mechanism of precipitation

conditions of precipitation, their types and mechanism of orographic precipitation

1. Necessary Conditions Mechanism of Precipitation

2. Convectional Lifting : H eating of earth’s surface causes air to rise rapidly M aritime air masses cross onto land, experience surface heating C reate low pressure as the air rises, air cools M oisture condenses into clouds and precipitation. Mechanism of Precipitation Air Lifting Mechanism 2. Frontal Wedging: When two contrasting temperatures are there, air masses and densities collides Precipitation occur at the surface of contact. Warm air rises above cold air

3. 3. Orographic Mechanism 4 . Convergence I t occurs when mountains act as a barrier to air flow Adiabatic cooling generate clouds and precipitation occurs at windward side Many of wettest places are located on windward mountain slopes. It occurs by collision of contrasting large air mass which forces air to rise vertically. Uplifting of these wind coming from different direction result in cloud formation.

4. Mechanism of Precipitation Orographic and Rain Shadow Mechanism Windward Mountain Slope Leeward Mountain Slope Wet areas are mostly present on windward side Air becomes warmer, dry and humidity rate drop High temperature on leeward is result of latent heat release during condensation at top of mountain.