Siberian Federal University (SFA) specialists together with other Russian and foreign scientists reconstructed climate change in Eastern Siberia over the past nine thousand years. The results of the study are published in the Boreas scientific journal.
It is noted that the integrated approach applied by scientists has made it possible to significantly clarify the data of the former research. SFFA specialists analyzed marsh deposits near Krasnoyarsk, after which they compared the results obtained with data from different regions of the region.
Researchers said that for this they had to apply a new approach, which includes more than ten different techniques. It helped to identify a number of new paleoecological indicators, which indicated specific climatic conditions in the past.
“We first applied for the territory of the Basin Yenisei, the method of studying the non-gravity Palinomorph, to which the disputes of mushrooms, algae and residues of the daisons include. Also, we were able to determine the age of the peat and analyzed the layers of mineral particles present in it,” the senior teacher of the Ecology Department shared Natural Management Institute of Ecology and Geography SFU Alexander Mikhailova.
Research authors noted that the temperature maximum in Eastern Siberia had to take about 8150-7400 years ago. Then the warming was combined with the increase in humidity and an increase in the proportion of fir as part of the forests. The period of 7400-5100 years ago was a dry climate. Approximately 4500 years ago, moisturizing reached a maximum – specialists were found in the building of the swamp evidence of the spills of the nearest watercourse.
Numerous traces of short-term drought 1400-1300 years ago were accumulated in peat thickened and warm and warm medieval climatic optimum 1300-650 years ago. During the study, scientists managed at a qualitatively new level to appreciate the nature of the natural conditions of the region in Holocene, that is, the current geological era, said the associate professor of the department of ecology and environmental management of the Institute of Ecology and Geography of SFU Anna Grenaderov.
Earlier in California launched a satellite LandSat 9 to orbit to monitor the effects of global warming on the planet. This is the last project of the LandSat program, thanks to which anthropogenic and natural effects on the surface of the earth were recorded in space for decades.