worldiceshelves

= The effect of global warming on the poles =

==== The world has been heating up. In some arias it is effected more then others. The Polar regions are ware climate change is having the most visible impact. The sea ice in the Arctic has declined drastically in the last 30 years! That's a lot. The Northwest passage was ice free for the first time in history in 2007. Several ice shelf's have broken off. ====
 * = = Antarctic = ||= = Arctic = ||
 * = === .Larsen B === ||= === .Ayles === ||
 * = === .Wilkins === ||= === .Serson === ||
 * =  ||= === .Markham === ||
 * =  ||= === .Ward Hunt === ||

This is a table of the ice shelf's that have broken off in the Arctic and the Antarctic.
==== Permafrost (permanently frozen ground) is thawing. The Melting is making //__**green house gasses**__// rise creating more temperature rise. The thawing of the permafrost is affecting the forest the trees are literally falling out of the ground. ==== ==== Due to the changing climate and the melting permafrost. Animals that live hear are having a lot harder time. Walruses are having a harder time as they rely on the sea ice floating close to land. As this sea ice disperses walrus pup drown at sea. The Arctic Fox is loosing its territories. The permafrost is melting its getting warmer the Red Fox can live in the climate and are advancing up. And Emperor Penguins in the Antarctic are diapering. By the end of the century 95% of them will be gone. ====

http://wwf.panda.org/about_our_earth/aboutcc/problems/impacts/polar_melting /


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= What is currently happening in Greenland due to Global warming =

Greenland despite its name is majority ice and permafrost. Its also a huge bit of fresh water.
==== Frozen fresh water is in the form of millions of cubic meters of ice in Greenland. Sealers and whalers at Qaanaaq say that __//**ice is 1 meter thinner now then it used to be.**//__ In cretin areas of the country glacier heads that have been there for so long are pulling back. Ice ==== ==== fjord near Ilulissat pulled back 10 km (6 miles) between 2001 and 2004. Our fresh water supply is at risk. __//**If the ice in Greenland all melts the ocean will rise by 6-7 meters.**//__ Though on the bright side new ice is being made thanks to the efforts of people trying to fix what has been done. ====

http://www.greenland.com/en/about-greenland/nature-climate/climate-changes/
= = = = = What Scientists learn from drilling Ice cores =

==== The ice sheets have one special property. __//**It allows us to go back in time and sample accumulation, air temperature, and air chemistry from another time**//__. Ice cores allow us to generate reconstructions of past climates. We can go back at least 800,000 year. __//**We can also look at concentration of greenhouse gasses.**//__ Ice core drilling has been around since the 1950's and there has been drilling wold wide but mostly in Greenland and Antarctica. ====

==== Scientists compare and contrast the green house gasses to the past years. The bubbles that can be found in ice cores contain direct samples of the world's ancient atmosphere using these ice cores is how scientist know about past glacial-inter glacial cycles, changing atmospheric carbon dioxide levels, and climate stability from the last 10,000 years. ==== http://www.antarcticglaciers.org/glaciers-and-climate/ice-cores/ice-core-basics/ = =