Meteorology · Pressure Systems
Surface winds around a low-pressure center (cyclone) in the Northern Hemisphere circulate:
- AClockwise and outward
- BCounterclockwise and inward✓ Correct
- CClockwise and inward
- DStraight along the isobars
Explanation
In the NH, air spirals counterclockwise and inward around a low (and clockwise and outward around a high) because the pressure-gradient force is deflected by the Coriolis effect and reduced by surface friction.
Authority: Bowditch (Pub. No. 9), atmospheric circulation
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