1 / 19

Chapter 20

Chapter 20. Weather. Section 20.1. Meteorology- study of weather. Air mass: - large body of air, in the lower troposphere. -May be several kilometers in diameter and height -has similar temperature and humidity through out the air mass.

keene
Télécharger la présentation

Chapter 20

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chapter 20 Weather

  2. Section 20.1 • Meteorology- study of weather

  3. Air mass: - large body of air, in the lower troposphere. -May be several kilometers in diameter and height -has similar temperature and humidity through out the air mass

  4. -the temperature and humidity of the air mass depends on where the air mass originates -air masses from the poles are cold and air masses from the tropics are warm. -Air masses formed over land will be dry - Air masses formed over water will be humid

  5. As an air mass moves, the temperature will begin to change ex: Air masses moving south from Canada will slowly warm up

  6. 5 types of air masses • Classified by where they originate -Temperature is determined by where it began: -Arctic, Polar, or Tropical -Humidity is determined if air mass began over sea (maritime) or over land (continental)

  7. Continental Arctic cA • Originates over arctic land • Extremely cold, it may warm up slightly • Very dry air

  8. Continental Polar cP • Originates over Alaska and Canada • A bit warmer than cA • Air is dry, but it will pick up moisture as it passes over the great lakes, bringing snow on the other side. This is called lake effects snow

  9. Maritime Polar mP • Originates over ocean in high latitudes so it is cold and damp • b/c the ocean is warmer than the continents the mP air masses are slightly warmed than the cP air masses

  10. These air masses cause the fog and damp weather on the west coast. • mP air masses from the Northern Atlantic may cause Nor’easters on the east coast

  11. Maritime tropical mT • Air masses over warm topical oceans • Air is warm and humid • Can cause summer time thunder storms

  12. Continental Tropical cT • Originates over hot and dry deserts • May begin as a maritime air mass, but becomes dry as it passes over a mountain range • In the summer it creates heat waves w/o thunderstorms • Can cause drought conditions

More Related