Orographic Lifting and Atmospheric Concepts

The video tutorial explains orographic lifting, a process where air is forced to rise over a mountain, leading to cooling and cloud formation. It covers the ascent of air, pressure and temperature changes, and the formation of clouds at the LCL. The video also distinguishes between the windward and leeward sides of a mountain, highlighting the differences in vegetation and climate due to these processes.

What is the primary reason air is forced to rise in orographic lifting?

• The air is saturated with moisture.

• The air is cooler than the surrounding environment.

• The air is heated by the sun.

• A physical barrier like a mountain obstructs the airflow.

As air ascends over a mountain, what happens to its pressure?

• It fluctuates randomly.

• It increases.

• It remains constant.

• It decreases.

What is the dry adiabatic lapse rate?

• 15 degrees C per thousand meters

• 20 degrees C per thousand meters

• 10 degrees C per thousand meters

• 5 degrees C per thousand meters

What occurs at the Lifted Condensation Level (LCL)?

• The air becomes unsaturated.

• The air temperature rises.

• The air pressure increases.

• Saturation and cloud base formation occur.

When condensation occurs, what is released into the atmosphere?

• Cold air

• Moisture

• Heat energy

• Carbon dioxide

What is the moist adiabatic lapse rate used in the video?

• 10 degrees C per thousand meters

• 5 degrees C per thousand meters

• 3 degrees C per thousand meters

• 7 degrees C per thousand meters

Which side of the mountain is typically greener due to precipitation?

• Leeward side

• Windward side

• Neither side

• Both sides equally

What happens to the air as it descends on the leeward side of a mountain?

• It cools and expands.

• It compresses and warms.

• It remains unchanged.

• It becomes saturated.

Why is the leeward side of a mountain often barren?

• It is at a higher altitude.

• It experiences compressional warming and less precipitation.

• It receives more sunlight.

• It is closer to the ocean.

What is the effect of increasing temperature on the saturation mixing ratio?

• It increases.

• It decreases.

• It remains constant.

• It becomes zero.