Specific climate impact of passenger and freight transport
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2010
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NTL Classification:NTL-FREIGHT-FREIGHT;NTL-ENERGY AND ENVIRONMENT-ENERGY AND ENVIRONMENT;NTL-ENERGY AND ENVIRONMENT-Environment Impacts;NTL-ENERGY AND ENVIRONMENT-Transit Energy and Environment;NTL-RAIL TRANSPORTATION-RAIL TRANSPORTATION;NTL-RAIL TRANSPORTATION-Rail Energy and Environment;NTL-PUBLIC TRANSPORTATION-Transit Energy and Environment;
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Abstract:Emissions of short-lived species contribute significantly to
the climate impact of transportation. The magnitude of the effects
varies over time for each transport mode. This paper compares
first the absolute climate impacts of current passenger and
freight transportation. Second, the impacts are normalized with
the transport work performed and modes are compared.
Calculations are performed for the integrated radiative forcing
and mean temperature change, for different time horizons
and various measures of transport work. An unambiguous
ranking of the specific climate impact can be established for
freight transportation, with shipping and rail having lowest and
light trucks and air transport having highest specific impact
for all cases calculated. Passenger travel with rail, coach or twoand
three-wheelers has on average the lowest specific
climate impact also on short time horizons. Air travel has the
highest specific impact on short-term warming, while on longterm
warming car travel has an equal or higher impact per
passenger-kilometer.
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