By 2050, the canopy polar of the Arctic could be found without ice during the summer. This is what emerges from a new study conducted by the Institute of Atmospheric and Climate Sciences of the National Research Council (Cnr-Isac), in collaboration with the Institute of Polar Sciences (Isp), which has reconstructed the behavior of the ice cap arctic to varying global temperature, studying the evolution of ice between 36 thousand and 44 thousand years ago.
Each year the sea ice of the Arctic passes through a seasonal cycle, growing in surface and thickness during the colder winter months, before decreasing as temperatures rise in spring and summer, with lows usually occurring in September. Since satellite measurements began in the 1970s, the data has shown a record drop in minimum ice levels in the last 3 years.
Based on the findings of theEuropean space agency (Esa), the loss of ice depends precisely on the increase in temperatures, currently caused by global CO emissions2and also a reduction “substantial” of emissions will not prevent the disappearance of summer ice in 2050. The loss of this sea ice will have a profound impact on our environment, influencing ocean currents and accelerating Arctic warming. In fact, with a decrease in ice surfaces, open sea areas absorb more heat, causing an increase in the temperature of the oceans and initiating a cycle of warming and melting.
I study Sea ice fluctuations in the Baffin Bay and the Labrador Sea during glacial abrupt climate changes, of the CNR-ISAC and ISP, has strengthened the forecasts of the ESA and confirmed the danger, now almost certain, of a total disappearance of the summer ice of the Arctic Circle. The results of the study, in fact, showed that the reaction time of sea ice to sudden increases in temperature is almost instantor takes place over a maximum of 10 years, “Passing from a thick, long-lasting and persistent cover, in open sea conditions and seasonal ice“.
To achieve these results, the scientists combined data from two record changes in Arctic sea ice, observed across theanalysis of sea salts (as bromine and sodium) present in a so-called glacial carrot, extracted in northwestern Greenland, and on the association of bio-markers present in a marine sediment core taken from the Labrador Sea. The term “core” identifies cylindrical sections of soil, ice or rock, taken to carry out samples known by the term coring. Coring can be used to search for mineral resources, in archeology, to analyze the composition of the soil or, as in this case, to obtain useful information on the evolution of the Earth’s climatic conditions.