Ozone hole is healing: bad news for us carbon sinners say models.

Posted: May 28, 2018 by tallbloke in alarmism, climate, Clouds, ozone, solar system dynamics

leak.smlThe hole in the ozone layer is now steadily closing, but its repair could actually increase warming in the southern hemisphere, according to scientists at the University of Leeds.

The Antarctic ozone hole was once regarded as one of the biggest environmental threats, but the discovery of a previously undiscovered feedback shows that it has instead helped to shield this region from carbon-induced warming over the past two decades.

High-speed winds in the area beneath the hole have led to the formation of brighter summertime clouds, which reflect more of the sun’s powerful rays.

“These clouds have acted like a mirror to the sun’s rays, reflecting the sun’s heat away from the surface to the extent that warming from rising carbon emissions has effectively been cancelled out in this region during the summertime,” said Professor Ken Carslaw of the University of Leeds who co-authored the research.

“If, as seems likely, these winds die down, rising CO2 emissions could then cause the warming of the southern hemisphere to accelerate, which would have an impact on future climate predictions,” he added.

The key to this newly-discovered feedback is aerosol — tiny reflective particles suspended within the air that are known by experts to have a huge impact on climate.

Greenhouses gases absorb infrared radiation from the Earth and release it back into the atmosphere as heat, causing the planet to warm up over time. Aerosol works against this by reflecting heat from the sun back into space, cooling the planet as it does so.

Beneath the Antarctic ozone hole, high-speed winds whip up large amounts of sea spray, which contains millions of tiny salt particles. This spray then forms droplets and eventually clouds, and the increased spray over the last two decades has made these clouds brighter and more reflective.

As the ozone layer recovers it is believed that this feedback mechanism could decline in effectiveness, or even be reversed, leading to accelerated warming in the southern hemisphere.

Full story

Comments
  1. tallbloke says:

    Nota bene: Not a single word about CFC’s in this article.

  2. oldbrew says:

    brighter summertime clouds, which reflect more of the sun’s powerful rays

    1) no sun in the Antarctic for 6 months of the year
    2) low angle of sun in the Antarctic for the other 6 months means weak rays not powerful ones, and significant reflection off the surface

    http://en.wikipedia.org/wiki/Effect_of_Sun_angle_on_climate

    Ice reflects the sun anyway.

  3. tallbloke says:

  4. tallbloke says:

  5. erl happ says:

    Quote: ‘warming from rising carbon emissions has effectively been cancelled out in this region during the summertime’.

    Well professor, if you examine the data across the globe and according to month you will find that the warming is in winter, not summer. Yes, that applies to the entire globe.So the lack of warming in the southern hemisphere in summer is not atypical. In fact, the entire southern hemisphere has not warmed in January over the period of record.

    So, in the summer hemisphere the warming has been greatest in July and August and in the northern hemisphere its in January and February.

    First step in diagnosis is to make a thorough survey of the patient.

  6. Scientists at the Leeds University are warmist freaks. The ozone layer was not affect in the least by CFCs because ozone variations are of a natural origin.

    1) Mario Molina’s dimer theory postulates that UV radiation is a must for the ozone destruction but… ozone destruction inside the hole (the only place on Earth where occurs, besides a smaller reduction in the North Pole) begins during the winter night, so there are no solar UV radiation causing it.

    2) During the winter night begins the formation of the Polar Vortex where strong hurrican winds whirl around Antarctica. Nothing gets in, nothing gets out. As there is no UV radiation causing new ozone molecules, the turbulence inside the vortex mekes the zonoe molecuales collide amongst themselves producing 3 O2 molecuales for every two O3 molecules involved in the collision.

    3) Thus, the amount of ozone molecuales is constantle reducing untils very low levels are reached around mid Spetember: that’s the moment when the first sunrays start to reach the top of the stratosphere spliting O2 molecules forming new ozone. And that’s the whole truth about the hard to kill myth.

  7. E.M.Smith says:

    Reads like nice Science Fiction…

    Did they really say that the closing ozone hole fixed global warming? OK, so we can all go back to buying big cars then… /sarc;

  8. nickreality65 says:

    There was this fellow who went next door to visit a new neighbor. As they walked through the house the fellow noticed that every flat surface was covered with pages of newspaper comic strips.

    “Say,” he asked “I’ve never seen this before. What’s the purpose?”

    The new neighbor replied, “It keeps the elephants way.”

    The fellow observed, “Why, there aren’t any elephants around here.”

    “Works good, don’t it?” claimed the neighbor.

  9. Phoenix44 says:

    So how do these clouds and aerosols know to only reflect the bad warming and not the good?

    since the good warming makes up the vast majority of all the warming, surely they are stopping far more good than bad? Which means that that the temperature from the good warming should actually be higher than we thought.

  10. ewing.caldwell says:

    NASA’s website: https://ozonewatch.gsfc.nasa.gov is the “authoritative” source for antarctic ozone hole data.

    Healing? Maybe, maybe not.

    Have to wonder if it it’s tracking solar activity and not CFCs and what affect the moving magnetic poles are having on it all …

  11. Murray Grainger says:

    The linked article is from 2010 – yesterday’s news?

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