Hydrogen accumulates in the Earth's atmosphere. Free Technical Library News

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Hydrogen accumulates in the Earth's atmosphere

26.08.2021

A group of climatologists led by Eric Saltzman, professor at the University of California at Irvine (USA), received information about how the concentration of hydrogen in the Earth's atmosphere has changed over the past century and a half. Scientists have obtained similar information by analyzing the chemical composition of air bubbles imprisoned in ice deposits in Antarctica.

Scientists were able to obtain such information thanks to the unique deposits of ice that have formed since 1852 in the territory of "megadunes", undulating deposits of compressed snow in East Antarctica. They are located in a region with extremely low rainfall, due to which a relatively thin layer of ice 60-70 meters thick contains layers that have been formed over many decades.

Climatologists collected ice samples from different regions of the "megadunes", removed air bubbles from such layers and studied their chemical composition in detail. As shown by their analysis, over the past 150 years, the concentration of hydrogen in the atmosphere has increased dramatically. It has increased by about 70%, and all this growth has occurred in the last hundred years.

Measurements by Professor Saltzman and his colleagues indicated that the concentration of hydrogen grew especially rapidly in the last two decades of the XNUMXth century. This discovery came as a surprise to scientists, as researchers in the past believed that the main source of these leaks was the production of so-called synthesis gas, a mixture of hydrogen and carbon monoxide.

Its production began to decline in the 1980s, leading many scientists to believe that atmospheric hydrogen concentrations should have similarly fallen. Ice samples from Antarctica indicate that this is not the case, suggesting that there are other significant sources of anthropogenic hydrogen releases. Their search and study should be one of the main tasks for climatologists, the researchers concluded.

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