Chapter 8 PPT Flashcards
Convergence?
A net inflow of air molecules into a region of the atmosphere
Convergence within an air column is always associated with what?
Increasing surface pressure
What type of pressure system is a Cyclone?
Low pressure system
What is it that make Cyclones happen?
Imbalances between the PGF and the Coriolis Force
What levels do imbalances between the PGF and the Coriolis force, that create a cyclone, where is it located in the atmosphere?
Level of the jet stream
Divergence?
A net outflow of air molecules from a region of the atmosphere
Divergence within an air column is always associated with what?
Decreasing surface pressure
What are the three things that happens to an air parcel as it rises in the atmosphere?
- Temperature decreases
- Saturation vapor pressure decreases
- Relative Humidity increases
What are the three things that happens to an air parcel as it depends in the atmosphere?
- Temperature increases
- Saturation Vapor Pressure increases
- Relative Humidity decreases
What force is responsible for throwing the guy off the merry-go-round?
Centrifugal Force
What is the speed of air flow through a trough?
Slow
What is the speed of air flow through a ridge?
Fast
What are the four movements of air, from trough to ridge?
- Air Speeds Up
- Divergence
- Rising Motion
- Decreasing Surface Pressure
What are the four movements of air, from ridge to trough?
- Air slows down
- Convergence
- Sinking Motion
- Increasing Surface Pressure
Jet streak?
Regions of exceptionally strong winds in the jetstream
Where do jet-streaks occur?
Where the isobars (or height contours) are very closely spaced.
In a jet streak, What are the three things that happen in the left entrance region?
- Convergence
- Sinking Motion
- Increasing Surface Pressure
On a jet streak, where are the entrance and exit regions?
The entrance region is on the left, and the exit region, is on the right.
In a jet streak, what are the four things that happen in the right entrance region?
- Divergence
- Rising Motion
- Decreasing Surface
- Pressure
In a Jet streak, what are the four things that happen in the left exit region?
- Divergence
- Rising Motion
- Decreasing Surface
- Pressure
In a jet-streak, what are the four things that happen in the right exit region?
- Convergence
- Sinking Motion
- Increasing Surface Pressure
In the left entrance, is it convergence or divergence?
Convergence
In the Right entrance, is it convergence or divergence?
Divergence
In the left exit region, is it divergence or convergence?
Divergence
In the right exit region, is it divergence or convergence?
Convergence
