Dr. James Hansen is the Director of the Goddard Institute for Space Studies. Dr. Hansen is right up there with Al Gore, Michael Mann and the Climategate CRU on the list of people helping the UN to swindle the United States and other western democracies out of trillions of dollars through his promotion of the Anthropogenic Global Warming fraud.
Hansen kind of got the ball rolling in 1988 with his publication of a climate model that predicted dire global warming over the next 20 years if mankind did not stop burning fossil fuels… Hansen et al. 1988.
Hansen constructed three scenarios… “Scenario A assumes continued exponential trace gas growth, scenario B assumes a reduced linear linear growth of trace gases, and scenario C assumes a rapid curtailment of trace gas emissions such that the net climate forcing ceases to increase after the year 2000.”
Abstract
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From Appendix B, pg. 9361 of Hansen’s 1998 paper…
“Specifically, in scenario A CO2 increases as observed by Keeling for the interval 1958-1981 [keeling et al, 1982] and subsequently with a 1.5%/yr growth of the annual increment.”
“In scenario B the growth of the annual increment of CO2 is is reduced from 1.5%/yr today to 1%/yr in 1990, 0.5%/yr in 2000 and 0 in 2010; thus after 2010 is constant, 1.9 ppmv/yr.”
“In scenario C the CO2 growth is the same as scenarios A and B through 1985; between 1985 and 2000 the annual increment is fixed at 1.5 ppmv/yr; after 2000, CO2 ceases to increase, its abundance remaining fixed at 368 ppmv.”
If I take the average annual increment from 1958-1981 and increase it by 1.5% per year until 2008, I get 385.35 ppmv. The Mauna Loa Observatory’s value for 2008 is 385.57 ppmv.
When I constructed CO2 curves using Hansen’s scenario assumptions and I compare his scenarios to the actual CO2 data recorded since 1988, I get an almost exact match to Scenario “A”…
Here is a copy of Hansen’s 1988 model with the actual satellite derived temperature (UAH Lower Troposphere) data from Dec. 1979 to November 2009 overlaid…
Hansen’s scenarios “A” and “B” predicted a temperature anomaly about 1.0°C by 2009. Scenario “C” predicted an anomaly of about 0.7°C by 2009. Since Hansen’s publication, atmospheric CO2 levels have tracked Scenario “A” and CH4 levels have tracked Scenario “C”. Even though CH4 is a more potent greenhouse gas, it accounts for only a tiny fraction of the greenhouse effect:
CO2 is the “Big Kahuna”. Even if CH4 has 20X the greenhouse effect of CO2. 1800 ppb is 0.46% of 390 ppm…20 X 0.46% = 9.2%. At most, CH4 accounts for only about 10% of the greenhouse effect of CO2 in Earth’s current atmosphere.
So, according to Hansen’s 1988 predictions, the global temperature anomaly should be about 90% of the way from Scenario “C” to Scenario “A”… ~0.97°C. In reality, the global temperature anomaly is about half of what Hansen predicted for a similar rise in greenhouse gases.
The actual warming has been slightly less than Hansen’s Scenario C…
“In scenario C the CO2 growth is the same as scenarios A and B through 1985; between 1985 and 2000 the annual increment is fixed at 1.5 ppmv/yr; after 2000, CO2 ceases to increase, its abundance remaining fixed at 368 ppmv.”
In most branches of science, when experimental results falsify the original hypothesis, scientists discard or modify the original hypothesis. In Hansen’s case, he just pitches the story with zealotry rarely seen outside of lunatic asylums…
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Addendum…
In fairness to Dr. Hansen, here’s how his GISTEMP surface temperature data stack up against his model…
Even GISTEMP is running cold relative to the scenario in which CO2 was held steady at 368 ppmv after the year 2000.
July 17, 2010 at 11:53 |
[…] […]
June 16, 2011 at 15:39 |
Posted by The Barbarian…
Well, Barbie… Why are you using a Hansen chart that ends in 2005?
If we use Hansen’s latest GISTEMP surface data we get pretty well the same result as we get with the satellite data. GISTEMP runs at or below Scenario C over most of the last decade.
October 13, 2011 at 16:48 |
[…] Back in 1988, he published a climate model that, when compared to his own temperature data, substant… […]
February 27, 2013 at 11:03 |
[…] in a scenario in which CO2 remains at the same level as it was in 2000. This is reminiscent of Hanson’s failed 1988 model. The IPCC forecast more warming in a steady-state CO2 world than has actually occurred since […]
February 27, 2013 at 12:53 |
[…] in a scenario in which CO2 remains at the same level as it was in 2000. This is reminiscent of Hanson’s failed 1988 model. The IPCC forecast more warming in a steady-state CO2 world than has actually occurred since […]
December 14, 2013 at 09:14 |
[…] Back in 1988, he published a climate model that, when compared to his own temperature data, substant… […]
December 14, 2013 at 11:50 |
[…] 3) The Warmists have already proven that AGW is wrong – Part Trois: That pesky climate sensitivity thing. Gorebot Prime, James Hansen, formerly of NASA-GISS and now a full-time political activist, first proved that AGW was wrong 25 years ago and then delivered an endless stream of idiotic alarmism. Back in 1988, he published a climate model that, when compared to his own temperature data, substant… […]
March 17, 2015 at 02:01 |
[…] Back in 1988, he published a climate model that, when compared to his own temperature data, substant… […]