Eyring, Veronika (2008) Updated Study on Greenhouse Gas Emissions from Ships: Climate Impacts. MEPC 58, 5-9 October 2008, London, (UK).
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Increases in well-mixed greenhouse-gases such as carbon dioxide lead to positive radiative forcing (RF) and to global warming. CO2 remains in the atmosphere for a long time and will continue to have a warming effect long after its emission. Therefore, emissions data from ships starting as early as 1870 has been used when calculating the RF of shipping CO2 emissions. Since the historic data does not distinguish between international and domestic shipping, RF calculations are based on total shipping emissions rather than international shipping only. In order to calculate the RF from shipping we use a linear climate response model to calculate the contribution of CO2 emissions to marginal CO2 concentrations and the consequential radiative forcing. This model takes emission rates, calculates the resultant atmospheric concentrations of CO2 and then the RF which arises from changes in CO2 concentration. The RF from shipping CO2 for 2005 was calculated to be 46 mW m-2, contributing approximately 2.8% to the total anthropogenic CO2 RF. For comparison, aviation has a similar – if slightly smaller – present day annual emission rate (733 Tg CO2, 2005) but the RF is only 28 mW m-2. The somewhat larger forcing from shipping in this comparison may be easily explained by both the residence time of CO2 in the atmosphere and the time period of the activity.
|Document Type:||Conference or Workshop Item (Speech)|
|Title:||Updated Study on Greenhouse Gas Emissions from Ships: Climate Impacts|
|Date:||5 October 2008|
|In ISI Web of Science:||No|
|Keywords:||international shipping, transport, radiative forcing, climate change|
|Event Title:||MEPC 58|
|Event Location:||London, (UK)|
|Event Type:||international Conference|
|Event Dates:||5-9 October 2008|
|Organizer:||International Maritime Organization (IMO)|
|HGF - Research field:||Aeronautics, Space and Transport (old)|
|HGF - Program:||Transport|
|HGF - Program Themes:||Transport System|
|DLR - Research area:||Transport|
|DLR - Program:||V VS - Verkehrssystem|
|DLR - Research theme (Project):||V - Next Generation Train (old)|
|Institutes and Institutions:||Institute of Atmospheric Physics > Atmospheric Dynamics|
|Deposited By:||PD Dr. habil. Veronika Eyring|
|Deposited On:||16 Dec 2008|
|Last Modified:||27 Apr 2009 15:36|
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