SP11%20Ch8%20%20Air%20Masses%2C%20Fronts%20_%20Mid%20Lat%20Cyclones

SP11%20Ch8%20%20Air%20Masses%2C%20Fronts%20_%20Mid%20Lat%20Cyclones

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Ch. 8 Air Masses, Fronts, & Middle-Latitude Cyclone Air Masses ± Extremely large bodies of air whose temperature and humidity are similar horizontally and vertically. ± Source Regions: area where air mass originates, usually flat and uniform composition with light surface winds ± Classification based upon temperature and humidity ± P = polar ± T = tropical ± A = Arctic ± m = maritime ± c = continental What kind on air mass is associated with a given type of weather in a given region and time of year? Fronts - Transition zone between two air masses of different densities ± Identification on Charts 1. Sharp temperature change 2. Sharp change in dew point 3. Shift in wind direction 4. Sharp pressure change 5. Clouds and precipitation ± Stationary Front - Front with no movement - Alternating red and blue line with blue triangles and red semi-circles - Winds parallel but opposite direction - Variable weather ± Cold Front - Cold, dry stable air replaces warm, moist unstable air - Blue line with blue triangles
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 2

SP11%20Ch8%20%20Air%20Masses%2C%20Fronts%20_%20Mid%20Lat%20Cyclones

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online