A study of jet contrails following the grounding of commercial flights after the September 11, 2001 terrorist attacks found that
A) contrails have a very limited effect on the Earth's energy budget.
B) contrails reduce diurnal temperature ranges in regions with a high density aircraft.
C) contrails contribute more to cloud-albedo forcing than cloud-greenhouse forcing.
D) contrails are difficult to distinguish from natural cirrus clouds.

Question

Quizplus · Accepted Answer

The study found that contrails reduce diurnal temperature ranges in regions with a high density of aircraft.

A Study of Jet Contrails Following the Grounding of Commercial