Currently, the world is experiencing an increase in natural disasters: large-scale fires, melting glaciers, increasing seismic and volcanic activity, in some places flooding, in others – water disappears.
What climate changes do you notice? write in the comments below the video!
Now the theory that the cause of climate change is an anthropogenic factor, that is, human activity, is widely discussed. There is no doubt that we have an impact on the environment, but how significant is our impact?
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Of great interest is the analysis of changes in the concentration of CO2 in the Earth’s atmosphere in the geological past and the comparison of these data with the level of volcanic activity.
An increase of almost twice the average annual number of volcanic eruptions should lead to a doubling of the gases entering the atmosphere during volcanic eruptions and, above all, CO2.
Analysis of data obtained at the Vostok station showed that over 420 thousand years, the content of carbon dioxide and methane changed synchronously and cyclically, and the same cyclicality was shown by the temperature. Approximately once every 100 thousand years, there was both an increase in temperature and an increase in the concentration of greenhouse gases. Then both the temperature and the content of greenhouse gases decreased and there was a much longer period of global cooling, accompanied by a significant increase in the mass of glaciers. The main cycle of the course of temperature and greenhouse gas content for the last 400 thousand years. years were determined by regular changes in the Earth’s orbit — the so-called Milankovich cycles, primarily a combination of precession and the angle of inclination of The earth’s axis to the Ecliptic.
The mirror of The world’s ocean, occupying 71 % of the surface of our planet, emits carbon into the atmosphere as it heats up, and then takes it back. This mechanism is the most significant in the distribution of carbon in the atmosphere, and it is worth noting that the amount of carbon that is emitted by industry is about a hundred times less than this annual change.
Long-term variability in CO2 content is mainly the result of changes in ocean surface temperature, which is a consequence of climate change.
Another significant source of CO2 emissions is the melting of permafrost, which in the future may lead to large-scale emissions of additional greenhouse gases into the atmosphere.
Sergey Razumov, doctor of geographical Sciences, Institute of permafrost studies, notes that the widespread long-term thawing of the upper eight meters of permafrost will lead to a doubling of the concentration of carbon dioxide in the atmosphere without taking into account the anthropogenic gas flow.
We see that the human impact on global climate change is minimal, compared to the processes that occur cyclically on our planet, what happens inside the Earth. And these processes are increasing every day, and we as humanity need to prepare and unite into one big family right now. After all, only together can we survive this period.