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Weather Alphabet |
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weather alphabet from Anemometer to Zephyr |
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If
you want to know the time, ask a policeman. If you want to know about
weather, Paul Mooney and Trai Anfield are the folk to ask... so we
did.
The
result is a complete A to Z of weather-related stuff!
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I
is for....
Ice
Day
This is defined as a period of 24 hours, normally beginning at 0900GMT,
when the maximum temperature is less than 0 Celsius (32 degrees
Fahrenheit). This is a very rare occurrence in the north of England.
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| Autumn
tints |
Indian
Summer
This is the name used to describe any (very welcome) spell of warm,
calm weather which occurs during the autumn, especially October
and November.
The term is thought to originate in North America around the end
of the 18th century, and was introduced to Britain at the start
of the nineteenth century.
Inversion
A temperature inversion occurs when air temperature increases with
height. It is called an inversion because it is the reverse of normal
atmospheric conditions, when temperature would decrease with height.
Inversion layers often associated with high pressure areas.
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| Isobars
sit over a chart of the British Isles |
Isobar
This is a line of constant atmospheric pressure drawn on a weather
chart.
These lines, normally drawn at 2 or 4 millibar intervals, allow
meteorologists to identify important features such as anticyclones
and depressions.
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