Scholarship at Penn Libraries

Document Type

Government Publication

Date of this Version

January 1999


This report assesses the effects of aircraft on climate and atmospheric ozone and is the first IPCC report for a specific industrial subsector. It was prepared by IPCC in collaboration with the Scientific Assessment Panel to the Montreal Protocol on Substances that Deplete the Ozone Layer, in response to a request by the International Civil Aviation Organization (ICAO) because of the potential impact of aviation emissions. These are the predominant anthropogenic emissions deposited directly into the upper troposphere and lower stratosphere.

Aviation has experienced rapid expansion as the world economy has grown. Passenger traffic (expressed as revenue passenger kilometers) has grown since 1960 at nearly 9% per year, 2.4 times the average Gross Domestic Product (GDP) growth rate. Freight traffic, approximately 80% of which is carried by passenger airplanes, has also grown over the same time period. The rate of growth of passenger traffic has slowed to about 5% in 1997 as the industry is maturing. Total aviation emissions have increased, because increased demand for air transport has outpaced the reductions in specific emissions from the continuing improvements in technology and operational procedures. Passenger traffic, assuming unconstrained demand, is projected to grow at rates in excess of GDP for the period assessed in this report.


This excerpt from the IPCC publication,Aviation and the Global Atmosphere, includes the summary for policymakers and Chapter 9 "Aircraft Emissions: Current Inventories and Future Scenarios."
The complete report is available on the web at
Wickrama, U.K., Henderson, S.C., Vedantham, A., et al. (1999) Chapter 9 Aircraft Emissions: Current Inventories and Future Scenarios. Aviation and the Global Atmosphere. Intergovernmental Panel on Climate Change.
Cambridge: Cambridge University Press


global warming, aircraft, emissions, chemistry



Date Posted: 12 May 2008

This document has been peer reviewed.