# Global Warming

Submitted By erreka10
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Global Warming
February 21, 2011
Erreka Sheppard 6. Global Warming If the global climate were to warm significantly as a result of the greenhouse effect or other climatic change, the Arctic ice cap would start to melt. This ice cap contains the equivalent of some 680,000 cubic miles of water. More than 200 million people live on land that is less than 3 feet above sea level. In the United States several large cities have low average elevations. Three examples are Boston (14 feet), New Orleans (4 feet), and San Diego (13 feet). In this exercise you are to estimate the rise in sea level if the Arctic ice cap were to melt and to determine whether this event would have a significant impact on people living in coastal areas. (a) The surface area of a sphere is given by the formula where r is its radius. Although the shape of Earth is not exactly spherical, it has an average radius of 3960 miles. Estimate the surface area of Earth. The surface area of a sphere is found by using the following formula: s = 4r2, where s represents surface area and r represents radius. To find the approximate surface area of the Earth, the equation would be set up as follows: S = 439602 = 197060797.4 This calculation shows that the approximate surface area of the Earth 197060797.4 square miles. (b) Oceans cover approximately 71% of the total surface area of Earth. How many square miles of Earth’s surface are covered by oceans? To calculate how many square miles of Earth’s surface are covered by oceans one must multiply the approximate surface area of the Earth, 197060797.4 by the percentage covered by water, 71%. This is set up as follows: 197060797.4 * .71 = 139913166.2 This calculation shows that approximately 139913166.2 square miles of the Earth’s surface are covered by oceans

(c) Approximate the potential rise in sea level by dividing the...

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