Record cold and snow in Brazil

Discussion in 'Earth Science' started by sculptor, Aug 1, 2021.

  1. Beaconator Valued Senior Member

    Dinosaur farts make the world cold.
    Not the cold war.

    Hey wouldn’t sending all out nukes into space make the world cold again just for the potential heat they could have created?
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  3. sideshowbob Sorry, wrong number. Valued Senior Member

    You're demonstrating that pretty well.

    "Bad things have always happened" is an excuse that has not been thought through. Ships have always sunk, so there's no need for lifeboats. Fires have always happened, so there's no need to put them out.
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  5. iceaura Valued Senior Member

    Boomerangs are not weapons - they are training and entertainment devices (a fun way for children to learn how to throw).
    Are you learning anything?
    That isn't true.
    Is Brit medical care really that cheap?
    Never before like this (warming this rapidly) - the closest would be a very large meteor strike, a couple of which were even faster than AGW (with disastrous effects) but all of them shorter lived (the damages of course lasted a long time).

    Who's telling you this stuff, and why are you listening to them?
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  7. iceaura Valued Senior Member

    For the information of those interested in whether we are currently in a long or extended interstade, or a warm spell similar to Mis 11 in the Northern Hemisphere, the August 27 issue of Science magazine has a really interesting modeling report that seems to show we are.
  8. sculptor Valued Senior Member

  9. iceaura Valued Senior Member

    Authors: Q Z Yin, Z P Wu, A Berger, H Goose, D Hodel. (None familiar to me off hand, but recognizable - not fringe)
    "Science", 2021 p. 1035, under "Paleoclimate",
    heading "Insolation triggered abrupt weakening of Atlantic circulation at the end of interglacials"

    That heading may confuse - the news is that they identified a probable tipping point or "threshold" level crossed by cyclically decreasing insolation, below which sea ice feedback from the Labrador and Nordic seas suddenly (in geo time) jumps the northern hemisphere climate to a different equilibrium state featuring high amplitude variations around a lower mean temperature (the glaciers and ice caps come back, the weather goes to extremes).

    And that appears to be how interglacials have been ending over the past 800k years or so.

    "The ubiquity of this threshold suggests its fundamental role in terminating the warm climate conditions at the end of interglacials" (from the abstract).
  10. Walter L. Wagner Cosmic Truth Seeker Valued Senior Member

    water vapor can change from volcanic eruptions, metorite impacts in the sea, etc. which can eject water quite high on a short-term basis; but overall it does remain steady-state
  11. Walter L. Wagner Cosmic Truth Seeker Valued Senior Member

    In my estimation, the surepetitious f-gas (fluorinated hydrocarbons, etc.) releases from China and elsewhere, coupled with the methane releases globally (from oil wells, etc., far exceed the warming capability of co2. It would be shame for society to target the wrong culprit.
  12. billvon Valued Senior Member

    Nope. They are significant but are not the most significant. Good chart below. NOTE!!! This is NOT total greenhouse contributions from each gas! This is the _forcing_ (or change to the baseline) that all those gases provide.

    Attached Files:

    exchemist likes this.
  13. Walter L. Wagner Cosmic Truth Seeker Valued Senior Member

    I believe the f-gas is widely underestimated, due to surreptitious releases (China, et al.), existing systems still leaking, and underestimation of parent gas which decays into 10-fold higher warming daughter gases which are not included in estimates. I also believe the co2 is widely overestimated.
  14. Facial Valued Senior Member

    Well, when "you believe" something, that needs to be supported with credible evidence. The same physics of CO2 that powers steel-cutting lasers also powers global warming.

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