Xkcd comic dating age

19-Mar-2019 23:19

If the solid line represents thermometer measurements, what does the earlier dotted line represent?

It represents estimates of global temperature based on “proxy” measurements.

The problem is that these proxies tend to also vary with factors other than temperature and can be affected by things like rainfall or sheep grazing.

So the temperature estimates they give us are very rough.

Now we understand the strange, flat, featureless character of that dotted line.Today’s xkcd comic features a reference to the Long Now’s dating system in the “secret” mouseover text (hover over the image to read).Those that wish to be early adopters and start using 10k compliant dates now, please refer to our recent post on how to configure your computer’s date interface.But it comes from using a misleading comparison between two very different kinds of data, and grafting them onto unreliable future predictions.Here is a corrected, non-misleading version of the same cartoon.

Now we understand the strange, flat, featureless character of that dotted line.

Today’s xkcd comic features a reference to the Long Now’s dating system in the “secret” mouseover text (hover over the image to read).

Those that wish to be early adopters and start using 10k compliant dates now, please refer to our recent post on how to configure your computer’s date interface.

But it comes from using a misleading comparison between two very different kinds of data, and grafting them onto unreliable future predictions.

Here is a corrected, non-misleading version of the same cartoon.

These are the only temperatures that actually veer way outside of the normal range of the past 11,000 years. There’s reason to believe they’re not very good guesses.