Soil scientists have taught archaeologists to determine the amount of precipitation in the past
Scientists have investigated several barrows dated to the period from 4200 to 1300 BC and determined the biomass of microorganisms in layers of various epochs. They compared the mass of microbes and fungi with the humidity of the climate, which was determined by the content of salt in the same layers, which revealed how the number of microorganisms varies according to the humidity of the climate — the more humid the climate was during a certain period, the greater the number of microbes in the corresponding soil layer.
Now that characteristic of the soil from barrows or other archaeological objects can be used to estimate the norm of precipitation in a particular locality during different periods of human history.
The scientific article is published in the journal Arid ecosystems (Аридные экосистемы).