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fchollet's profile
François Chollet
François Chollet
François Chollet
Verified account
@fchollet

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François CholletVerified account

@fchollet

Deep learning @google. Creator of Keras. Author of 'Deep Learning with Python'. Opinions are my own.

United States
fchollet.com
Joined August 2009

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    1. Michael Nielsen‏ @michael_nielsen 10 Dec 2019

      Fascinating little historical tidbit on climate, from the 1953 New York Times: http://www.millenniumbulkeiswa.gov/comments/MBTL-EIS-0003176-60867.pdf …pic.twitter.com/tklS10Sibz

      4 replies 29 retweets 109 likes
    2. François Chollet‏Verified account @fchollet 10 Dec 2019
      Replying to @michael_nielsen

      Wasn't this already understood (if not accurately quantified) by the late 1800s / early 1900s?

      1 reply 0 retweets 1 like
    3. Michael Nielsen‏ @michael_nielsen 10 Dec 2019
      Replying to @fchollet

      Not really. This is a nice account of some of the confusions of the time: http://www.realclimate.org/index.php/archives/2007/06/a-saturated-gassy-argument … http://www.realclimate.org/index.php/archives/2007/06/a-saturated-gassy-argument-part-ii … The references go into more detail.

      1 reply 0 retweets 4 likes
    4. Michael Nielsen‏ @michael_nielsen 10 Dec 2019
      Replying to @michael_nielsen @fchollet

      I've also seen histories that emphasize different aspects, but the broad takeaway is similar - we understood some of the core physics in the 1800s (Fourier, Tyndall, Arrhenius), but also missed some of the core physics until the 1950s and 1960s.

      1 reply 0 retweets 2 likes
    5. Michael Nielsen‏ @michael_nielsen 10 Dec 2019
      Replying to @michael_nielsen @fchollet

      Perhaps not surprising - the earth didn't really warm from the 1940s to the 1970s (possibly due to increased aerosol cooling). Wallace Broecker's 1975 paper coining "Global Warming" looks prophetic now: it came at the time when GHG heating started to outstrip aerosol cooling

      2 replies 0 retweets 2 likes
    6. Michael Nielsen‏ @michael_nielsen 10 Dec 2019
      Replying to @michael_nielsen @fchollet

      (All with the caveat that I don't yet understand the history very well.)

      3 replies 0 retweets 0 likes
      François Chollet‏Verified account @fchollet 10 Dec 2019
      Replying to @michael_nielsen

      Got it. I think I was remembering a story about Arrhenius.

      10:50 PM - 10 Dec 2019
      • 1 Like
      • joao
      1 reply 0 retweets 1 like
        1. New conversation
        1. Timothy D. Chase‏ @TimothyChase 11 Dec 2019
          Replying to @fchollet @michael_nielsen

          I'm a bit of a fan of John Tyndall myself. My on the greenhouse effect: http://climate-guardian.com/avatar  (best viewed on a laptop or desktop). He is under history. He was able to measure the absorption of infrared by separate greenhouse gasses, predicted global warming in 1859.

          1 reply 0 retweets 0 likes
        2. Timothy D. Chase‏ @TimothyChase 11 Dec 2019
          Replying to @TimothyChase @fchollet @michael_nielsen

          I link to his paper, but a number of the NASA climate links are stale. The Trump-appointed head of NASA... I'm pretty sure someone has them backed up somewhere though.

          0 replies 0 retweets 0 likes
          3. End of conversation

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