Antarctic Ice Sheet Plays A Major Role In Global Climate Change

Posted: Dec 14 2016, 7:13am CST | by , in News | Latest Science News

 
Antarctic Ice Sheet Plays a Major Role in Global Climate Change
Iceberg in the Weddell Sea is pictured. Credit: Mike Weber

Antarctic Ice Sheet Research Shows Climate Change with 8000 Years Record

A team of researchers recently revealed that Antarctic Ice Sheet is a big reason behind global and regional climate change. This study will also answer the question, that why Southern Hemisphere’s see ice increased even after Earth’s warming.

This research is done by scientists and paleoclimatologist from University of Cambridge. Michael Weber did this research with the help of his colleagues from Germany, USA, and New Zealand. The research recently published in the journal Nature.

According to Pepijn Bakker, initial years of global climate models were not successful in finding the exact amount of climate changes. Pepijn Bakker is a climate modeler at University of Bremen in Germany.

The researchers started their research from Scotia Sea, and found that Antarctic Ice Sheet passes through Scotia Sea that caused climate changes. Weber explained that the icebergs have gravel that settles deep in the ocean. The researchers studied 8000 years old deposits, including low and high deposits.

According to a hypothesis based research, the climate modelers more considered an element that shows climate changes during 8000 years. These changes occurred due to different phases, including long and short phases of Antarctic Ice mass loss.

The researchers used authentic computer modeling, and studied the changes in iceberg calving that caused temperature changes in the ocean.

A climate modeler from Oregon State University named Andreas Schmittner said that, the changes in Antarctic Ice Sheet happen naturally that causes change in temperature. Whenocean temperature gets high, it melts the ice sheet creating icebergs that leaves the ice sheet.

The researchers found the reason of sea ice expansion in the Southern ocean during increased temperature. Peter Clark,a Paleoclimatologist from Oregon State University said that, cold water decreases the salinity and surface temperature. So, cold water easily freezes and creates sea ice when temperature is high deep in the sea.

At the same time the fresh water also changes the temperature in the northern hemisphere after disrupting global ocean layers. This phenomenon was explained by Nick Golledge from the University of Wellington, New Zealand, who is co-author. Nick used a computer to see the changes in Antarctic ice sheet that happened several years back and are causing warm temperature in the present age.

According to Weber; Antarctic ice sheet went through changes more during past years. The researchers are concerned about future changes in the seal levels.

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