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ICAO Presentation on Intentional Geoengineering with Contrail Cirrus

March 4, 2010

Last Updated: September 24, 2021
Geoengineering

Ulrich Schumann addresses the ICAO Colloquium on Aviation and Climate Change regarding mitigation options for aviation pollution and contrail cirrus creation.

“Contrail cirrus contributes a large fraction to the aviation induced climate impact (comparable to 50 years of aviation C02)

Satellite data analyses suggest observable impact of aviation on cirrus cover and radiation fluxes.

The climate impact of aviation induced contrail cirrus depends on aircraft properties (e.g. soot emissions) and routing (avoid cirrus forming regions) [known as Ice-Supersaturated Regions or ISSR]

Both aspect offer the potential for aviation to reduce the climate impact of aviation (less soot emissions, less warming and more cooling contrails; predictable for operational planning)” [1]

References

1.1. Schumann, Ulrich. "Recent research results on the climate impact of contrail cirrus and mitigation options." ICAO Colloquium on Aviation and Climate Change, United Nations (2010).
https://www.icao.int/Meetings/EnvironmentalColloquium/Documents/2010-Colloquium/1_Schumann_ContrailMitigation.pdf • [AUDIO] https://www.icao.int/_layouts/download.aspx?SourceUrl=/Meetings/EnvironmentalColloquium/Documents/2010-Colloquium/2010-Audio/1_UlrichSchumann_18.mp3

2.2. Schumann, Ulrich. "Climate optimized routing of flights." ICAO Colloquium on Aviation and Climate Change, United Nations (2010).
https://www.icao.int/Meetings/EnvironmentalColloquium/Documents/2010-Colloquium/6_Schumann_Wmo.pdf • [AUDIO] https://www.icao.int/_layouts/download.aspx?SourceUrl=/Meetings/EnvironmentalColloquium/Documents/2010-Colloquium/2010-Audio/6_UlrichSchumann_31.mp3

3.3. "ICAO Colloquium on Aviation and Climate Change." International Civil Aviation Organization, United Nations (2010).
https://www.icao.int/Meetings/EnvironmentalColloquium/Pages/2010-Documentation.aspx

4.4. "GROUNDED: How ICAO failed to tackle aviation and climate change and what should happen now." International Civil Aviation Organization Triennial Assembly, United Nations (2010).
http://web.archive.org/web/20140802165000/https://www.transportenvironment.org/sites/te/files/media/2010_09_icao_grounded.pdf

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