NATS 101

Lecture 17
Curved Flow and Friction

Supplemental References for TodayÕs Lecture


	Gedzelman, S. D., 1980: The Science and Wonders of the Atmosphere. 535 pp. John-Wiley & Sons. (ISBN 0-471-02972-6)

Recall: Uniform Circular Motion Requires Acceleration/Force

Flow Around Curved Contours

Forces for Curved Flow

Gradient Wind Balance

Divergence and Convergence

Vertical Motion

Slide 11

Force of Friction 1

Force of Friction 2

Force of Friction 3

Force of Friction 4

Force of Friction 5

Flow at Surface Lows and Highs

Friction Induced Vertical Motion

Summary


	Curved Flow
	Requires Centripetal Acceleration
	Difference between PGF and Coriolis Force
	Speed Changes => Convergence-Divergence
	Frictional Force
	Causes Winds to Turn toward Low Pressure Important in the lowest 1 km above the Surface Leads to Convergence-Divergence
	Curvature and Friction
	Leads to Vertical Motions

Next Lecture


	Local Winds with Diurnal or Shorter Times
	Land-Sea Breeze
	Mountain-Valley Breeze
	Charles Darwin was Right
	Darwin ÒNatural SelectionÓ Award

Assignment for Next Lecture