Long-lived contrails form predominantly not in cloud-free skies, but within already existing ice clouds. This is the conclusion reached by a team of scientists from Forschungszentrum Jülich, the ...

Contrails – short for condensation trails – are linear clouds made up of ice crystals that form behind jet aircraft at high altitudes. These artificial cirrus clouds are formed when hot and moist ...

Contrails in the blue sky remind us of daily air traffic—and its impact on the climate. However, the effect of contrails on the climate is still only partially understood. It is assumed that they have ...