Seems the research indicates CIC . . . Contrail Induced Cloudiness increases global warming . . . .

[link to spie.org]


Content from external source:

Global radiative forcing from contrail-induced cloudiness


Ulrike Burkhardt and Bernd Kärcher

Climate model simulations, evaluated using remote sensing data, estimate the net radiative imbalance of the atmosphere due to aircraft condensation trails and their effects.

3 November 2011, SPIE Newsroom. DOI: 10.1117/2.1201110.003764

:Radiative Forcin:


Figure 1. Radiative forcing in the year 2002 from contrail-induced cloudiness (CIC), comprising the direct warming effect of contrail cirrus and the response of natural cirrus clouds introducing a cooling.2 For comparison, the radiative forcing from accumulated aviation carbon dioxide (CO2) emissions and the net forcing from other aircraft exhaust species (comprising the effect of nitrogen oxide emissions on ozone and methane as well as direct radiative effects from emissions of water vapor and soot particles) are shown for 2005 conditions.1