Atmospheric Temperature and Humidity Concepts

The video tutorial by Big Dave and Jackson Howell covers the concepts of absolute and relative humidity, explaining how they are measured and calculated. It provides examples to illustrate these calculations. The tutorial also delves into orographic uplift, describing how air is forced to rise over mountains, leading to precipitation. The concepts of dry and wet adiabatic lapse rates are explained, with an example problem demonstrating these principles in action.

What is the main topic of the lecture introduced by Big Dave?

• Weather Forecasting

• Relative Humidity and Orographic Uplift

• Orographic Uplift

• Absolute Humidity

How is absolute humidity defined?

• The temperature at which air becomes saturated

• The amount of water vapor in the air measured in grams per cubic meter

• The difference between dry and wet air

• The ratio of water vapor in the air to the maximum it can hold

What is the relative humidity if the absolute humidity is 30 grams per cubic meter and the maximum is 50 grams per cubic meter?

• 50%

• 60%

• 70%

• 80%

What happens to air when it hits a mountain range?

• It descends and warms up

• It rises and cools down

• It stays at the same altitude

• It evaporates completely

Which type of uplift occurs when surface air is heated and rises?

• Frontal Uplift

• Cyclonic Uplift

• Conventional Uplift

• Orographic Uplift

What is the dry adiabatic lapse rate?

• 4.5 degrees Fahrenheit per 1,000 feet

• 3.2 degrees Fahrenheit per 1,000 feet

• 5.5 degrees Fahrenheit per 1,000 feet

• 6.5 degrees Fahrenheit per 1,000 feet

At what rate does air cool when it begins to condense?

• 6.2 degrees Fahrenheit per 1,000 feet

• 4.2 degrees Fahrenheit per 1,000 feet

• 3.2 degrees Fahrenheit per 1,000 feet

• 5.5 degrees Fahrenheit per 1,000 feet

If an air parcel starts at 68°F at sea level, what is its temperature at 5,000 feet after rising?

• 42.5°F

• 50.5°F

• 70.5°F

• 60.5°F

What is the temperature at the top of the mountain if the air cools at the wet adiabatic lapse rate from 5,000 to 11,000 feet?

• 51.3°F

• 41.3°F

• 31.3°F

• 21.3°F

What is the final temperature on the leeward side at 4,000 feet after descending?

• 59.8°F

• 79.8°F

• 49.8°F

• 69.8°F