1.Glaciers begin life as snowflakes. When the snowfall in an area far exceeds the melting that occurs during summer, glaciers start to form. The weight of the accumulated snow compresses the fallen snow into ice.http://ga.water.usgs.gov/edu/earthglacier.html 2.Even though the amount of water locked up in glaciers and ice caps is a small percentage of all water on (and in) the Earth, it represents a large percentage of the world's total freshwater. http://ga.water.usgs.gov/edu/watercycleice.html 3.Yes, because glacier ice is water occurring in a natural state, glacier ice harvesters can apply for either a water right or a temporary water use permit to get authorization to harvest glacier ice. Glacier ice is currently harvested from tidewater-calving glaciers in Alaska. http://dnr.alaska.gov/mlw/water/glacier.cfm | 1.Ice caps form like other glaciers. Snow accumulates year after year, then melts. The slightly melted snow gets harder and compresses. It slowly changes texture from fluffy powder to a block of hard, round ice pellets. New snow falls and buries the grainy snow. The hard snow underneath gets even denser. It is known as firn.http://education.nationalgeographic.com/education/encyclopedia/ice-cap/?ar_a=1 2.Even though the amount of water locked up in glaciers and ice caps is a small percentage of all water on (and in) the Earth, it represents a large percentage of the world's total freshwater. http://ga.water.usgs.gov/edu/watercycleice.html 3.Yes, because glacier ice is water occurring in a natural state, glacier ice harvesters can apply for either a water right or a temporary water use permit to get authorization to harvest glacier ice. http://dnr.alaska.gov/mlw/water/glacier.cfm | 1. Sea ice is frozen seawater. Because ice is less dense than its melt, sea ice floats http://en.wikipedia.org/wiki/Sea_ice 3.New ice is usually very salty because it contains concentrated droplets called brine that are trapped in pockets between the ice crystals, and so it would not make good drinking water. http://nsidc.org/cryosphere/seaice/ | 1.Icebergs form when chunks of ice calve, or break off, from glaciers, ice shelves, or a larger iceberg.http://nsidc.org/cryosphere/quickfacts/icebergs.html 2.Even though icebergs are floating in salt water, the ice has no salt. It's compressed snow. If you melted an iceberg you would get drinkable fresh water after you killed any germs. http://www.freedrinkingwater.com/water_quality/quality1/13-08-icebergs-for-drinking-water.htm 3. The concept of using icebergs as a water source has been around for a long time and commonly is seen to lie in the realm almost of science fiction but not quite; it has always been seen as something that is vaguely possible one day in the not too far distant future. Even though icebergs are floating in salt water, the ice has no salt. It's compressed snow. If you melted an iceberg you would get drinkable fresh water after you killed any germs. Icebergs have never been used as a major source of drinking water because of the costs and risks associated with moving them.http://www.freedrinkingwater.com/water_quality/quality1/13-08-icebergs-for-drinking-water.htm |
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