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Ice Caps Melting Essay, Research Paper

The Ice Caps Melting

Are global warming and the greenhouse effect causing the ice to melt and the

sea levels to rise. Antarctica and Greenland hold a good population of the world.s

ice in the ocean. The article, .Answers to sea level rise locked in ice. by

Jack Williams of USA Today, describes what is happening with the polar ice caps,

and how it is going to effect the world. Williams compares the amount of ice in

Antarctica to the size of .USA.s 48 contiguous states and half of Mexico..

Antarctica is a total of 5.4 million square miles. It has 91 percent of the

world.s ice and 70 percent of the globe.s fresh water. The worst-case

scenario would be all of Antarctica.s ice melting, which would raise the sea

level by about 200 feet. However, Antarctica is not said to become warm enough

to do this for well over hundreds of years.

Antarctica has two main sheets of ice that would pose a threat to the world:

the West Antarctic Ice Sheets and the East Antarctic Ice Sheets. Together the

East and the West ice sheets hold about 91 percent of the world.s glacial ice.

The west Antarctic ice sheet is south of the Pacific Ocean, and holds 11 percent

of the ice that sits on the continent, and is mostly below sea level. Therefore,

the west Antarctic ice sheet poses a bigger threat than the East because the

West.s bottom is mostly below the sea level. Every year ice spreads through

Antarctica and moves towards the edges. The ice from the West Antarctic sheets

moves mostly onto the Ross and Ronne ice shelves, which are floating on the

ocean. Williams says that if the shelves melt, it will cause large parts of the

ice-sheets to break off and melt into the sea. If the two ice sheets should melt

the sea level would rise 200-260 feet. This would endanger a large portion of

the population and reshape the world.s coastlines, as well as change the world.s

temperatures. The ice works as a cooling source for the world . without it the

summers would be increasingly hotter.

There are many scientists working in Antarctica trying to figure out how long

it will be for the ice sheets to collapse. There are satellites that can

determine the location of the ice and the ice.s pattern of movement. Drills

are also being used to look at the ice from the bottom up. This method allows

the scientists to see any changes in the ice due to the weather patterns that

have occurred over thousands of years ago. By studying these previous changes,

scientist can use their findings to make future hypothesis on the pattern of the

ice sheets. Is there more or less ice. And how much more or less. It was found

that the ice sheets are losing ice from around its edges. However because of the

constant snowfall and low temperatures, there has been neither large-scale gain

nor loss of ice.

The main reason that the ice glaciers of the world would melt is do to the

increasing temperature of the world. These increasing temperatures are caused by

global warming and the greenhouse effect. Technology and human activities such

as the burning of coal and oil raise the level of heat trapping gasses. It is

said that the twentieth century has been the warmest century in time do to the

increase of these human activities and if it continues to go on like this there

is no doubt that it will contribute to the melting of the ice caps. There are

too many people and too limited natural resources. .Experts have said for some

time that a warming atmosphere has caused many mountain glaciers around the

world to shrink,. found William Stevens of New York Times.

Greenland, the second largest land covered with ice (Antarctica being the

first), is having the same problems with losing its ice. These ice sheets cover

85 percent of the island. In Greenland snow falls all year long and the

temperature rarely rises above freezing, so almost none of the snow melts. The

mountains, which surround most of the coast of Greenland, block the ice from

reaching the sea. After many experiments scientists have discovered that

Greenland is losing ice around the edge of the ice sheets (USA Today). The

melting of ice in Greenland has not been as intensely studied as the melting of

ice in Antarctica, so at this point it is too soon to make any conclusions about

Greenland.s patterns of melting ice. Since there has been no past data o

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