The Arctic challenges the law of nature

According to scientific calculations, the Arctic will become colder due to changes in earth orbit making it increasingly receive less sunlight. But the Earth's northernmost temperature has reached its highest level in 2,000 years.

Darrell S. Kaufman, a professor of geography and environmental science at Northern Arizona University (USA), said that the period 1999-2008 was the time when temperatures in the Arctic reached the highest level in 2,000 years. . Kaufman and his colleagues used a special software capable of reproducing the temperature across the globe over the decades. They then compared the results to complex computer-generated weather models at the US National Center for Atmospheric Research.

The habitat of white bears in the Arctic is increasingly narrowed due to melting.(Photo: priceofoil.org)

The team found that the average temperature in the Arctic in the summer was 1.4 degrees Celsius - higher than the scientists' prediction.

" Many people believe that the North Pole is very sensitive to climate change and our research proves it, " Jonathan T. Overpeck, a member of the research team, told AP.

Overpeck points out that, when the Arctic is warmer, the area has less snow and ice to reflect sunlight back into the universe. In addition, the melting phenomenon also revealed many areas of the ocean surface and surface. They absorb heat from the sun and make the Arctic warmer. Thus the melting speed of ice will increase.

The colder trend of the Arctic is the result of a 21,000-year cycle in the movement of the globe. That cycle makes the north pole getting less sunlight in the summer of 8,000 years. In the next few thousand years the amount of light that the Arctic receives from the sun continues to decrease.

" Without the emissions man-made, summer temperatures in the Arctic will decrease in the last century ," said Bette Otto-Bliesner, a scientist at the US National Center for Atmospheric Research. comment.