Ice Caps Melting Facts
According to the National Snow and Ice Data Center, there are two ice sheets in the world that cover Antarctica and the majority of Greenland. These two ice sheets contain 99 percent of the freshwater ice on our planet. The Antarctic Ice Sheet measures approximately 5.4 million square miles, and the Greenland Ice Sheet measures 650,000 square miles. Sea levels would rise 20 feet if the Greenland Ice Sheet melted and 200 feet if the Antarctic Ice Sheet melted. This would result in coastal flooding of the most powerful economic cities on the face of the Earth, including New York City.
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Climate Change's Effect
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Between 1796 and 2006, summer melting of the Greenland Ice Sheet increased by 30 percent as a result of a warmer climate, according to the National Snow and Ice Data Center. The temperature of the Antarctic Peninsula has increased by 2.5 degrees Celsius since 1950.
Effect on Global Temperature
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The polar ice caps play an extremely important role in regulating the temperature of our planet. Eighty percent of the sunlight that strikes the polar ice caps is reflected back out of our atmosphere. If the ice caps disappeared, this energy, in the form of sunlight, would be absorbed by the ocean, which ultimately would result in significantly warmer ocean temperatures. According to The Harvard Medical School Center for Health and The Global Environment, warmer temperatures will lead to frequent and more intense extreme weather events.
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Effect on Arctic Ecosystems
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According to the Natural Resources Defense Council, the melting of ice caps has had a devastating effect on ecosystems within the arctic region. For example, the Ward Ice Shelf once contained a unique freshwater lake. However, after it splintered due to melting, the lake and the ecosystem it contained drained into the Arctic Ocean. As a result, polar bears, seals, walruses and whales were forced to migrate to different regions in search of food. This made it difficult for native people to hunt these animals, thus making it more difficult for them to survive.
How Fast Are Sea Levels Rising?
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According to the National Aeronautics and Space Administration, average global sea levels were rising at a rate of 1.7 millimeters per year between 1870 and 1933 due to the melting of ice caps. However, global sea levels have been rising at a rate of 3.33 mm per year since 1993, which is almost twice as fast.
The Ozone Hole's Effect
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According to NASA, "ozone hole" is a term used to describe the depletion of the ozone layer in Earth's atmosphere. The ozone hole is caused by human-created compounds that release bromine- and chlorine-based gases into the air. Ozone protects the Earth from harmful UV rays from the sun and also keeps the temperature of our planet down. The ozone hole above Antarctica is one of the largest ozone holes in the world, which has resulted in warmer temperatures in the region.
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