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By Kaitlyn, Mandy and Oviya

Mandy Au

on 3 December 2013

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Transcript of Glaciers

Article Summary
Background Information
Glaciers are actually always in movement. The pressure of the overlying ice causes it to move very slowly.
Most of the world's glaciers are found in the north and south poles, but they still exist in all continents including Africa.
The largest glacier, the Lambert glacier, is located in Antarctica.
The Lambert glacier is 5 times larger than the state of Nebraska.
Alaska has around 100,000 glaciers
Not all glaciers make icebergs
They are thousands of feet thick and weigh millions of tons
As long as it snows, the glacier grows, the warmer it gets, the more it melts
Warm air = glaciers shrink
Is there bias?
More Background Information
About one tenth of the earth is covered in glaciers
In the polar regions (Antarctica), glaciers exist as small sheets of ice
Holds approximately 75% of the world's fresh water supply
If all the glaciers melted, the sea levels would rise more then 50 meters; coastal cities would be submerged
Most of the time, glaciers form in cold places
Snowflakes are like the building blocks of glaciers
Several valley glaciers often combine to form larger glaciers
Constantly loses and gains ice
In the zone of accumulation, more snow gathers in the winter then it melts in the summer
Zones of the glacier that lose snow are called zones of ablation
The term calving is used when a part or parts of a glacier break off; pronounced as "cave-ing"
Valley glaciers and Ice sheets are the 2 main kinds of glaciers

By: Kaitlyn, Mandy and Oviya
Source Citation

There is bias in this article because it only states the fact that the ice sheet has dramatically and that the sea level is rising which are both negative points.
Causes of Glacial Melting
Glaciers calve and break into ice bergs because of global warming. Global warming is caused by green house gases, having too much CO2 in the air, and burning fossil fuels.
In this article, it states that the Antarctic ice sheet's mass has decreased significantly from 2002 to 2005. The people that conducted the study estimate that the mass loss would be enough to raise the sea level by 1.2 millimetres. They found out that Antarctic's ice sheet was losing about 152 cubic kilometres a year between April 2002 and August 2005. A cubic kilometre is a trillion litres, so that would be about 152 trillion litres a year.

A 150 feet meltwater channel carved it's way into the Greenland Ice Sheet. An obvious sign that glacial melting is in effect.
An iceberg.
YouTube Videos
The video above is a video of the largest calving ever recorded. The video to the right is about the Himalaya melting.

This picture shows that back in 1904, there was once a glacier there. Then in 2004, the glacier has completely disappeared without leaving a trace of ever being there.
Fun Facts
Valley glaciers are also known as "Rivers of Ice" because they follow the paths originally formed by rivers.
The front side of the glacier is called the "snout"
The Antarctic ice sheet is actually a big sheet of ice that has been in existence for at least 40 million years.
During the last ice age, glaciers covered about one third of the earth's surface.
When pieces of glaciers calve off and float away, they are called ice bergs.
The sinking of The Titanic was because the ship had crashed into a glacier.
The picture on the left is a picture of an ice sheet. The picture below is a picture of a valley glacier.
An ice cap; another type of glacier.
Our Opinion
We agree with the article because global warming is getting rid of our glaciers and we think that we should do something so our water levels don't rise too high. And in our opinion, there are no good sides to glacial melting.
Thanks for listening!
Full transcript