Photo: Mark Blinch / Reuters
Scientists from the University of Toronto in Canada have found that climate warming in the region of Yukon in Northwest Canada was the strongest in more than ten thousand years. About it reported in a press release on EurekAlert!.
The researchers conducted radiocarbon Dating and analysis of the isotopic composition of water samples of the permafrost (permafrost) peatlands in the Central Yukon. This allowed them to reconstruct the average temperature over the past 600 years 13.
Layers of the permafrost are a kind of record of summer precipitation which percolates through the peat moss and soil and freeze at a depth of 58 cm below the surface of the earth. As a result, every centimeter of the permafrost zone contains precipitation accumulated over 20-30 years. The composition of the isotopes in the samples of permafrost depends on precipitation and air temperature.
It turned out that in the early Holocene (the epoch of the Quaternary period, lasting for the last 12 thousand years) summer temperatures were higher than during the middle Holocene. However, the warming in the industrial era was unprecedented in the whole considered period of time. Current average temperatures exceed past performance by nearly two degrees Celsius. According to scientists, the evidence of climate change in the region occurs with exceptional speed.
Researchers believe that the warming could destabilize permafrost, leading to even greater emissions of carbon dioxide.
Video, photo All from Russia.