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Effects of melting glaciers


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Effects of melting glaciers

  1. 1. Effects of Melting GlaciersAndrew BakerGroup 2
  2. 2. Importance of Glaciers• Help to keep the Earth cool• Contain most of theavailable drinking water onEarth• Provides a habitat for manyanimals• Should the glaciers continueto melt, everything will beaffected•
  3. 3. Glacial Melting• Almost everything in ourworld is threatened• Viscous cycle• Due to global warming• Causes global warming• Albedo•
  4. 4. Understanding AlbedoAlbedo and Glaciers:• A scale from 0-1• 0 = none reflected, 1 = all• Glacial ice averages a 0.8• Smaller and fewer glaciersallow for more area oflower albedo to be exposed• Allows for the Earth tobecome less cool, morewarmWhat this Means:• Warmer planet increasesthe temperature of the seawater• Also puts more water intothe sea• Sea water expands• Sea water rises• If all the ice melts, expect arise of 70 meters (230 feet)
  5. 5. Fresh Water ShortageSome Percentages:• Earth is roughly 70% water• 1.7% of that is fresh water• 68.7% of that comes fromglaciers•
  6. 6. Fresh Water Shortage• Melting glaciers allow freshdrinkable water to enter andmix with sea water• No longer fresh, or drinkable• Drinkable water is renewedthrough precipitation—lessfalling and freezing on theglaciers•
  7. 7. Reduced Agricultural Output• Dry seasons become dryer• Land becomes unsuitable• Crop output less• Food grain shortages• Less grains for cattle, pigs, etc.• Experts already expecting a foodshortage issue due to populationsrising• Do not take into account less foodgrown••
  8. 8. Electricity Shortages• When the glaciers are gone,the rivers they feed dry up• No water = no hydroelectricpower• Need to adopt a new powersource• Further pollute the Earth• Leads to global warming•
  9. 9. Excessive Flooding• Sea level rises• Rapid increases in waterinput into rivers• Formation of new lakes• Lakes keep growing in size• Lakes burst and destroyeverything in their paths•
  10. 10. Sea Level Rise• Increasing at an increasing rate• Currently 1 mm—2 mm peryear• Floods will cause coastalregions to relocate• Soil erodes—new coastal areasare formed• Coastal ground watercontaminated• New coastal regions need torelocate or find new drinkingwater• Felt first in American and Asiancontinents••
  11. 11. Sea Level RiseHabitats will be lost:• Glacial water plants die• Fish that consume the plantsdie• Birds die, no fish• Wetlands will vanish, new onesto be formed• Coral reefs vanish• Not enough sunlight reaches• Deteriorates or kills coral• Fish die, people need new foodsource•
  12. 12. Contamination• DDT and other pesticidesreleased• Naturally stored in glacial ice• Gets into air and water,absorbed by soils• Quickly moves around theplanet• Egg shell thinning—leads topopulation declines• Diabetes, many cancers,developmental andreproductive problems•
  13. 13. Summary• Glaciers are important!• Melting glacierscontributes to:– Fresh water shortages– Reduced agriculturaloutput– Electricity shortages– Excessive flooding– Sea level rise– Loss of habitats– Contamination•