Under subsaturated conditions, cirrus and contrails should dissipate.
M. Kübbeler, M. Hildebrandt, J. Meyer, C. Schiller, Th. Hamburger, T. Jurkat, A. Minikin,A. Petzold, M. Rautenhaus, H. Schlager, U. Schumann, C. Voigt, P. Spichtinger, J.-F.Gayet, C. Gourbeyre, M. Krämer 2011, 'Thin and subvisible cirrus and contrails in a subsaturated environment', Atmospheric Chemistry and Physicshttp://www.atmos-chem-phys.net/11/5853/2011/acp-11-5853-2011.pdf. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)