Chapter 6 part 2 Flashcards Preview

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Flashcards in Chapter 6 part 2 Deck (11)
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1

Anticyclone

surface winds spiralling out from a high-pressure area in a clockwise direction

2

cyclone

winds spiralling into a low pressure area in a counter-clockwise direction

3

ITCZ

Thermally caused low pressure area (equatorial low)

4

Jet stream

most prominent movement in upper level westerly wind flows. Irregular, concentrated, sinuous bands of geostrophic wind

5

Asian Monsoon Patterns

- moisture laden air is driven towards the low-pressure ITCZ line

6

Main types of local winds

Land and Sea Breezes

Mountain and Valley Breezes

Gravity Drainage Winds

7

Land and Sea Breezes

created by different heating characteristics of land/water surfaces

8

Mountain/Valley Breezes

Valley slopes: heat sooner during the day than floors

At night, heat is lost from the slopes and then subsides downslope where warmer, less dense air remains

9

Gravity Drainage Winds

- Katabatic winds, Mistral winds

- cold air from high eleveations flows downhill at a speed causing frost damage on the slope/valley below

- dry, warm downslope winds flow downhill, can cause sublimation

10

Gyre

Oceanic circulation systems

11

Ocean Currents are shaped by...

- Wind's frictional drag
- Coriolis force
- density differences
- Structural config. of continents/ocean flow
- astronomical forces causing tides