The Arctic ice cap is shrinking abnormally fast.
Global warming and air pollution due to human activities can lead to the fact that one day in the North Pole will melt all the ice, scientists warn. This summer there were very significant reduction of the ice cover over the past 1450 years. The consequences of the anomalies are not long in coming: the atmosphere will be even more heated, and the northern fauna threatened with extinction.
Experts led by geologist Christophe Kinnard examined records of meteorological observations over the years, ship logs and geological samples. After analyzing the information, they concluded that the sharp decrease of the ice caps in the Arctic, which is observed even by satellite, is not only a record, but also abnormal. "This year was only the surface area of 4.33 million square kilometers. And we have every reason to believe that this trend will continue in the future" — warned Kinnard.
Ermond Hansen of the Norwegian Polar Institute, who conducted their research independently of Kinnard and colleagues confirmed the trend not only reduce, but the thinning of glaciers in the Arctic. According to his calculations, the multi-year ice, which formed several winters and reach 5 m in thickness, have almost disappeared. So, in 1990 they accounted for 28% of the surface of the North Pole, and last year amounted to only 6%. In this case, the thickness was reduced to 2.2 m, the multi-year ice is gradually transformed by their characteristics in the annuals.
The cause of these phenomena, perhaps, for no one is no longer a mystery. Enormous amount of greenhouse gases in the atmosphere increases the greenhouse effect, warming the air. If you believe the recent report the UN weather service, their content is at its peak last year. The level of radiation, that is, the radiation of heat, for the last 20 years has increased by 29%.
Melting ice in the Arctic, in turn, will lead to irreparable consequences. They reflect up to 80% of sunlight, and with their disappearance the surface ocean will absorb 90% of the radiation from the sun due to its heat. So, this heat will be transferred to the atmosphere.
It is a vicious circle. An increase in temperature causes the ice to melt, and their destruction, in turn, only accelerates the process of global warming. In addition, Kinnard warned, do not forget about the level of the oceans, which will be supplied with water. Researchers fear that by 2100 it could rise by as much as 1.6 meters.
Do not forget that the processes occurring in the Arctic affect the animals and birds, said Alexander Kokorin, coordinator of the "Climate and energy" of the World Wildlife Fund (WWF). Already polar bears suffer from natural disasters. If the ice edge in summer goes too far from the coast, bears do not have time to go along with it, following the seals remain on the beach. Here they face starvation and cannibalism (they start to eat their young.) In built-up areas of the Arctic, they can start hunting for the person.