Matthew MacDonald
1 min readSep 5, 2019

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Thanks for your response! Some of these are a matter of persuasion (1 & 5), but a few comments/clarifications:

2. Hansen did continue repeating somewhat arbitrary deadlines, including giving a 4-year deadline in his appeal to Obama in 2009. He then set out three things that had to happen (carbon tax, increase nuclear power, etc.), none of which did. I don’t question the bulk of his claims; I only mention this to show his deadlines have passed unmet.

3. When I write about Y2K hysteria, I mean things like this— people spending Dec. 31 stockpiling canned goods. Many store shelves were empty, and the nightly news broadcasts were repeating long-debunked predictions about sudden electronic failures. Of course, I am not claiming that the Y2K date bug (or other date bugs) were made up out of thin air.

4. A distinction without a difference? The infrared radiation is re-emitted from the sun’s solar radiation; obviously, it’s originally from the sun. But I could have been clearer.

6. I called it “educated” guesswork because although we understand the idea of heat capacity very well, how it all plays out at the scale of an ocean is tremendously complex.

7. I could have mentioned many more details about the science of climate change, and this is one more valuable consideration (at least to the best understanding of our current climate models!)

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Matthew MacDonald
Matthew MacDonald

Written by Matthew MacDonald

Teacher, coder, long-ago Microsoft MVP. Author of heavy books. Join Young Coder for a creative take on science and technology. Queries: matthew@prosetech.com

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