Lakes An average winter is about 55 percent. Lake Huron has actually seen a rapid increase in surface ice development during the last week. Great Lakes CoastWatch Node NOAA/Great Lakes Environmental Research Laboratory 4840 S. State Rd. Great Lakes ice cover decreasing over last 40 years A downward trend since the 1970s in the annual maximum extent of Great Lakes ice cover, which reaches a maximum every year during late winter and early spring, spells trouble for the Great Lakes ecosystem and the people who rely on it. GREAT LAKES ENVIRONMENTAL RESEARCH LABORATORY. The 2011-2012 ice cover maximum was approximately 5%, the lowest ever observed in the satellite era. These links to the Great Lakes Coastal Forecasting System -- Nowcast/Forecast pages include: current observed ice cover, wind, and air temperature; model-derived ice thickness, ice velocity, vessel icing, surface currents, and water temperature. This helpful guide explains the proper way to interpret ice conditions on our charts. In recent years, warmer surface water temperatures in the Great Lakes have contributed to lower water levels by increasing rates of evaporation and causing lake ice to form later than usual (see the Lake Ice indicator), which extends the season for evaporation. Great Lakes Ice Cover Observations Lake Erie Vertical Temperature Mooring (2017) links to NCEI archive Lake Huron Vertical Temperature Mooring (2012-2019) links to NCEI archive Large interannual and decadal The Great Lakes ice coverage this winter is nearing record 1979 levels, when nearly 95 percent of the water was frozen solid. A downward trend since the 1970s in the annual maximum extent of Great Lakes ice cover, which reaches a maximum every year during late winter and early spring, spells trouble for the Great Lakes ecosystem and the people who rely on it. These far-reaching impacts emphasize the need for continued monitoring and modeling of the Great Lakes as our climate continues to change. community in research, application, and management. This year on Feb. 8, ice coverage of the Great Lakes was at 54 percent, the NWS reported. In particular, the middles of Lakes Ontario and Lake Michigan remain on average 80-90% ice-free at winter maximum. Satellite data Teasing out how much of the trend is due to each influence is challenging, however. 9.5% ice coverage in 2002 is the lowest on record. Ice coverage on the Great Lakes reached 85.4 percent on Feb. 18, marking the second winter in a row that ice coverage has exceeded 80 percent. The Detroit Army Corps of Engineers has kept records of Great Lakes ice coverage going back to 1973. “And 33 times that of two years ago.” Here are comparison maps of ice concentration on Lake Superior. Shoreline structures can be damaged. Was off by 33% in coverage in 48 hour forecast period. Large interannual and decadal variability are observed, as well as a downward trend. On the bottom is a time series of the annual maximum ice cover averaged over all of the Great Lakes from 1973 to 2018. 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. Typical ice condition charts. University of Oklahoma Press. Studies in the Lake Superior region indicate that a river system and valleys formed by water erosion existed before the Ice Age. Beginning in 1989, the U.S. National Ice Center produced Great Lakes ice cover charts that combined both Canadian and U.S. agency satellite imagery. The seasonal evolution of ice cover on all of the Great Lakes follows a relatively consistent schedule. The decline of ice cover on the Great Lakes is best explained by a more sudden shift to less ice as opposed to a gradual decline (Mason et al 2016 and Van Cleave et al 2014). “And 33 times that of two years ago.” Here are comparison maps of ice concentration on Lake Superior. Although the reason for the shift is not completely understood, Lake Superior's and Huron's shifts coincide with a strong ENSO event occurring in 1998. Typical ice condition charts. With shorter winters and op… Similar ice coverage is reported on the four other Great Lakes. Forecast period ice on the Great Lakes already had ice since the better reporting of early season began... The highest on record since 1979 on little ice floes, jumping into the lake in the ice delaying and. This close was in 1996, when 94 percent of the annual maximum cover! Ecosystem and climate s Great Lakes follows a relatively consistent schedule 's ice coverage date... 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