Stettler, ME and Boies, AM and Petzold, A and Barrett, S (2013) Global Civil Aviation Black Carbon Emissions. Environ Sci Technol.Full text not available from this repository.
Aircraft black carbon (BC) emissions contribute to climate forcing, but few estimates of BC emitted by aircraft at cruise exist. For the majority of aircraft engines the only BC-related measurement available is smoke number (SN) - a filter based optical method designed to measure near-ground plume visibility, not mass. While the First Order Approximation (FOA3) technique has been developed to estimate BC mass emissions normalized by fuel burn [EI(BC)] from SN, it is shown that it underestimates EI(BC) by >90% in 35% of directly measured cases (R2=-0.10). As there are no plans to measure BC emissions from all existing certified engines - which will be in service for several decades - it is necessary to estimate EI(BC) for existing aircraft on the ground and at cruise. An alternative method, called FOX that is independent of the SN is developed to estimate BC emissions. Estimates of EI(BC) at ground level are significantly improved (R2=0.68), while estimates at cruise are within 30% of measurements. Implementing this approach for global civil aviation estimated aircraft BC emissions are revised upwards by a factor of ~3. Direct radiative forcing (RF) due to aviation BC emissions is estimated to be 9.5 mW/m2, equivalent to ~1/3 of the current RF due to aviation CO2 emissions.
|Divisions:||Div A > Energy|
|Depositing User:||Cron Job|
|Date Deposited:||27 Jul 2013 17:10|
|Last Modified:||07 Oct 2013 01:13|
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