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Flashcards in Chapter 8 PPT Deck (25):
1

Convergence?

A net inflow of air molecules into a region of the atmosphere

2

Convergence within an air column is always associated with what?

Increasing surface pressure

3

What type of pressure system is a Cyclone?

Low pressure system

4

What is it that make Cyclones happen?

Imbalances between the PGF and the Coriolis Force

5

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

6

Divergence?

A net outflow of air molecules from a region of the atmosphere

7

Divergence within an air column is always associated with what?

Decreasing surface pressure

8

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

9

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

10

What force is responsible for throwing the guy off the merry-go-round?

Centrifugal Force

11

What is the speed of air flow through a trough?

Slow

12

What is the speed of air flow through a ridge?

Fast

13

What are the four movements of air, from trough to ridge?

-Air Speeds Up
-Divergence
-Rising Motion
-Decreasing Surface Pressure

14

What are the four movements of air, from ridge to trough?

- Air slows down
-Convergence
-Sinking Motion
-Increasing Surface Pressure

15

Jet streak?

Regions of exceptionally strong winds in the jetstream

16

Where do jet-streaks occur?

Where the isobars (or height contours) are very closely spaced.

17

In a jet streak, What are the three things that happen in the left entrance region?

-Convergence
-Sinking Motion
-Increasing Surface Pressure

18

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.

19

In a jet streak, what are the four things that happen in the right entrance region?

-Divergence
-Rising Motion
-Decreasing Surface
-Pressure

20

In a Jet streak, what are the four things that happen in the left exit region?

-Divergence
-Rising Motion
-Decreasing Surface
-Pressure

21

In a jet-streak, what are the four things that happen in the right exit region?

-Convergence
-Sinking Motion
-Increasing Surface Pressure

22

In the left entrance, is it convergence or divergence?

Convergence

23

In the Right entrance, is it convergence or divergence?

Divergence

24

In the left exit region, is it divergence or convergence?

Divergence

25

In the right exit region, is it divergence or convergence?

Convergence