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Flashcards in Synoptic weather charts Deck (14)
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The circular lines are called (1) and they join areas of the same (2)

1 - isobars
2 - air pressure


What can we learn from the pressure pattern?

Where the wind is coming from and how strong it is as well as areas of high and low pressure


If the difference between areas of high and low pressure is greater, the air will move (1) this is shown by isobars being (2) and so wind speed will be (3)

1 - faster
2 - closer together
3 - high


Why is there little precipitation in areas of high pressure?

Evaporated water can't rise


In the Northern Hemisphere, air moves around high pressure in (1) direction and low pressure in (2) direction so isobars tell us wind (3)

1 - a clockwise
2 - an anti-clockwise
3 - speed and direction


What is used to represent a warm front?

A red line and red semi-circles


What is used to represent a cold front?

A blue line and blue triangles


What does the way in which semi-circles or triangles are facing represent?

The direction in which the front is moving


What does the position of a front depend on?

- Change in wind direction/ temperature


What tends to be increased along a front itself?

Cloud and rainfall


What is an 'occluded front'

Cold fronts tend to move faster than warm fronts but sometimes they catch up with each other


How is an occluded front represented?

A purple line with a purple semi-circle and triangle next to each other


What is a 'warm sector'? What weather is usually associated with it?

Air trapped between a warm and cold front
Low cloud and patchy light rain


What does a red or blue line broken with crosses represent?

Weakening front
Difference in the warmth or dryness of air becoming less marked