18 months ago, in January 2020, I was busy writing my own climate simulation model.
But then I came down with something very like Covid-19, and ended up in hospital for 2 weeks.
Since then I’ve done nothing at all with the model.
Today I set out to try to get the model running again. It was an uphill struggle. I’d completely forgotten what to do,
But eventually I remembered that I needed to run Netbeans, open Glaciation.java, and run the file.
Amazingly, I got it all running. And did a screen capture of the applet window. And uploaded it to WordPress:
It shows the Earth’s continents covered with 2 km of snow and ice, And temperatures in the atmosphere and in layers beneath the surface.
The model is still working! And I’m gradually remembering how it works. It’s like entering a dusty room I’ve not been inside for ages.
Above all, I’m delighted that after 18 months my interest has been rekindled. Why did it take so long?
Main problem is that I’m so short-sighted now that it’s difficult to even read the screen. But I have the same problem writing my blog, and I can manage that.
In this model the snow and ice acts as insulation on the surface of the Earth, and causes it to warm. Eventually this warming causes the snow and ice to melt. In the subsequent interglacial period the surface of the Earth cools, and snow starts to settle once again. So there’s a succession of glacial and interglacial periods, several thousand years long.