ATM OCN (Meteorology) 100
ATMOSPHERIC PRESSURE:A FUNDAMENTAL WEATHER ELEMENT
Lecture #2-B scheduled for:
15 JUN 2004 (T)
Recommended Readings from Moran (2002):
pages 93-102, 105-107.
Today's Lecture Objectives:
- To define and describe the concept of air pressure.
- To list the types of barometers.
- To describe the principles of the mercury and aneroid barometers, listing their respective advantages.
- To list typical values and the observed extreme ranges of surface barometric pressure.
- To describe why and how the pressure changes with increasing altitude in the earth's atmosphere, ranging from the earth's surface to a height of several hundred kilometers.
- To explain why station pressure readings are "reduced" to mean sea level.
- To explain the fundamental causes for the difference between surface high and low atmospheric pressure cells.
- To explain the significance of air pressure tendency for local weather forecasting.
- To describe how altitude can be determined from a pressure altimeter.
B. BASIC CONCEPTS - ATMOSPHERIC PRESSURE
- What is Pressure?
- Importance of Air Pressure
- The Science of Barometry
- Types of Barometers
- Mercury Barometers
- Aneroid Barometers
- Placement of Barometers
- Pressure Units
D. THE CLIMATOLOGY OF ATMOSPHERIC PRESSURE
- Spatial Variation in Atmospheric Pressure
- Variation of Pressure with Time
- Variation of Atmospheric Pressure with Height
E. ALTIMETRY - A SPECIAL APPLICATION
- The altimeter
- The background
Links to Other References:
Latest revision: 17 June 2004 (1235 UTC)
Produced by Edward J. Hopkins, Ph.D.
Department of Atmospheric and Oceanic Sciences
University of Wisconsin-Madison Madison, WI 53706