QQ.1. How do atmospheric forces such as the pressure gradient, Coriolis effect, and friction collectively determine global and local wind patterns?
- Pressure Gradient Force (PGF) initiates wind by driving air from high to low pressure.
- Coriolis effect deflects moving air right in NH, left in SH due to Earth's rotation.
- Geostrophic wind forms at high altitudes when PGF balances Coriolis, blowing parallel to isobars.
- Friction near surface slows wind, reducing Coriolis, causing wind to cross isobars towards low pressure.
Answer: Wind is essentially air in motion, and its patterns, both global and local, are fundamentally shaped by the interplay of three primary atmospheric forces: the pressure gradient force, the Coriolis effect, and friction. These forces work in concert to establish the complex dynamics of atmospheric circulation. The **Pressure Gradient Force (PGF)** is the initial and primary driver of wind. Air naturally flows from areas of high atmospheric pressure to areas of low atmospheric pressure. The PGF a...