According to a report from the National Aeronautics and Space Administration (NASA), the reduction is due to the fact that during the summer the ice at the north pole melted to below the 1981 average. -2010, 6.22 million square kilometers.
NASA Goddard Center researcher Walter Meier said the fact is striking as the summer started relatively cool, without the major storms or persistent winds that could break the ice or increase melting.
He said that it was even a relatively cold year, although the ice is much thinner than it used to be and therefore more susceptible to melting.
For the specialist, this behavior remains in line with the downward trend that the polar helmet has presented, whereby the Arctic Ocean has lost around 13 percent of its sea ice every decade.
He explained that to perform the analysis, the scientists include areas that are covered with at least 15 percent ice, which they determine with various methods.
In addition, they are supported by data from the Nimbus 7 satellite, which operated from 1978 to 1987, and from the United States Defense, which has provided information since 1987.
This monitoring of the behavior of the north polar helmet includes field campaigns in the air, to follow the changes in the Arctic sea ice and its impact on the climate, such as the IceBridge operation flights that in the Spring season measure the ice sheets of the Arctic sea and ice in recent years.
NASA highlighted the importance of keeping track of the behavior of the polar helmet, since it will also reveal the various climatic changes that the planet will experience for the coming decades.