@ClimateOfGavin @theresphysics @aDissentient 1/7》Gavin, that graph is irrelevant to CFC's "greenhouse" effect.
The greenhouse effect is from intact CFC molecules in the troposphere, NOT due to stratospheric chlorine. Ozone-depleting stratospheric Cl is only released when CFC molecules break down.
@ClimateOfGavin @theresphysics @aDissentient 2/7》The Montreal Protocol's slow effect on stratospheric Cl is because CFCs break down VERY slowly, and THAT's what releases stratospheric Cl.
The unamended 1987 Montreal Protocol reduced CFC production & use to ZERO by 12/31/1995 (except developing countries w/ low CFC use):
@ClimateOfGavin @theresphysics @aDissentient 3/7》Hansen88's "Scenario A" preposterously projected indefinite EXPONENTIAL GROWTH in CFC emissions.
On 6/23/1988 Hansen testified to Congress that Scenario A was "business as usual." That was remarkably dishonest.
sealevel.info/Hansen_says_sc…
@ClimateOfGavin @theresphysics @aDissentient 4/7》Neither the paper nor Hansen's testimony mentioned that Scenario A was not only NOT "business as usual," it was actually IMPOSSIBLE.
Gavin, you obviously KNOW that what Hansen told Congress was untrue. In fact, YOUR OWN graph calls "Scenario B" (not A!) business-as-usual.
@ClimateOfGavin @theresphysics @aDissentient 5/7》So admit it: Hansen deliberately misled Congress. (Yet the chances are zero that he'll be sharing a cell with Steve Bannon.)
His paper's famous 0.5 °C/year warming projection was based on Scenario A, which, by 1988, EVERYONE involved knew was IMPOSSIBLE.
@ClimateOfGavin @theresphysics @aDissentient 6/7》Of course, Hansen et al 1988 also got nearly everything else of consequence wrong.
@ClimateOfGavin @theresphysics @aDissentient 7/7》Hansen1988 was a dog's dinner of errors, but it served its purpose, which was to gin up alarm about global warming, and build support for creating & funding the IPCC & related initiatives.
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