1. In 2007 this graph was scary….

    The deviation off the predicted path of arctic ice melt has continued…

    …. and nobody ever talks about the heat of fusion for the conversion of the 0 degree C ice to 0 degree C liquid water.

    I have never seen or heard of anyone who has calculated how much heat it has taken to melt all that arctic ice – not to mention all the other ice we have lost elsewhere in the planet.

    • I forgot this: “Similarly, while ice melts, it remains at 0 °C (32 °F), and the liquid water that is formed with the latent heat of fusion is also at 0 °C. The heat of fusion for water at 0 °C is approximately 334 joules (79.7 calories) per gram, ”

      (from: https://www.britannica.com/science/latent-heat)

      That is enough heat to subsequently warm that 1 gram of water from 0 C. to 79.7 C.

  2. Nice points Bill, and thanks for the links – I had not seen those graphs.

    This is about when you realize that little things like switching from old-style light-bulbs to eco-friendly bulbs would realistically not make any difference whatsoever. I’ve also thought how notable it is that the accumulation curve for of carbon dioxide in the atmosphere seems to have seems to have completely disregarded all of the international agreements, from Kyoto onward. If anything the accumulation rate has accelerated. Atmospheric carbon dioxide is just being openly disrespectful of all that important policy work.

    I think you’re right too that the underlying driver is really population, with the size of effects orders-of-magnitude larger than the sum of all hopeful and possible responses…

    – Nick

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