Atmospheric processes
Download
1 / 8

Atmospheric Processes - PowerPoint PPT Presentation


  • 70 Views
  • Uploaded on

Atmospheric Processes. Air Movements Surface Winds Pressure Systems Characteristics of high & low pressure systems Influence of high & low pressure systems on weather patterns Air Masses. What if…. The earth was not tilted 23.5° on its axis? It did not rotate once every 24 hours?

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Atmospheric Processes' - imani-stevens


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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Atmospheric processes
Atmospheric Processes

  • Air Movements

  • Surface Winds

  • Pressure Systems

    • Characteristics of high & low pressure systems

    • Influence of high & low pressure systems on weather patterns

  • Air Masses


What if
What if….

  • The earth was not tilted 23.5° on its axis?

  • It did not rotate once every 24 hours?

  • It did not orbit the sun?


Atmospheric processes

  • Hadley cell - Low latitude air movement toward the equator that with heating, rises vertically, with poleward movement in the upper atmosphere. This forms a convection cell that dominates tropical and sub-tropical climates.

  • Ferrel cell - A mid-latitude mean atmospheric circulation cell for weather named by Ferrel in the 19th century. In this cell the air flows pole-ward and eastward near the surface and equator-ward and westward at higher levels.

  • Polar cell - Air rises, diverges, and travels toward the poles. Once over the poles, the air sinks, forming the polar highs. At the surface air diverges outward from the polar highs. Surface winds in the polar cell are easterly (polar easterlies).

Air Movements

Between each of these circulation cells are bands of high and low pressure at the surface. The high pressure band is located about 30° N/S latitude and at each pole. Low pressure bands are found at the equator and 50°-60° N/S.


Surface winds
Surface Winds that with heating, rises vertically, with poleward movement in the upper atmosphere. This forms a convection cell that dominates tropical and sub-tropical climates.

Air moves from HIGH to LOW pressure – variable speed and direction but have an overall global pattern

Roaring

Forties

Doldrums

Horse

Latitudes

Remember – Coriolis Effect – these winds are deflected


Atmospheric processes1
Atmospheric Processes that with heating, rises vertically, with poleward movement in the upper atmosphere. This forms a convection cell that dominates tropical and sub-tropical climates.

  • Air Movements

  • Surface Winds

  • Pressure Systems

    • Characteristics of high & low pressure systems

    • Influence of high & low pressure systems on weather patterns

  • Air Masses


Pressure systems
Pressure Systems that with heating, rises vertically, with poleward movement in the upper atmosphere. This forms a convection cell that dominates tropical and sub-tropical climates.

Atmospheric pressure systems are areas of the atmosphere with relatively high or low barometric (air) pressure

Surface atmospheric pressure is shown on synoptic charts as isobars

Isobars join areas of equal pressure – like contour lines join areas of equal height


Pressure systems1

Define that with heating, rises vertically, with poleward movement in the upper atmosphere. This forms a convection cell that dominates tropical and sub-tropical climates.Atmospheric Pressure Systems

Explain the characteristics of High Pressure Systems, include:

Alternative name

Description

Weather conditions (winter/summer/sky/pressure gradient)

Include diagram to show air movements in N & S hemisphere

Repeat for Low Pressure Systems

Pressure Systems


Utc stands for
UTC – Stands for…. that with heating, rises vertically, with poleward movement in the upper atmosphere. This forms a convection cell that dominates tropical and sub-tropical climates.