What is it about?
The metric that is the basis of the new ICAO regulation of CO2 emission by aviation is fundamentally flawed. The paper shows how, with minimal change, the formula for the metric could transformed into one that is firmly rooted in flight physics. The paper sets out a full analysis of the flight physics involved and provides the basis for future regulation based on sound science if, at some future date, ICAO decides to extend the application of its CO2 regulation and decides to base the extension on sound science. ,
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Why is it important?
International regulation of aviation should be based on sound science. Only a few in the aviation community are aware that the metric for CO2 emission adopted by ICAO in 2013 and used in 2016 as the basis for setting CO2 limits for new aircraft is a compromise in which well understood science has been overridden. This aeronautical and environmental communities need to be aware of this fact.
Perspectives
The ICAO paper which sets out the metric provides an excellent basis for regulation of aviation CO2 emissions in all respects except for the introduction of an unjustifiable exponent for a key parameter. Elimination of this exponent in the formula defining the metric would make it satisfactory. To one who has been engaged in this field for fifteen years, it is exasperating that the Breguet range equation, which is well known, fundamentally sound and essentially inescapable, has been deliberately excluded from the formulation of the metric. The thrust of our paper is that it should have been the foundation of the metric.
Dr John E Green
Royal Aeronautical Society
Read the Original
This page is a summary of: CAEP/9-agreed certification requirement for the Aeroplane CO2 Emissions Standard: a comment on ICAO Cir 337, The Aeronautical Journal, April 2016, Cambridge University Press,
DOI: 10.1017/aer.2016.19.
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