Update 19/9

Today we will get through Rossby waves and (possibly) group velocities. Hand in the exercises for chapter 2 on Friday (20/9). Then do exercises 3.1-3.7 for Friday (4/10). The midterm is on 11/10, and will cover material through section 3.5. I will also hand out the cheat sheet for the equations beforehand so you can see those.