Which factor primarily drives the global wind pattern by deflecting air to the right in the Northern Hemisphere?

• A. Coriolis Effect
• B. Thermal Gradient
• C. Buoyancy
• D. Friction

Answer: (A)

The Coriolis effect is what bends the path of moving air because the Earth is rotating. In the Northern Hemisphere, this deflection is to the right, so air flowing from high-pressure areas toward low-pressure areas doesn’t move straight north–south or east–west; it curves. That bending organizes the global wind belts into recognizable patterns like the trade winds near the equator and the westerlies at mid-latitudes. The driving force behind the winds—the heat from the Sun creating pressure differences—is the thermal gradient, but the rightward deflection in the Northern Hemisphere sets the directional shape of those winds. Friction can slow winds near the surface and slightly modify their path, but the characteristic rightward deflection is the signature of the Coriolis effect.