What is the average temperature lapse rate?

The average temperature lapse rate refers to the rate at which air temperature decreases with an increase in altitude in the troposphere, which is the lowest layer of Earth’s atmosphere where most weather occurs. The standard average lapse rate is approximately 2°C for every 1,000 feet of elevation gain. This means that for each 1,000 feet you ascend in the atmosphere, the temperature typically drops about 2 degrees Celsius.

This value is derived from average atmospheric conditions and serves as a general guideline, acknowledging that actual lapse rates can vary due to factors such as humidity, geographic location, and weather systems. Understanding the average lapse rate is essential for meteorologists and those studying weather patterns, as it helps to predict how temperature will change with elevation, which is crucial for various applications, including aviation and agriculture. The other choices provide rates that are either too steep or too shallow compared to the established average, which is why the correct answer is 2°C for every 1,000 feet.