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Ship emitted NO2 in the Indian Ocean: comparison of model results with satellite data

Franke, Klaus and Richter, Andreas and Bovensmann, Heinrich and Eyring, Veronika and Jöckel, Patrick and Hoor, Peter and Burrows, John P. (2009) Ship emitted NO2 in the Indian Ocean: comparison of model results with satellite data. Atmospheric Chemistry and Physics, 9, pp. 7289-7301.

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Official URL: http://www.atmos-chem-phys.net/9/7289/2009/acp-9-7289-2009.html

Abstract

The inventory of NOx emission from international shipping has been evaluated by comparing NO2 tropospheric columns derived from the satellite instruments SCIAMACHY (January 2003 to February 2008), GOME (January 1996 to June 2003), and GOME-2 (March 2007 to February 2008) to NO2 columns calculated with the atmospheric chemistry general circulation model ECHAM5/MESSy1 (January 2000 to October 2005). For both measurements and model consistently the tropospheric excess method was used to obtain mean NO2 columns over the shipping lane from India to Indonesia, and over two ship free regions, the Bay of Bengal and the central Indian Ocean. The long-term data set from SCIAMACHY yields the first monthly analysis of ship induced NO2 enhancements in the Indian Ocean. Comparison of data from the three instruments and in addition OMI reveals differences between the datasets which are discussed with respect to the diurnal cycle of NO2 and the increase in shipping traffic over the time period studied. In general, the model simulates the differences between the regions affected by ship pollution and ship free regions reasonably well. Minor discrepancies between model results and satellite data were identified during biomass burning seasons in March to May over India and the Indochinese Peninsula and August to October over Indonesia. We conclude that the NOx ship emission inventory used in this study is a good approximation of NOx ship emissions in the Indian Ocean for the years 2002 to 2007. It assumes that around 6 Tg(N) yr−1 are emitted by international shipping globally, resulting in 90 Gg(N) yr−1 in the region of interest when using Automated Mutual Assistance Vessel Rescue System (AMVER) as spatial proxy. A second model run using lower ship emissions estimates of 3–4 Tg(N) yr−1 globally results in poorer agreement with the satellite data.

Document Type:Article
Title:Ship emitted NO2 in the Indian Ocean: comparison of model results with satellite data
Authors:
AuthorsInstitution or Email of Authors
Franke, KlausUniv. of Bremen
Richter, AndreasUniv. of Bremen
Bovensmann, HeinrichUniv. of Bremen
Eyring, VeronikaUNSPECIFIED
Jöckel, PatrickMPI für Chemie, Mainz
Hoor, PeterMPI f. Chemie, Mainz
Burrows, John P.Univ. of Bremen
Date: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. 7289-7301
Status:Published
Keywords:Transport, Oceangoing shipping, Ozone, NOx
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Transport System
DLR - Research area:Transport
DLR - Program:V VS - Verkehrssystem
DLR - Research theme (Project):V - Umweltwirkungen des Verkehrs (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Dynamics
Deposited By: PD Dr. habil. Veronika Eyring
Deposited On:03 Dec 2009 16:40
Last Modified:26 Mar 2013 13:12

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