ATM OCN (Meteorology) 100
WIND: PART II - THEORY & FUNDAMENTAL FORCES
Lecture #14 Scheduled for:
8 JUL 2004 (R)
Recommended Readings from Moran (2002):
Today's Lecture Objectives:
- To briefly describe Newton's three laws of motion.
- To describe the relationship between the observed winds and the horizontal atmospheric pressure field pattern, relating the spacing of isobars to the speed of wind.
- To identify the various forces that could act upon an air parcel to initiate, maintain and modify atmospheric motion.
- To explain why gravity only influences vertical motion and not horizontal motion of air.
- To describe the factors that influence the magnitude and direction of the pressure gradient force and its components - the horizontal and vertical pressure gradient force.
- To describe the influence of the Coriolis effect upon free-moving objects or fluids and list two factors that influence the magnitude of this effect.
- To describe the effect of friction upon the speed and direction of the horizontal surface winds and identify two factors influencing the magnitude of the friction force.
- To distinguish between centripetal force and centrifugal force and describe the factors that influence the magnitude and direction of the centripetal force.
B. CONCEPTS OF THE WIND - EXPLANATIONS OF ATMOSPHERIC MOTION
- Practical Problems
- Historical Concepts
- The Forces of Motion & Newton's Laws
- Implications of the Newtonian Laws
- Vectors, Forces and Units
B. FORCES ASSOCIATED WITH ATMOSPHERIC MOTION
- Reasons for Atmospheric Motions
- Complications involved with Atmospheric Motion
- Three Dimensional Equation of Motion for the Atmosphere
- The Forces
- Pressure Gradient Force
- Gravitational Force or Gravity
- Coriolis Effect or "Force"
- Frictional Force or Friction
- Centripetal Force
Links to Other References:
The Forces & Wind module from Weather World 2010 (Univ. of Illinois-Urbana-Champaign). Check the mpg file that shows apparent motion on a rotating turntable (to simulate the Coriolis effect).
Produced by Edward J. Hopkins, Ph.D.
Department of Atmospheric and Oceanic Sciences
University of Wisconsin-Madison Madison, WI 53706
Latest revision: 26 July 2004 (0320 UTC)