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Thread: Substantial twentieth-century Arctic warming caused by ozone-depleting substances

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    Default Substantial twentieth-century Arctic warming caused by ozone-depleting substances

    Fascinating paper just published in Nature Climate Change
    .
    Abstract

    The rapid warming of the Arctic, perhaps the most striking evidence of climate change, is believed to have arisen from increases in atmospheric concentrations of GHGs since the Industrial Revolution. While the dominant role of carbon dioxide is undisputed, another important set of anthropogenic GHGs was also being emitted over the second half of the twentieth century: ozone-depleting substances (ODS). These compounds, in addition to causing the ozone hole over Antarctica, have long been recognized as powerful GHGs. However, their contribution to Arctic warming has not been quantified. We do so here by analysing ensembles of climate model integrations specifically designed for this purpose, spanning the period 1955–2005 when atmospheric concentrations of ODS increased rapidly. We show that, when ODS are kept fixed, forced Arctic surface warming and forced sea-ice loss are only half as large as when ODS are allowed to increase. We also demonstrate that the large impact of ODS on the Arctic occurs primarily via direct radiative warming, not via ozone depletion. Our findings reveal a substantial contribution of ODS to recent Arctic warming, and highlight the importance of the Montreal Protocol as a major climate change-mitigation treaty.

    https://www.nature.com/articles/s41558-019-0677-4

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    McSquawker said that he'd only accept papers from Nature or Science, but you can bet your arse that he'll ignore this.

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    Quote Originally Posted by Havana Moon View Post
    McSquawker said that he'd only accept papers from Nature or Science, but you can bet your arse that he'll ignore this.
    Yep as predicted, the scumbag won't come near this!

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    .
    Nor will Crypiss comes to that, he's all piss and wind as well. No wonder the climate Jonahs refuse to come near this, they hate any good news.

    Half of Late 20th-Century Arctic Warming Caused by Ozone-Depleting Substances – “It’s a Good-News Story”

    A new study shows that half of all Arctic warming and corresponding sea-loss during the late 20th century was caused by ozone-depleting substances.

    A scientific paper published in 1985 was the first to report a burgeoning hole in Earth’s stratospheric ozone over Antarctica. Scientists determined the cause to be ozone-depleting substances – long-lived artificial halogen compounds. Although the ozone-destroying effects of these substances are now widely understood, there has been little research into their broader climate impacts.

    A study published today (January 20, 2020) in Nature Climate Change by researchers at Columbia University examines the greenhouse warming effects of ozone-depleting substances and finds that they caused about a third of all global warming from 1955 to 2005, and half of Arctic warming and sea ice loss during that period. They thus acted as a strong supplement to carbon dioxide, the most pervasive greenhouse gas; their effects have since started to fade, as they are no longer produced and slowly dissolve.

    Ozone-depleting substances, or ODS, were developed in the 1920s and ’30s and became popularly used as refrigerants, solvents, and propellants. They are entirely manmade, and so did not exist in the atmosphere before this time. In the 1980s a hole in Earth’s stratospheric ozone layer, which filters much of the harmful ultraviolet radiation from the sun, was discovered over Antarctica. Scientists quickly attributed it to ODS.

    The world sprang into action, finalizing a global agreement to phase out ODS. The Montreal Protocol, as it is called, was signed in 1987 and entered into force in 1989. Due to the swift international reaction, atmospheric concentrations of most ODS peaked in the late 20th century and have been declining since. However, for at least 50 years, the climate impacts of ODS were extensive, as the new study reveals.

    Scientists at Columbia’s School of Engineering and Applied Science and the Lamont-Doherty Earth Observatory used climate models to understand the effects of ODS on Arctic climate. “We showed that ODS have affected the Arctic climate in a substantial way,” said Lamont-Doherty researcher Michael Previdi. The scientists reached their conclusion using two very different climate models that are widely employed by the scientific community, both developed at the U.S. National Center for Atmospheric Research.

    The results highlight the importance of the Montreal Protocol, which has been signed by nearly 200 countries, say the authors. “Climate mitigation is in action as we speak because these substances are decreasing in the atmosphere, thanks to the Montreal Protocol,” said Lorenzo Polvani, lead author of the study and a professor in Columbia’s Department of Applied Physics and Applied Mathematics. “In the coming decades, they will contribute less and less to global warming. It’s a good-news story.”

    Reference: “Substantial twentieth-century Arctic warming caused by ozone-depleting substances” by L. M. Polvani, M. Previdi, M. R. England, G. Chiodo and K. L. Smith, 20 January 2020, Nature Climate Change.

    https://scitechdaily.com/half-of-lat...od-news-story/

    https://m.phys.org/news/2020-01-ozon...ry-arctic.html
    Last edited by cancel2 2022; 02-02-2020 at 08:19 PM.

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    Quote Originally Posted by Havana Moon View Post
    McSquawker said that he'd only accept papers from Nature or Science, but you can bet your arse that he'll ignore this.
    Where are the Calicunts?

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    Quote Originally Posted by Havana Moon View Post
    Yep as predicted, the scumbag won't come near this!
    I see no Calicunts!!

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    This is such a sad thread, I had to stop by because Gladys has been talking only to himself. Poor Gladys

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    Quote Originally Posted by Phantasmal View Post
    This is such a sad thread, I had to stop by because Gladys has been talking only to himself. Poor Gladys
    Oh ok, sorry that you think Hot Whopper or DeSmogBlog are more prestigious than Nature, silly me! Would you prefer Scientific American instead?

    https://www.scientificamerican.com/a...rctic-warming/

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    Interesting article, thanks for sharing. The leftists loons don't really care about global warming if it can't be used to control the population and advance their anti liberty, globalist agenda.

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    co2 ain't the problem. this is problematic for elitist globalist control freaks because they want to tax people to breathe.

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    The current warming trend is of particular significance because most of it is extremely likely (greater than 95 percent probability) to be the result of human activity since the mid-20th century and proceeding at a rate that is unprecedented over decades to millennia.1
    Earth-orbiting satellites and other technological advances have enabled scientists to see the big picture, collecting many different types of information about our planet and its climate on a global scale. This body of data, collected over many years, reveals the signals of a changing climate.
    The heat-trapping nature of carbon dioxide and other gases was demonstrated in the mid-19th century.2 Their ability to affect the transfer of infrared energy through the atmosphere is the scientific basis of many instruments flown by NASA. There is no question that increased levels of greenhouse gases must cause the Earth to warm in response.
    Ice cores drawn from Greenland, Antarctica, and tropical mountain glaciers show that the Earth’s climate responds to changes in greenhouse gas levels. Ancient evidence can also be found in tree rings, ocean sediments, coral reefs, and layers of sedimentary rocks. This ancient, or paleoclimate, evidence reveals that current warming is occurring roughly ten times faster than the average rate of ice-age-recovery warming.3
    The evidence for rapid climate change is compelling


    NASA

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    Quote Originally Posted by Micawber View Post
    The current warming trend is of particular significance because most of it is extremely likely (greater than 95 percent probability) to be the result of human activity since the mid-20th century and proceeding at a rate that is unprecedented over decades to millennia.1
    Earth-orbiting satellites and other technological advances have enabled scientists to see the big picture, collecting many different types of information about our planet and its climate on a global scale. This body of data, collected over many years, reveals the signals of a changing climate.
    The heat-trapping nature of carbon dioxide and other gases was demonstrated in the mid-19th century.2 Their ability to affect the transfer of infrared energy through the atmosphere is the scientific basis of many instruments flown by NASA. There is no question that increased levels of greenhouse gases must cause the Earth to warm in response.
    Ice cores drawn from Greenland, Antarctica, and tropical mountain glaciers show that the Earth’s climate responds to changes in greenhouse gas levels. Ancient evidence can also be found in tree rings, ocean sediments, coral reefs, and layers of sedimentary rocks. This ancient, or paleoclimate, evidence reveals that current warming is occurring roughly ten times faster than the average rate of ice-age-recovery warming.3
    The evidence for rapid climate change is compelling


    NASA
    Hey arsehole I posted a Nature article, I even followed that up with an article in Scientific American ffs. You used to bang on about not listening to anything that wasn't from either Nature or Science, so what's your excuse now fuckwit?

    I'll lay even odds that the NASA article was written by arch-alarmist Gavin Schmidt, the head of the Goddard Institute for Space Studies. Which is pretty laughable as it has nothing to do with rocket pioneer Robert Goddard and previous little to do with Space either.
    Last edited by cancel2 2022; 02-06-2020 at 12:12 AM.

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    Quote Originally Posted by Havana Moon View Post
    Hey arsehole I posted a Nature article, I even followed that up with an article in Scientific American ffs. You used to bang on about not listening to anything that wasn't from either Nature or Science, so what's your excuse now fuckwit?

    I'll lay even odds that the NASA article was written by arch-alarmist Gavin Schmidt, the head of the Goddard Institute for Space Studies. Which is pretty laughable as it has nothing to do with rocket pioneer Robert Goddard and previous little to do with Space either.
    You can run away now, after all you're pretty good at that!

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    Quote Originally Posted by Sirthinksalot View Post
    Interesting article, thanks for sharing. The leftists loons don't really care about global warming if it can't be used to control the population and advance their anti liberty, globalist agenda.
    I can pretty much guarantee that you'll never see the BBC, Guardian, NYT or WaPo write about it.

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    Quote Originally Posted by Havana Moon View Post
    Oh ok, sorry that you think Hot Whopper or DeSmogBlog are more prestigious than Nature, silly me! Would you prefer Scientific American instead?

    https://www.scientificamerican.com/a...rctic-warming/
    I was told a long time ago by somebody, who will remain nameless, that you're a very spiteful and vengeful woman when crossed. Sad really, that's what comes of hanging around uber-bitches like Snarla and Crypiss.

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