Chapter09a - Wind Small-Scale and Local Systems RECAP C...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Wind: Small-Scale and Local Systems
Background image of page 1

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

View Full Document Right Arrow Icon
RECAP Coriolis Force: 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. The force is proportional to the wind velocity: larger force on stronger winds and vice versa In the NH deflects the wind to the right. In the SH deflects the wind to the left.
Background image of page 2
RECAP Geostrophic winds the pressure force balanced by the Coriolis force. the wind is parallel to the isobars. westerly winds in both NH and SH Gradient winds pressure force not balanced by the Coriolis force. Cyclones ( L ), around centers of low pressure Counterclockwise in NH, clockwise in SH Anticyclones ( H ), around centers of high pressure Clockwise in NH, counterclockwise in SH Surface winds (today): Balance between the pressure gradient force, the Coriolis force and the air friction. The wind crosses the isobars. Vertical air motion (today): convergences and divergences.
Background image of page 3

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

View Full Document Right Arrow Icon
Surface Winds- a balance of three forces In the boundary layer (~1km thick) friction is important ! Friction is acting
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 23

Chapter09a - Wind Small-Scale and Local Systems RECAP C...

This preview shows document pages 1 - 5. Sign up to view the full document.

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