jetcloud

Jet Aircraft Condensation Trails: Their Radiative Impacts and Association with Atmospheric Conditions.: "Jet condensation trails (contrails) are suspected to be an important contributor to the increase in high clouds that has been recognized since the middle of this century. Contrails can persist and spread in large groups, or 'outbreaks', when occurring in a unique range of atmospheric conditions. During these situations they can significantly modify the Earth-atmosphere radiation balance."