Notícia 1, tercera avaluació

Antarctica’s iceberg graveyard could reveal the ice sheet’s future

In the Scotia Sea, many of the icebergs escaping from Antarctica begin to melt, depositing sediment from the continent that had been trapped in the ice onto the seafloor.. Now, a team of researchers has embarked on a two-month expedition to excavate the deposited debris, hoping to discover secrets from the southernmost continent’s climatic past. 

That hitchhiking sediment, the researchers say, can help piece together how Antarctica’s vast ice sheet has waxed and waned over millennia. And knowing how much the ice melted in some of those warmest periods, such as the Pliocene Epoch about 3 million years ago, may provide clues to the ice sheet’s future. That includes how quickly the ice may melt in today’s warming world and by how much, says paleoclimatologist Michael Weber of the University of Bonn in Germany. 

- Link or reference: https://www.sciencenews.org/article/antarctica-iceberg-graveyard-climate-change


- Date: 09/04/19

- Scientific scope: climate change 

- Glossary: 
   
 -Hitch-hike: travel by getting free lifts in passing vehicles.
  
   -Pliocene Epoch is the epoch in the geologic timescale that extends from 5.333 million to 2.58 million years BP. It is the second and youngest epoch of the Neogene Period in the Cenozoic Era

- Commmentary

Since a long time humans have been receiving signals that the Earth every time was worse by climate change and for a long time we ignored those signals. We have to start taking care oof our planet in which we live if we dont want more animals in danger of extinction, wear masks because of contaminated air or, in this case, that the glacial layers continue melting rapidly. This research on the Antartic iceberg is necessary because we could discover a lot of information about the past and the future of the glacial layers.