Atmospheric Moisture and Pressure

Water Vapour and Atmospheric Stability: Influences buoyancy, affecting weather dynamics.

Evapotranspiration: Combination of evaporation from surfaces and plant transpiration; critical for the water cycle.

Temperature-Humidity Relationship: Warmer air holds more moisture, affecting saturation.

Ideal Gas Law: (PV=nRT) explains relationships among pressure, volume, and temperature in the atmosphere.

Lapse Rates: Temperature decreases with altitude; includes Dry Adiabatic Lapse Rate (10°C/km) and Saturated Adiabatic Lapse Rate (5°C/km).

Humidity Definitions: Measures water vapour in the air: Absolute, Specific, and Relative Humidity.

Dew Point Temperature: Temperature at which air becomes saturated, leading to condensation.

Water Vapour Pressure: Partial pressure of water vapour; increases with temperature, crucial for precipitation processes.

Key Takeaways: Water vapour interactions significantly impact weather and climate, while evapotranspiration is vital for precipitation dynamics.