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The impact of traffic emissions on atmospheric ozone and OH: results from QUANTIFY

Hoor, Peter and Borken-Kleefeld, Jens and Caro, Dimitri and Dessens, Olivier and Endresen, O. and Gauss, Michael and Grewe, Volker and Hauglustaine, Didier and Isaksen, Ivar S.A. and Jöckel, Patrick and Lelieveld, Jos and Myhre, Gunnar and Meijer, Ernst and Olivie, Dirk and Prather, Michael and Schnadt Poberaj, Christina and Shine, Keith and Staehelin12, Johannes and Tang, Q. and van Aardenne, John and van Velthoven, Peter and Sausen, Robert (2009) The impact of traffic emissions on atmospheric ozone and OH: results from QUANTIFY. Atmospheric Chemistry and Physics, 9, pp. 3113-3136. Copernicus.

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Official URL: http://www.atmos-chem-phys.net/9/3113/2009/acp-9-3113-2009.pdf

Abstract

To estimate the impact of emissions by road, aircraft and ship traffic on ozone and OH in the present-day atmosphere six different atmospheric chemistry models have been used. Based on newly developed global emission inventories for road, ship and aircraft emission data sets each model performed sensitivity simulations reducing the emissions of each transport sector by 5%. The model results indicate that on global annual average lower tropospheric ozone responds most sensitive to ship emissions (50.6%�±10.9% of the total traffic induced perturbation), followed by road (36.7%�±9.3%) and aircraft exhausts (12.7%�±2.9%), respectively. In the northern upper troposphere between 200â��300 hPa at 30â��60�°N the maximum impact from road and ship are 93% and 73% of the maximum effect of aircraft, respectively. The latter is 0.185 ppbv for ozone (for the 5% case) or 3.69 ppbv when scaling to 100%. On the global average the impact of road even dominates in the UTLS-region. The sensitivity of ozone formation per NOx molecule emitted is highest for aircraft exhausts. The local maximum effect of the summed traffic emissions on the ozone column predicted by the models is 0.2 DU and occurs over the northern subtropical Atlantic extending to central Europe. Below 800 hPa both ozone and OH respond most sensitively to ship emissions in the marine lower troposphere over the Atlantic. Based on the 5% perturbation the effect on ozone can exceed 0.6% close to the marine surface (global zonal mean) which is 80% of the total traffic induced ozone perturbation. In the southern hemisphere ship emissions contribute relatively strongly to the total ozone perturbation by 60%â��80% throughout the year. Methane lifetime changes against OH are affected strongest by ship emissions up to 0.21 (�± 0.05)%, followed by road (0.08 (�±0.01)%) and air traffic (0.05 (�± 0.02)%). Based on the full scale ozone and methane perturbations positive radiative forcings were calculated for road emissions (7.3�±6.2 mWmâ��2) and for aviation (2.9�±2.3 mWmâ��2). Ship induced methane lifetime changes dominate over the ozone forcing and therefore lead to a net negative forcing (â��25.5�±13.2 mWmâ��2).

Document Type:Article
Title:The impact of traffic emissions on atmospheric ozone and OH: results from QUANTIFY
Authors:
AuthorsInstitution or Email of Authors
Hoor, Peterpeter.hoor@mpic.de
Borken-Kleefeld, JensUNSPECIFIED
Caro, DimitriUNSPECIFIED
Dessens, OlivierUNSPECIFIED
Endresen, O.UNSPECIFIED
Gauss, MichaelUNSPECIFIED
Grewe, Volkervolker.grewe@dlr.de
Hauglustaine, DidierUNSPECIFIED
Isaksen, Ivar S.A.UNSPECIFIED
Jöckel, PatrickUNSPECIFIED
Lelieveld, JosUNSPECIFIED
Myhre, GunnarUNSPECIFIED
Meijer, ErnstUNSPECIFIED
Olivie, DirkUNSPECIFIED
Prather, MichaelUNSPECIFIED
Schnadt Poberaj, ChristinaUNSPECIFIED
Shine, KeithUNSPECIFIED
Staehelin12, JohannesUNSPECIFIED
Tang, Q.UNSPECIFIED
van Aardenne, JohnUNSPECIFIED
van Velthoven, PeterUNSPECIFIED
Sausen, Robertrobert.sausen@dlr.de
Date:May 2009
Journal or Publication Title:Atmospheric Chemistry and Physics
Refereed publication:Yes
In Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:9
Page Range:pp. 3113-3136
Publisher:Copernicus
Status:Published
Keywords:Traffic Climate impact, ozone, air traffic
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Atmosphären- und Klimaforschung (old)
Location: Berlin-Adlershof , Oberpfaffenhofen
Institutes and Institutions:Verkehrsstudien
Institute of Atmospheric Physics > Atmospheric Dynamics
Deposited By: Dr.rer.nat. Volker Grewe
Deposited On:22 Jul 2009 15:09
Last Modified:12 Dec 2013 20:38

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