a slowly moving mass or river of ice formed by the accumulation and compaction of snow on mountains or near the poles.
a gradual increase in the overall temperature of the earth's atmosphere generally attributed to the greenhouse effect caused by increased levels of carbon dioxide, chlorofluorocarbons, and other pollutants.
Temperatures are increasing - the 10 warmest years on recorded were during 1997-2008 - The rising temperatures that was observed since 1978 is important because the rate of increase is so high and because, during the same time, the energy reaching the Earth from the Sun had been measured enough to conclude that Earth's warming was not due to changes in the Sun.
Sea levels are rising - Global sea level has been increased by 8 inches over the past century. - Global warming causes sea level rise in two ways 1) the ocean water is expanding as it warms 2) the land-based ice in glaciers and ice sheets are melting
Sea ice is melting - Recent observations have indicated since 2009 that the ice has been much thinner than is used to be - Covering an average of 9.6 million square miles, these areas of ice floating on ocean waters is very important in regulating our climate, by reflecting some sunlight back to space - Which in can affect the life cycles of many polar species, such as polar bears, seals, and walruses.
- Glaciers are large mounts of ice that are tightly packed due to pressure and gravity forces
-When a glacier moves down a mountain, it takes everything with it, due to it's large amounts of heavy snow
-A glacier forms over many years, when the snow builds up faster than it's removed
-The study of glaciers is called glaciology
-Around 10% of the earths land surface is covered by various types of glaciers
-Perito Moreno Glacier, Argentina
-Margerie Glacier, Glacier Bay, Alaska
-Furtwängler Glacier, Mount Kilimanjaro, Tanzania
-Pasterze Glacier, Austria
-Fox Glacier and Franz Josef Glacier, New Zealand
-Biafo Glacier, Pakistan
-Canada Glacier, Antarctica
-Yulong Glacier, China
-Glaciers in arabic: الأنهار الجليدية -Global warming in Arabic: ظاهرة الاحتباس الحراري -There is more carbon dioxide in the atmosphere today than at any point in the last 800,000 years.
- Since 1870, global sea levels have risen by about 8 inches.
- In total, the U.S. emits approximately 6 billion tons of carbon dioxide every year. 40% of that comes from power plant emissions alone.
- In total, the U.S. emits approximately 6 billion tons of carbon dioxide every year. 40% of that comes from power plant emissions alone. Glaciers store about 75 percent of the world's freshwater.
-Glacier ice crystals can grow to be as large as baseballs.
-If all land ice melted, sea level would rise approximately 70 meters (230 feet) worldwide.