Ozone-depleting substances caused half of Arctic warming

James Marshall
January 22, 2020

That means that these substances are responsible for a third of global warming during this time period. The Arctic is warming at more than twice the average rate of the rest of the globe a phenomenon known as Arctic amplification and it is losing sea ice at a staggering pace.

In reality, the protocol was implemented within a few years of scientists discovering that CFCs were linked to an alarming degradation of the ozone layer - a region of the atmosphere that blocks cancer-causing ultraviolet radiation from the sun.

Bigger than three decades later, researchers receive made a recent discovery. By running the models with fixed CFC concentrations while varying the thickness of the ozone layer, the team was able to attribute the warming directly to the chemicals rather than changes these substances caused in the ozone layer.

In addition to causing a hole in the ozone layer above Antarctica, ozone-depleting substances are responsible for half of all Arctic warming between 1955 and 2005, according to a paper published yesterday (January 20) in Nature Climate Change. The Arctic has viewed all of a sudden melting sea ice for years and is warming faster than the comfort of the realm.

The team's analysis suggests the effect is so pronounced that climate change would, by now, be a far more urgent and dire matter in the North had it not been for the Montreal Protocol - the 1987 treaty which bans the release of those substances due to their harmful effect on the ozone layer.

Between 1955 and 2005, ozone-depleting gases precipitated half of Arctic local climate trade.
CFCs, which include blowing agents and refrigerants, have been around since the 1920s and 1930s. Due to the swift global reaction, atmospheric concentrations of most ODS peaked in the late 20th century and have been declining since. To ensure the result was not simply a quirk of the simulation, they ran the experiment using two different computer models and arrived at a similar outcome.

It found that the ozone-depleting substances acted as a strong supplement to carbon dioxide, the most pervasive greenhouse gas.

The glimpse's findings now no longer handiest give an further gold principal individual to the a lot-acclaimed Montreal Protocol, nonetheless additionally present a piece of hope when loads local climate trade learn specializes in doom and gloom.

The results suggest that continued phase-out of ODS will help mitigate Arctic warming and sea ice melt in the future.

Both Strahan and Cecilia Bitz, a climate scientist at the University of Washington in Seattle said that replicating these results in multiple climate models will be crucial for improving estimates of just how much responsibility CFCs bear for heating the Arctic.

Don't obtain too wrathful honest proper yet, even though.

Then there would possibly be additionally the topic of CFCs tranquil being veteran no topic worldwide crackdowns. To boot to, we have got honest proper begun to address hydrofluorocarbons (HFCs), which air conditioner and fridge producers turned to after they were blocked from CFCs, on a global scale. In one case, they tested what would happen if the stratospheric ozone and the troublesome gases that harmed it remained at the 1955 level.

And to make certain, weakening the ozone is tranquil a truly inaccurate trait to receive.

Sorry to be a downer.

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