Feb13_09_AtmosCirculation2

Feb13_09_AtmosCirculation2 - Atmospheric Circulation...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
Atmospheric Circulation
Background image of page 1

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

View Full DocumentRight Arrow Icon
Formation of High Pressure and Low Pressure System Heating --- Rising air --- Low pressure Cooling --- Sinking air ---High Pressure (left) Ascending air cools as it expands. Cooler air can hold less water vapor (saturation water vapor pressure is lower), so water vapor condenses into tiny droplets - clouds. Descending air warms as it compresses the droplets (clouds) evaporate.
Background image of page 2
Heating and cooling at the surface of the Earth results in the formation of low and high pressure systems
Background image of page 3

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

View Full DocumentRight Arrow Icon
Convection in the non-rotating atmosphere (no Coriolis force)
Background image of page 4
Coriolis Effect creates Easterly and Westerly Winds. Each hemisphere has 3 convection cells. Global air circulation as described in the six-cell circulation model. Air rises at the equator and falls at the poles, but instead of one great circuit in each hemisphere from equator to pole, there are three in each hemisphere. Note the influence of the Coriolis effect on wind direction. The circulation show here is ideal that is, a long-term average of wind flow.
Background image of page 5

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

View Full DocumentRight Arrow Icon
atmospheric circulation cell . Three cells exist in each hemisphere. Hadley cells are tropical cells found on each side of the equator. Ferrel cells are found at the mid-latitudes. Polar cells are found near the poles. What are some of the wind patterns found between and within cells? Doldrums are calm equatorial areas where two Hadley cells converge Horse latitudes are areas between Hadley and Ferrel cells. Trade winds are surface winds of Hadley cells. Westerlies
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 40

Feb13_09_AtmosCirculation2 - Atmospheric Circulation...

This preview shows document pages 1 - 7. Sign up to view the full document.

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