Global warming hits Albanian migratory birds hardest
DIVJAKA, Albania – Thousands of migratory birds have failed to make their…
According to a recent study, the Arctic is melting four times faster than the planet is warming.
The research could not identify other explanations but hypothesized that the causes; may be related to “sea ice and water vapor feedbacks” in addition to changes in the way the atmosphere heats; and the ocean is moving into the Arctic.
Unfortunately, all but four of the 39 climate models completely ignored this fact; that the rate of Arctic temperature decline has accelerated over the past 50 years.
According to Petr Chylek, physicist and climate researcher at Los Alamos National Laboratory and lead author of the study; “thirty years is considered the minimum to describe climate change”. We have seen two clear jumps to this shorter time scale – the first in 1986 and the second in 1999; unlike other studies which indicated that the Arctic Amplification Index increases gradually.
Sea levels are rising due to melting of the Greenland Ice Sheet in the Arctic; which has a direct influence on coastal cities and can create natural disasters around the world.
The air temperature difference over the Arctic relative to its lower latitudes has been measured by the IAA; which was calculated for the study. The 21-year average Arctic temperature ratio; to the 21-year global average temperature is the AAI in this study.
The AAI was four in the first decades of the 21st century; which is four times faster than the global standard and much faster; than earlier studies had predicted using time intervals of 30 to 40 years.
The researchers found that four of the 39 climate change models used in the coupled model intercomparison; Project’s CMIP6 collection has recreated the first stage around 1986 quite well; but none replicated the second stage in 1999.
Since several models accurately predict the first stage, Chylek said, “We assigned the first stage to increasing amounts; carbon dioxide and other contaminants in the atmosphere. But since no model can duplicate the second phase; we believe it is caused by climate variability.