Highlights CO2 emissions of air traffic are estimated at airport, airspace and flight levels. CO2 emission efficiencies in Greece and South China are compared. Hub airports have low CO2 emission efficiencies at airport and airspace levels. At flight level, hubbing is associated with higher CO2 emission efficiency.
Abstract Hubbing is an important operational practice in air transport. Many studies have been conducted to examine the benefits and impacts of hubbing from an economic perspective. However, its impact on CO2 emissions, especially across different air spaces, is not well understood. This paper explores the impact of hubbing activities in air transport from an environmental perspective. With a detailed methodology and data from the Greek and Hong Kong/Sanya flight information regions (FIRs), three levels of CO2 emissions are estimated: airport-based, airspace-based and flight-based. After contrasting the CO2 emission efficiencies of Athens International Airport (AIA) and the Hong Kong International Airport (HKIA), aircraft type and flight distance are examined to explain their emission efficiency differences. It is found that HKIA is associated with poorer CO2 emission efficiency at the airport and airspace levels because of the larger aircraft and longer flight distance. However, when CO2 emission efficiency at the flight level is considered, HKIA, with a higher passenger load factor, performs better. Major international hub airports should implement additional environmental measures to minimize the impact of hubbing activities on CO2 emissions at the airport and airspace levels.
CO2 emissions associated with hubbing activities in air transport: an international comparison
Journal of Transport Geography ; 34 ; 185-193
2013-01-01
9 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
CO2 emissions associated with hubbing activities in air transport: an international comparison
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