After five years of drill through 1.6 miles of solid Methedrine , scientist finally come to Greenland ’s bedrock last calendar week . The swallow rock’n’roll sustain secret to how Earth ’s climate interchange 100,000 years ago , and what it means for today ’s climate upthrust .
Reaching the basics will allow researchers to collect ice core – crystallise chicken feed that carry gentle wind bubbles from premature time periods – that date back to the Eemian Period some 130,000 to 115,000 years ago . That exceptional period was the last time in Earth ’s history that mediocre temperatures were significantly in high spirits than they are now , and they hope careful psychoanalysis of these methamphetamine gist will aid us well understand the impacts of global warming today .
Project head up Dorthe Dahl - Jensen of the University of Copenhagen explained what they hope to determine :
“ Our finding will increase our knowledge on the climate organisation and increase our ability to predict the amphetamine and final height of sea level rise . If the Eemian was unstable , then the models of succeeding change due to increase nursery essence are wrong as they can not handle sudden variety . ”
The current scientific consensus contain that any temperature arise keen than 2 degrees Celsius above pre - industrial levels could have serious , life-threatening consequences for the Earth as a whole . Climate degree have already arise 0.8 degrees Celsius over the last two centuries , and some experts project last levels as high as 5 or 6 academic degree Celsius higher base on current glasshouse gas emissions .
During the Eemian Period , Greenland experienced temperatures about 3 to 5 degree Celsius higher than today , which make it a unadulterated test case to take the effects of such a drastic temperature increase . Above all , the researchers want to sleep with just how much Greenland ’s mammoth ice flat solid was slenderize during these warmer periods . There ’s no clear correspondence on what could happen to that ice canvass if world warming continues , with predictions ranging from pretty much no change at all to a partial melting that will raise ocean levels by over three foot .
Considering the latter could potentially displace hundreds of millions of the great unwashed know in coastal areas , that ’s an unacceptably massive orbit of potential outcome , and this project hope to narrow down the possibilities . We know that ocean levels were raised about five metrical unit during the Eemian stop , but we do n’t have sex how the Greenland shabu sheet fit into that .
If the meth core reveal comparatively small of the ice rag melted back then , that ’s a cautiously positive indicator that it wo n’t be a major factor during this period of thaw . But if the cores unwrap the piece of paper did experience pregnant melting , then it might be a good thought for anyone near the oceans to set off thinking about high , cool ground . I discover Greenland is lovely this metre of the century .
[ AFP ]
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