Photo: Kevin Krajick / Earth Institute
Scientists at Columbia University in the US found that ozone-depleting substances (ODS) responsible for approximately half of catastrophic effects of human activity on the climate. About the true causes of global warming, according to a press release on EurekAlert!.
Researchers have determined that ODS developed in the 20-ies and 30-ies of XX century and were widely used as refrigerants, solvents and aerosols, caused a third of the total global warming from 1995 to 2005 and half the warming in the Arctic and loss of sea ice during the same period. They played the role of additions to carbon dioxide, however, since the cessation of production, this effect started to decline.
To evaluate the contribution of ozone-depleting substances to climate change, the researchers used two different climate models developed at the National center for atmospheric research USA.
The Montreal Protocol, which entered into force in 1989, ordered to stop the production of ODS worldwide. Due to the rapid international reaction, the concentrations of most ODSs in the atmosphere peaked in the late twentieth century and has been declining ever since. However for 50 years the impact of substances on the Earth’s atmosphere remained significant.
Video, photo All from Russia.