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GL / Climate / Temperature

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Last updated in September, 2000

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	Lake Water tends to increase in temperature during Summer season. This indicates that it is storing up extra energy from the atmosphere. It acts as a heat sink throughout the Summer. In the winter, however, there is less radiation from the Sun. Then, lakes become a heat source, giving up their energy to the atmosphere. These seasonal changes of temperature dramatically affect the condition of Great Lakes' climate.

	1. Which of the Great Lakes has the greatest impact on temperatures in both July and January? Why? 2. Do you think about temperature differences occur seasonally in oceans, too? Do oceans act as heat sources or sinks? 3. Do continents ever act as heat sources?

	1. EP-083 ES-EAGLS: Great Lakes Climate & Water Movement 2. EP-078 Global Change in the Great Lakes 3. EP-081 The Great Lakes Solution Seeker 4. R/ES-2-PD Spectral Transmittance of Sunlight through Great Lakes Ice and Snow Covers

	* On-line activity: How does the temperature of the Great Lakes change over time? 1. Activities for the Changing Earth System Freshwater for a Warmer World How do Greenhouse Gases affect Heat Absorption? 2. LAKERS (Lake-Aware Kids Engaged in Relevant Science What causes the shoreline to erode? How is today’s weather related to the “Big Picture” of weather? 3. The Great Lake Erie 4. The Effect of Lake Erie on Climate 4. Great Lakes Instructional Materials for the Changing Earth System How do greenhouse gases affect heat absorption? 5. Earth Systems - Education Activities for Great Lakes Schools (ES-EAGLS) Climate and Water Movement What happens to heat energy reaching the Great Lakes? What causes the land-sea breeze? How do the Great Lakes affect temperature? How is weather influenced by the Great Lakes? How do storm surges affect water levels on Lake Erie? How do the Great Lakes change through the seasons? What factors impact ice coverage on the Great Lakes?
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	Source: Great Lakes Atlas: Climate

	Source: Great Lakes Surface Environmental Analysis (GLSEA)

	1. Great Lakes Forecasting System http://superior.eng.ohio-state.edu/ 2. Current Climate Situation in the Midwest http://mcc.sws.uiuc.edu/figures.html 3. Great Lakes Atlas: Climate http://www.epa.gov/glnpo/atlas/glat-ch2.html#2 4. CoastWatch - Lake Surface Temperature Reporting System: Michigan Seagrant http://www.coastwatch.msu.edu/ 5. Great Lakes Surface Environmental Analysis (GLSEA) http://coastwatch.glerl.noaa.gov/glsea/glsea.html

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