Meteorology · Pressure Systems — Ridge/Trough
A 'ridge' on a surface weather chart is:
- AAn elongated extension of high pressure, usually bringing fair weather✓ Correct
- BAn elongated area of low pressure
- CA front
- DA line of thunderstorms
Explanation
A ridge is an elongated area of relatively high pressure, generally associated with settled, fair weather. A trough is an elongated area of low pressure, often associated with clouds, wind shifts, and precipitation.
Authority: Bowditch (Pub. No. 9), pressure patterns
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