Global Hazards 1 Flashcards
What is wind
Large scale movements of air caused by differences in pressure
Where does wind move to
From areas of high pressure to low pressure
What is the order of cells
Polar
Ferrel
Hadley
What weather does a polar and ferrel cell create
Low pressure ( a depression )
Where is the subtropical
30 degrees north and south of equatir
What weather does high pressure cause
Settled weather conditions
How does precipitation occur
When warm air and wet air rises and cools causing water vapour to condense
When is wind really strong
When the difference in pressure between areas is large
How do tropical strorms occur
-Sea temp has to be at least 26 degrees
-low pressure so warm air rises and condenses
-rising air creates low pressure area
-earths rotation causes storm to spin
What is a tropical storm
Intense low pressure weather systems with heavy rain and strong winds
Why is there heavy winds in a tropical storm
Due to the area pressure being so low in the storm
Why is there heavy precipitation in a tropical storm
Large amounts of warm air being sucked towards centre of storm due to difference in pressure
Where do most tropical storms occur
5 degrees and 30 degrees north and south of equator
When do most tropical storms occur
Late summer and beginning of autumn
What is Lá nina
Trade winds blow to the west from South America to Australasia
