How many CelsiusDegrees per 1,000 feet of altitude does the standard lapse rate specify?

How many CelsiusDegrees per 1,000 feet of altitude does the standard lapse rate specify?

• A. 1
• B. 3
• C. 2
• D. 4

Answer: (C)

The temperature in the standard atmosphere falls as you gain height, and the rate used in aviation is about 2 °C for every 1,000 ft of altitude. This means for every thousand feet you climb, the air temperature drops by roughly two degrees Celsius. It’s a handy rule of thumb for quick mental math when estimating ISA temperatures at altitude. While actual conditions can vary, 2 °C per 1,000 ft is the standard reference, so the correct rate is two degrees per thousand feet.

The temperature in the standard atmosphere falls as you gain height, and the rate used in aviation is about 2 °C for every 1,000 ft of altitude. This means for every thousand feet you climb, the air temperature drops by roughly two degrees Celsius. It’s a handy rule of thumb for quick mental math when estimating ISA temperatures at altitude. While actual conditions can vary, 2 °C per 1,000 ft is the standard reference, so the correct rate is two degrees per thousand feet.