Miami, the coastal city in the United States is one that would be affected by higher sea level, predicted by scientists. (Photo by Marc Averette, Wikimedia Commons)
With an increase of only 2.1 degrees Celsius in average global temperatures, sea levels rose on our planet at least six meters , – 20 feet above current levels, and this happened on multiple occasions over the past three million years, according to a new study published by Oregon State University on July 9.
It is recalled that the governments of different countries say they want to agree on an increase of 2 degrees above the average temperature of the records listed in the twentieth century. Scientists warn that current levels of CO2 steadily increasing temperatures will rise again, and the effects are predicted disastrous (*).
The results meant three decades of research on the historical effects of melting polar ice caps . “Studies have shown that both Greenland and the ice sheets of Antarctica have contributed significantly to this increase in sea level above modern levels,” said Anders Carlson , glacial geologist and paleoclimatologist , University.
“Levels of carbon dioxide -CO2-atmospheric modern are now equivalent to those that existed three million years ago when the sea level was at least six meters higher , because the ice sheets are greatly reduced.
According to Carlson, who also belongs to College of Earth, Ocean and Atmospheric Sciences, “is not long for this to occur again,” There is evidence that we are probably seeing the transformation begins to take place now. “
To paleoclimatologist Peter Clark , because the carbon dioxide has -CO2- current levels as high as it was 3 billion years ago,” has already occurred certain amount of increase sea level. “
” The ominous aspect to this is that CO2 levels continue to rise , so that we are entering uncharted territory “Clark said.
” What is not so certain is the time frame (…) We could be talking about many centuries to a few thousand years to see all impact of melting ice sheets, “said the scientist.
Six meters of sea level rise can be catastrophic for coastal cities around the world, the hundreds of millions of people living there, warns the report
- Miami has an average height of only 1.8 meters . – 6 feet, within the state of Florida, which has a height of 15 meters or less.
- In the past, parts of New Orleans other areas of Louisiana were surpassed by Hurricane Katrina. Are part of the cities that collapse with rising sea level.
- Dhaka , Bangladesh is one of the 10 most populated cities in the world , with 14.4 million inhabitants, and all those living in low-lying areas, warns the Oregon study.
- Tokyo and Singapore also They have been identified as extremely vulnerable to rising sea level.
“The influence of the rise of the oceans is even higher than the overall amount of increase sea level, because wings of the storm tides, erosion and flooding, “Carlson said. “ The impact could be enormous.”
The review published is part of a longer document, the Past Global Changes, an international scientific team in a working group known as PALSEA2
The study was reviewed by Andrea Dutton of the University of Florida, is also analyzed Greenland and Antarctica in independently.
“The past climates that forced these changes in the volume of ice and sea level were reconstructed mainly from sensitive to temperature measurements in ocean cores worldwide, and from ice cores, Carlson said to provide security for the 30 years of analysis.
(*) 30 Nobel prizes: “If the risk is not acting is inconceivable and unacceptable”
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