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The Polar Ice Caps
Transcript of The Polar Ice Caps
3% fresh water is coverered in glaciers and the polar ice caps which hold 68.7% of the world's fresh water IS GETTING HOTTER The polar ice caps and glaciers are melting By: Rida Aamer - 821 The Melting of the
Polar Ice Caps Main Factor Behind Melting CLIMATE CHANGE The gradual increase in the temperature of the earth's atmosphere, believed to be due to the greenhouse effect, caused by increased levels of carbon dioxide, chlorofluorocarbons, and other pollutants. Raised temperatures Average temperatures in the Arctic are going up twice as fast as the rest of the world's climate Polar and glacier ice melting, thinning, and cracking Ice Melting Sheet of ice covering and protecting the Arctic from the Sun's rays is disappearing Cool Layer Disappearing More Heat Being Absorbed The Earth is absorbing much more of the Sun's rays with the layer of ice and snow now gone A CONTINUOUS CYCLE The Canadian Basin is the largest subbasin of the Arctic Ocean A major cap of fresh water is floating above the saltwater Canadian Basin And is coming from Canadian permafrost meltwater filtering in through rivers Freshwater is held in place by wind Without wind, this water would disperse Straight into the Gulf Stream Gulf Stream Warm, powerful and swift Atlantic current
Crosses the Atlantic
Heavily influences weather across Eastern North America and Europe Thermohaline Circulation Refers to how the Gulf Stream is controlled
Circulation depends on density levels of the water
Levels fluctuate depending on freshwater vs. saltwater levels THEREFORE: Added freshwater causes distruptions in circulation Locations of currents affects areas closest to it
Gulf Stream keeps Europe mild, Florida warm, and Newfoundland cold
Added freshwater in the Gulf Stream changes salinity levels
Could possibly change path of the Gulf Stream Europe would get colder
Florida would get colder
Newfoundland may get warmer If the Gulf Stream changes: If the Canadian Basin Overflows: Gulf Stream would change directions
Cause a chain reaction with surrounding currents
The world's current systems would change In Conclusion Polar ice caps are shrinking
Freshwater, if mixed with the oceans, could have long lasting damage
Ocean currents could end up changing directions
The climates they control would fluctuate drastically Thank you