“Even if we meet that 2°C target, in the past with those types of temperatures, we may be committing ourselves to this level of sea level rise in the long term”, Andrea Dutton, a geochemist at the University of Florida and one of the study’s co-authors, said. This would be the most concerned thing as the world is trying to achieve to limit global warming to 2 degrees Celsius under the current climate negotiations. It is not going to take place soon.
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Thursday’s study, based on studies of everything from ancient ice to fossil corals, said sea levels rose by between six and nine metres in a warm period about 125,000 years ago when temperatures were similar to those of today.
The researchers saw that global sea levels has increased to around 20 feet above the levels right now on multiple occasions over the past 3 million years. At that time, temperatures were 1.8 degrees higher than those recorded before the Industrial Revolution, which is the same level we now experience.
A major new analysis on the impact melting polar ice sheets could have on sea level rise has given rise to some worrisome conclusions.
Earlier rise could be linked to natural changes in earth’s orbit around the Sunday.
“As the planet warms, the poles warm even faster, raising important questions about how ice sheets in Greenland and Antarctica will respond”.
The quantity of melting was brought on by a rise of just one-two levels (Celsius) in global imply temperatures, and it’s the most regarding factor.
Ocean sediment records and ice sheet computer simulations were used to estimate Greenland and Antarctic ice sheet volumes. Peter Clark, co-author of the study and paleoclimatology expert at the Oregon State University, argued that because current Carbon dioxide levels match those 3 million years ago we are already on the path of a “certain amount of sea level rise”.
Dhaka in Bangladesh, with a population of 14.4 million all living in low-lying areas, Tokyo and Singapore are also said to be extremely vulnerable to sea level rises. An average high tide would more than double the height of Sandy’s peak surge at The Battery in New York City, while Hampton Roads, Va., and Charleston, S.C., would disappear nearly entirely, along with too many towns and cities in Florida to count.
Mr. Carlson added that Carbon dioxide levels we experience today are very much the same as those 3 million years ago, when the sea level was about 19 feet higher.
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Marine Isotope Stage 5e: Average temperatures were 1 degree Celsius warmer than pre-industrial levels (pretty close to today). The past climates that forced these changes in ice volume and sea level were reconstructed mainly from temperature-sensitive measurements in ocean cores from around the globe, and from ice cores.
