The barometer is the atmospheric pressure measurement instruments.For measuring the pressure caused by the pressure of air, using liquid or solid materials that are exposed directly to the air. The trend is changing the pressure can be applied to predict weather changes in a short period of time the air pressure measured in several points. Taken internally processed surface weather analysis (surface weather analysis) to help find a Groove air pressure (surface troughs), high air pressure (high pressure systems), and air pressure as (frontal boundaries).
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