And why is a rapid DROP in them bad?
In: Planetary Science
Millibars are simply a metric unit of pressure, the atmosphere normally sits at one bar.
When a cyclonic storm forms you get low pressure in the centre and this causes air to move inwards. Due to the rotation of the planet, it causes this air to rotate as it heads inwards. The lower the pressure in the centre, The faster it will draw in air and the faster the air will spiral inwards.
This low pressure also lifts the ocean up, like someone sucking on a straw and can cause tidal surges.
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