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davelevitan's profile
Dave Levitan
Dave Levitan
Dave Levitan
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@davelevitan

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Dave LevitanVerified account

@davelevitan

Writes stuff, something new coming. Bylines all over the place. Science, climate, politics, etc. Author: NOT A SCIENTIST (WW Norton, 2017)

davelevitan.com
Joined February 2009

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    Dave Levitan‏Verified account @davelevitan 2 Dec 2019

    I decided to do a bit of a close read of one particular part of a 1965 report sent to Lyndon Johnson, on atmospheric carbon dioxide. Because I hate myself, you see.http://www.climatefiles.com/climate-change-evidence/presidents-report-atmospher-carbon-dioxide/ …

    7:24 PM - 2 Dec 2019
    • 574 Retweets
    • 1,009 Likes
    • 🌹PlatinumBubble🌹 Mariano Alvarez Heather Christenson Shane L. Larson Astronaut Cum Evangelist 🇬🇷🇵🇸 Fro Ramirez Miravus Ashley I. Matthew
    30 replies 574 retweets 1,009 likes
      1. New conversation
      2. Dave Levitan‏Verified account @davelevitan 2 Dec 2019

        They acknowledge that at that point, firm predictions were hard. Okay. But also, this ⬇️. [mashes calculator furiously] [checks current CO2 concentration] Ah, well, shit.pic.twitter.com/AXJcaWzZT6

        3 replies 35 retweets 202 likes
        Show this thread
      3. Dave Levitan‏Verified account @davelevitan 2 Dec 2019

        They knew, in 1965, that the 1885-1940 increase in CO2 likely led to half a degree C of warming. Which uh, maybe should have raised a few more alarm bells?pic.twitter.com/BzpP1echcr

        1 reply 92 retweets 303 likes
        Show this thread
      4. Dave Levitan‏Verified account @davelevitan 2 Dec 2019

        It would take 4,000 years to melt the Antarctic ice sheet. But a 25% increase in CO2 concentration (see previous “ah well shit” tweet) could reduce that to 400 years. Also we’re past that 25% mark. So.pic.twitter.com/loOROPaqnN

        1 reply 46 retweets 229 likes
        Show this thread
      5. Dave Levitan‏Verified account @davelevitan 2 Dec 2019

        Is 40 feet per century badpic.twitter.com/ZTzzFrBwkL

        4 replies 26 retweets 167 likes
        Show this thread
      6. Dave Levitan‏Verified account @davelevitan 2 Dec 2019

        “Through his worldwide industrial civilization, Man is unwittingly conducting a vast geophysical experiment.” Okay yes but what’s the cutoff for “unwittingly” can we at least say that past 1965 it was wittingly.

        3 replies 51 retweets 327 likes
        Show this thread
      7. Dave Levitan‏Verified account @davelevitan 2 Dec 2019

        At that time, all recoverable fossil fuels could increase by TWO HUNDRED PERCENT from then level of 320 ppm. We have found WAY MORE fossil fuels that we now consider recoverable since 1965.pic.twitter.com/CMPGcKUb2S

        1 reply 23 retweets 145 likes
        Show this thread
      8. Dave Levitan‏Verified account @davelevitan 2 Dec 2019

        Oh they also had some early geoengineering ideas. Yay. They suggested changing the planet's albedo by dumping buoyant, reflective particles in the ocean for $500 million/year (~$4 billion today, so, around what solar radiation management is generally pegged at).pic.twitter.com/ZTMaXVAfrD

        6 replies 14 retweets 114 likes
        Show this thread
      9. Dave Levitan‏Verified account @davelevitan 2 Dec 2019

        Conclusion time: “The climatic changes that may be produced by the increased CO2 content could be deleterious from the point of view of human beings.” YOU DON’T SAY.

        1 reply 41 retweets 257 likes
        Show this thread
      10. Dave Levitan‏Verified account @davelevitan 2 Dec 2019

        Well, that was fun. Some of the best scientists in the country told the president a full 54 years ago that burning fossil fuels indiscriminately was going to wreck our collective shit, and, well, [gestures around].

        7 replies 167 retweets 472 likes
        Show this thread
      11. Dave Levitan‏Verified account @davelevitan 2 Dec 2019

        Oh, also: this report was put together by the President’s Science Advisory Committee, or PSAC, which was later replaced by the President’s Council of Advisors on Science and Technology, or PCAST. You will be SHOCKED to learn that the current president does not even HAVE a PCAST.

        9 replies 50 retweets 277 likes
        Show this thread
      12. Dave Levitan‏Verified account @davelevitan 2 Dec 2019

        Dave Levitan Retweeted Dave Levitan

        If you enjoyed/were enraged by this one, check out my earlier reading of a 1983 EPA report which, uh, also maybe suggested we should have dealt with this whole thing a bit sooner:https://twitter.com/davelevitan/status/1100141281332940802 …

        Dave Levitan added,

        Dave LevitanVerified account @davelevitan
        For… reasons… I am reading a 1983 EPA report titled “Can We Delay a Greenhouse Warming?” and it is inCREDible. Stunning consistency since then: “Current estimates suggest that a 2 degrees C increase could occur by the middle of the next century… 5 degrees C increase by 2100” pic.twitter.com/KhMYh7bCQG
        Show this thread
        3 replies 60 retweets 201 likes
        Show this thread
      13. Dave Levitan‏Verified account @davelevitan 2 Dec 2019

        Since you’re here, I would love it if you would sign up for this newsletter, where I write about science and policy and infuriating things once a week or so. Next one will be on the 2009 UN climate meeting and the not-so-great decade that followed it.https://gravityisgone.substack.com 

        3 replies 8 retweets 77 likes
        Show this thread
      14. Dave Levitan‏Verified account @davelevitan 2 Dec 2019

        Ok ONE MORE THING: President Johnson REQUESTED this report from his PSAC. This is in LBJ's intro/request letter. Just try and picture something like this coming from the White House today:pic.twitter.com/8oT4HW6oyv

        5 replies 22 retweets 115 likes
        Show this thread
      15. Dave Levitan‏Verified account @davelevitan 3 Dec 2019

        Whew, as @Conch_Out has pointed out, Trump finally DID appoint a PCAST! Last month! 3 years into his term! And it includes 7 people so far! Including execs from Bank of America, IBM, Johnson & Johnson, HP, and Dow Chemicals! Sorry I was behind on this!https://www.aip.org/fyi/2019/trump-reconstitutes-president%E2%80%99s-council-advisors-science-and-technology …

        5 replies 11 retweets 80 likes
        Show this thread
      16. End of conversation

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