Chapter10a - The General Circulation of the Atmosphere...

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

View Full Document Right Arrow Icon
The General Circulation of the Atmosphere
Background image of page 1

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

View Full DocumentRight Arrow Icon
Upcoming Schedule Wednesday, March 5: begin Chapter 10. Friday, March 7: Questions and answers. Spring break: March 10-14. Monday, March 17: finish Chapter 10 +  office hours Wednesday, March 19:  Second midterm exam . The exam will cover Chapters 6, 7, 8, 9  and 10. Closed book No textbooks, calculators or cheatsheets. Alternate (anti-social) seating Bring a picture ID to the exam. Remember to: Write the 5-digit test code in lines 76-80 Write your name  on the exam sheet  and sign it Turn in both the exam sheet and the answer sheet. Friday, March 21: begin Chapter 11.
Background image of page 2
RECAP
Background image of page 3

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

View Full DocumentRight Arrow Icon
What we need to know for today Pressure gradient force: from  H igh to  L ow pressure Coriolis force (effect): Results from the rotation of the planet. Maximum at the poles and no effect at the equator. Acts perpendicular to the direction of motion: changes the direction of the wind  but not the wind magnitude. In the NH deflects the wind to the right. In the SH deflects the wind to the left. Winds aloft Balance between the pressure force and the Coriolis force. The wind is parallel to the isobars. Surface winds Balance between the pressure gradient force, the Coriolis force and the air  friction.  The wind crosses the isobars (from  H igh to  L ow pressure).
Background image of page 4
Surface Winds- a balance of three forces In the boundary layer (~1km thick)  friction is important Friction is acting  opposite  the direction of the velocity -> friction  reduces  the wind speed ->  the Coriolis force becomes  weaker  -> it  cannot balance  the pressure force. The wind starts to blow  across the isobars  towards the  low pressure The angle between the direction of the wind and the isobars is on average 30 deg (Buys- Ballot’s law).  It depends on the topography.
Background image of page 5

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

View Full DocumentRight Arrow Icon
Average Wind Structure The direction and the magnitude of the winds at a given location can  vary significantly during  the day, and from day to day. The general circulation (GC) refers to the average (the prevailing) winds 
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.

This note was uploaded on 04/08/2008 for the course MET 1010 taught by Professor Matchev during the Spring '08 term at University of Florida.

Page1 / 20

Chapter10a - The General Circulation of the Atmosphere...

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