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James Hansen’s latest PowerPoint presentation

By Joe Romm  

"James Hansen’s latest PowerPoint presentation"

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Would you like to borrow a slide or two from our top climate scientist? Here is his June 3 presentation, “Climate Threat to the Planet: Implications for Energy Policy” (or PDF here) at the PACON 2008 conference (rough gig you got there, Jim) Climate Change: Innovative Approaches to Solving Today’s Problems.

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16 Responses to James Hansen’s latest PowerPoint presentation

  1. David B. Benson says:

    Joe — Could you kindly post a url to the .pdf file? I’d like to be able to copy that to some other blogging places. Thanks.

  2. manacker says:

    Is this the same James E. Hansen …

    [JR: Rest of email is deleted disinformation.]

  3. Joe says:

    Click on “here” in post for PDF.

  4. hapa says:

    there were too many instances of “300-325″ in those slides for me to sleep well tonight.

    (IMHE one-word links get lost when link color and text color are close.)

  5. Nylo says:

    I like the last slide, where basically he says that the scientific community is not reasonable regarding sea-level change. “Don’t listen to them. Listen to me”.

  6. hapa says:

    well when blocks of ice the size of cities are falling off and some experts refuse to sign off on anything more than thermal expansion, “reticence” is a pretty good word for it, in polite company.

  7. Nylo says:

    the “blocks of ice the size of cities” together with the termal expansion have provoked a sea level increase of an “astonishing” 22cm in the whole 20th century. Not too bad for a 0.7ºC increase.

  8. caerbannog says:


    # Nylo Says:
    June 6th, 2008 at 2:00 am

    I like the last slide, where basically he says that the scientific community is not reasonable regarding sea-level change. “Don’t listen to them. Listen to me”.

    I attended a lecture given by Prof. Jeff Severinghaus at the Scripps Institution of Oceanography (he’s one of their glacier/paleoclimate experts). During the Q&A session, he was asked how much he thought sea-levels would most likely rise over the next century. His answer? Two to six feet.

    So Hansen may be bit out there with his projections, but not that far out there. And he makes a credible case for his opinion, even though his opinion “pushes the envelope”. This is in contrast to the deniers, who never make a credible case for anything they claim.

    Folks who specialize in climate/paleoclimate research relevant to sea-level predictions generally think that the IPCC’s numbers are too conservative. They don’t necessarily buy into several meters this century, but they *do* see the real likelihood of a meter or two this century, with many more meters of sea-level rise in the following centuries.

    And that would be a (slow-motion) disaster for the global economy.

  9. hapa says:

    no, no, the big chunks leaping to their deaths aren’t a sign of current sea rise, but a signal from the ice sheets that they’re tired of the debate and have already made other plans. a price signal, if you will.

  10. Dano says:

    The “blocks of ice the size of cities” together with the termal expansion have provoked a sea level increase of an “astonishing” 22cm in the whole 20th century.

    Yes, not astonishing especially since the ice is already in the sea.

    Best,

    D

  11. Paul K says:

    Isn’t thermal expansion the main cause of rising sea level?

  12. David B. Benson says:

    Jon — Thank you for the urls.

    Paul K — So far, yes.

  13. paulm says:

    Could JH be the second coming of the savior!

    He seems to be doing more than humanly possible to get us thought the heat.

    (ps I have just seen pics of the most enormous icebergs floating of Newfound Land, Canada. Could GW have an impact on the size of these things. Would pass on but don’t know the @ rights)

  14. paulm says:

    Further to my ref of large icebergs floating of Newfound Land and whether GW might have something to do with the size – well this report ….

    ‘Unprecedented’ Warming Drives Dramatic Ecosystem Shifts In North Atlantic, Study Finds…”
    http://www.sciencedaily.com/releases/2008/11/081106153534.htm

    that
    “..melting Arctic ice sheets and glaciers have periodically released cold, low-salinity slugs of water from the Arctic Ocean into the North Atlantic.”

    It may very well be the case that larger icebergs are able to float further south before breaking up because of the pulses of cold fresh water releases from the arctic.

    sea also
    http://global-warming.accuweather.com/2008/11/shifting_ecosystems_being_driv_1.html

  15. Dat Duthinh says:

    Dr. Hansen:

    I read your 2007 paper in Proc. Royal Society and liked it very much. I am very impressed with the close agreement between calculated results from computer modelling and measurements, going back 800 ky. You listed the forcings, such as GHG, albedo, etc. But aren’t the greatest forcings changes in earth orbit and precession of earth axis, as shown in the ice core data of the last 800 ky? If your model matches observations closely, then surely the model must include such forcings. Do we have a good handle on the periodicity of such non-human related phenomena, and are we not due for a major glacial age, given the trend in the ice core data? I am not advocating that we can rely on such an event, which takes place in a time scale of 100 ky, to alleviate our global warming problem, which takes place in 100 y, but I was surprised not to see a discussion of this in your paper. Am I missing something?

    PS I admire your work.