Isaac Held again. Though nobody cared last time. A reminder that you can do basic interesting things with GCMs; that abstract thinking on problems can be illuminating; and that atmospheric dynamics is more complicated than you thought.
The video is from his blog; it shows “tropical cyclones” via their wind speed over a month of simulation on an [[f plane]] representation. Its a very heavily idealised model: SST is constant, there is no land, and the Coriolis parameter is a constant. And they find that in those circumstances, the model fills up with long-lived “tropical cyclones”. The real world doesn’t fill up with these things, rather fortunately, because they would either landfall or drift out of the tropics; or because they’d suck up the available energy and cool the SSTs. That aspect wasn’t explored; it would be interesting to.
[Update: anyone who really wanted to talk about Sherwood et al. “Spread in model climate sensitivity traced to atmospheric convective mixing” should head off to RC, ‘cos Gavin has actually read it. Unlike that lazy Dr Annan.]