In which direction do depressions move across the UK? From north to south (southwards) From south to north (northwards) From west to east (eastwards) From east to west (westwards)
Answers
Explanation:
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answer Weather systems
On a weather chart, lines joining places with equal sea-level pressures are called isobars.
Charts showing isobars are useful because they identify features such as anticyclones
(areas of high pressure), depressions (areas of low pressure), troughs and ridges which are
associated with particular kinds of weather.
High pressure or anticyclone
In an anticyclone (also referred to as a 'high') the winds tend to be light and blow in a
clockwise direction. Also the air is descending, which inhibits the formation of cloud. The
light winds and clear skies can lead to overnight fog or frost. If an anticyclone persists over
northern Europe in winter, then much of the British Isles can be affected by very cold east
winds from Siberia. However, in summer an anticyclone in the vicinity of the British Isles
often brings fine, warm weather.
Low pressure or depression
In a depression (also referred to as a 'low'), air is rising. As it rises and cools, water vapour
condenses to form clouds and perhaps precipitation. Consequently, the weather in a
depression is often cloudy, wet and windy (with winds blowing in an anticlockwise direction
around the depression). There are usually frontal systems associated with depressions.