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Ozone-Depleting Substance Causes Half of Arctic Warming

Ozone-depleting substances behind half of Arctic warming

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Arctic warming
Ozone-depleting substances caused half of Arctic warming and sea ice loss. Pixabay

Ozone-depleting substances caused half of Arctic warming and sea ice loss from 1955 to 2005, causing about a third of all global warming during that period, reveals a significant study.

A scientific paper published in 1985 was the first to report a burgeoning hole in Earth’s stratospheric ozone over Antarctica.

The discovery left scientists into a huddle to determine the cause which happened to be ozone-depleting substances – long-lived artificial halogen compounds entirely manmade and popularly used as refrigerants, solvents and propellants.

The new study from researchers at Columbia University and published in the journal Nature Climate Change examined the greenhouse warming effects of ozone-depleting substances (ODS).

Arctic warming
Ozone-depleting substances act as a strong supplement to carbon dioxide and had lead to Arctic warming. Pixabay

It found that the ozone-depleting substances acted as a strong supplement to carbon dioxide, the most pervasive greenhouse gas. “We showed that ODS have affected the Arctic climate in a substantial way,” said researcher Michael Previdi from Lamont-Doherty Earth Observatory.

The scientists reached their conclusion using two very different climate models that are widely employed by the scientific community, both developed at the US National Center for Atmospheric Research. The results highlight the importance of the Montreal Protocol, which has been signed by nearly 200 countries.

“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. “In the coming decades, they will contribute less and less to global warming. It’s a good-news story”.

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.

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The Montreal Protocol 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, revealed the new study. (IANS)

  • Gordon Jenkins

    All of a sudden CO2 is irrelevant to the global warming narrative and Bang! HFCs dramatically introduced into the narrative, have caused Arctic Warming all along, but that’s OK because HFCs are decreasing, so the planet will now start cooling? Me thinks the alarmists are conceding to natural climate cycles but are doing their face-saving retreat in their own linear fashion that still blames and shames you. This convoluted story is absolutely absurd. Grand Solar Minimum, much? The CMIP6 Data now includes (allows) some solar and galactic climate forcing mechanisms to be introduced into the modelling. The writing is in the Computer Code to end the man-made climate charade from the Holy of Holy places, the IPCC, itself. The End is Nigh for the IPCC.

    • der_rittmeister

      Did you actually read it? How are those flat earth society meetings these days?

  • PreachJohn

    .04 of 1% CO2 is the ‘most pervasive greenhouse gas’? If you had said
    ‘methane’, and I’d still be looking for quantities, I might still be
    listening. How does this tiny percentage of CO2 warrant ‘pervasive’?
    No amount of rationalization can establish CO2 as a main driver of
    the limited climate change that is occurring while in these
    quantities.
    Man made climate change is a major deception. The best
    and most compelling scientific facts do not support this arrogant
    man-o-centric assumption.
    This forum is not the platform to establish
    the case and facts of where the earth is in its orbit, and solar
    storms/flares as the more cause/effect drivers of the limited climate
    change that is occurring. This is a worthy avenue of research to
    check out.
    Neither is this the forum to make a distinction
    between three subjects that are conflated in the public perception as
    one and the same. Climate change, global warming, man made of either
    one or both of these.
    CO2 is plant food sustaining all green plants
    forever and a day. CO2 that is in a convection model, not a layered
    one. CO2 is not carbon. The two have been wrongly conflated in the
    public mind. Two separate subjects.
    There is less CO2 measurable at the beginning of earth’s regular climate cycles than at the end. Over and over again. Historically it is not then the driver of climate cycles.
    Anyway good read on ODSs and their possible contribution
    to what is happening at the poles. Definitely thought provocative.

  • Gallilao

    This is complete and total lies and fraud. Nothing in the atmosphere has any affect on the Arctic and these authors are swindlers and crooks!

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  • Gordon Jenkins

    All of a sudden CO2 is irrelevant to the global warming narrative and Bang! HFCs dramatically introduced into the narrative, have caused Arctic Warming all along, but that’s OK because HFCs are decreasing, so the planet will now start cooling? Me thinks the alarmists are conceding to natural climate cycles but are doing their face-saving retreat in their own linear fashion that still blames and shames you. This convoluted story is absolutely absurd. Grand Solar Minimum, much? The CMIP6 Data now includes (allows) some solar and galactic climate forcing mechanisms to be introduced into the modelling. The writing is in the Computer Code to end the man-made climate charade from the Holy of Holy places, the IPCC, itself. The End is Nigh for the IPCC.

    • der_rittmeister

      Did you actually read it? How are those flat earth society meetings these days?

  • PreachJohn

    .04 of 1% CO2 is the ‘most pervasive greenhouse gas’? If you had said
    ‘methane’, and I’d still be looking for quantities, I might still be
    listening. How does this tiny percentage of CO2 warrant ‘pervasive’?
    No amount of rationalization can establish CO2 as a main driver of
    the limited climate change that is occurring while in these
    quantities.
    Man made climate change is a major deception. The best
    and most compelling scientific facts do not support this arrogant
    man-o-centric assumption.
    This forum is not the platform to establish
    the case and facts of where the earth is in its orbit, and solar
    storms/flares as the more cause/effect drivers of the limited climate
    change that is occurring. This is a worthy avenue of research to
    check out.
    Neither is this the forum to make a distinction
    between three subjects that are conflated in the public perception as
    one and the same. Climate change, global warming, man made of either
    one or both of these.
    CO2 is plant food sustaining all green plants
    forever and a day. CO2 that is in a convection model, not a layered
    one. CO2 is not carbon. The two have been wrongly conflated in the
    public mind. Two separate subjects.
    There is less CO2 measurable at the beginning of earth’s regular climate cycles than at the end. Over and over again. Historically it is not then the driver of climate cycles.
    Anyway good read on ODSs and their possible contribution
    to what is happening at the poles. Definitely thought provocative.

  • Gallilao

    This is complete and total lies and fraud. Nothing in the atmosphere has any affect on the Arctic and these authors are swindlers and crooks!

Next Story

New Species of Soil Bacteria Can Fight Soil Pollutants

This bacteria to fight climate change, soil pollutants

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Soil bacteria
Researchers have found a new species of soil bacteria that is particularly adept at breaking down organic matter. (Representational Image). Pixabay

Researchers have found a new species of soil bacteria that is particularly adept at breaking down organic matter, including the cancer-causing chemicals that are released when coal, gas, oil and refuse are burned.

The newly discovered bacteria belong to the genus Paraburkholderia madseniana, which are known for their ability to degrade aromatic compounds and, in some species, the capacity to form root nodules that fix atmospheric nitrogen.

According to the study, researchers at Cornell University in the US with colleagues from Lycoming College described the new bacterium in a paper published in the International Journal of Systematic and Evolutionary Microbiology.

Soil bacteria
The bacteria has the capacity to form root nodules that fix atmospheric nitrogen in the soil. (Representational Image). Pixabay

The first step was sequencing the bacterium’s ribosomal RNA genes, which provided genetic evidence that madseniana was a unique species.

In studying the new bacteria, the researchers noticed that madseniana is especially adept at breaking down aromatic hydrocarbons, which make up lignin, a major component of plant biomass and soil organic matter.

According to the researchers, aromatic hydrocarbons are also found in toxic PAH pollution.

This means that the newly identified bacteria could be a candidate for biodegradation research and an important player in the soil carbon cycle.

In the case of madseniana, Buckley’s lab wants to learn more about the symbiotic relationship between the bacteria and forest trees.

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Initial research suggests that trees feed carbon to the bacteria, and in turn the bacteria degrade soil organic matter, thereby releasing nutrients such as nitrogen and phosphorus for the trees.

Understanding how bacteria break down carbon in soil could hold the key to the sustainability of the land and the ability to predict the future of global climate, the researchers said. (IANS)