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Unprecedented rise in carbon dioxide in the atmosphere

Anthropogenic CO2 increase is unprecedented, Science Daily 
Date:
August 20, 2020
Source:
University of Bern
Summary:
Even in earlier warm periods there were pulse-like releases of CO2 to the atmosphere. Today’s anthropogenic CO2 rise, however, is more than six times larger and almost ten times faster than previous jumps in the CO2 concentration.

A new measurement technology developed at the University of Bern provides unique insights into the climate of the past. Previous CO2 concentrations in the atmosphere could be reconstructed more accurately than ever before, thanks to high-resolution measurements made on an Antarctic ice core. The study, which analyzed the Earth’s atmospheric composition between 330,000 and 450,000 years ago, was made possible by the commitment of experts, and their decades of experience, at the University of Bern. The results of the study have been published in Science.

Melting ice masses disturbed the ocean circulation…………

CO2 increase was ten times slower than today ……..

The largest jump in the past corresponds to the current CO2 emissions over only six years

The researchers compared the CO2 jumps of the past with the ongoing human-driven rise of CO2 concentration in the atmosphere. According to Stocker, the largest centennial CO2 jump in the past was around 15 ppm (parts per million is the unit for atmospheric CO2 concentration), which is approximately equivalent to the increase caused by humankind over the last of six years. “This may not seem significant at first glance,” says Stocker, “but in light of the quantities of CO2 that we are still allowed to emit in order to achieve the 1.5°C climate target agreed in Paris, such increases are definitely relevant.” The findings of this study put us under even greater pressure to protect the climate.

Story Source:

Materials provided by University of Bern. https://www.sciencedaily.com/releases/2020/08/200820151335.htm

August 22, 2020 - Posted by | 2 WORLD, climate change

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