Barometer needle (red) pointing between fair and very dry weather. It is reading an atmospheric pressure of almost 31 inches of mercury (1040 millibar

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Barometer needle (red) pointing between fair and very dry weather. It is reading an atmospheric pressure of almost 31 inches of mercury (1040 millibars). The average atmospheric pressure at sea level is 1013 millibars. The black needle cannot move by itself. It may be manually adjusted to match the current pressure, allowing the direction of future pressure changes to be followed. As well as bringing dry weather, high pressure systems are associated with settled atmospheric conditions with little wind.

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Size: 4153px × 3406px
Photo credit: © SHEILA TERRY/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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