What can we learn about ship emission inventories from measurements of air pollutants over the Mediterranean Sea

Abstract. Ship emission estimates diverge widely for all chemical compounds for several reasons: use of different methodologies (bottom-up or top-down), activity data and emission factors can easily result in a difference ranging from a factor of 1.5 to even an order of magnitude. Combining three sets of observational data – ozone and black carbon measurements sampled at three coastal sites and on board of a Mediterranean cruise ship, as well as satellite observations of atmospheric NO2 column concentration over the same area – we assess the accuracy of the three most commonly used ship emission inventories, EDGAR FT (Olivier et al., 2005), emissions described by Eyring et al. (2005) and emissions reported by EMEP (Vestreng et al., 2007). Our tool is a global atmospheric chemistry transport model which simulates the chemical state of the Mediterranean atmosphere applying different ship emission inventories. The simulated contributions of ships to air pollutant levels in the Mediterranean atmosphere are significant but strongly depend on the inventory applied. Close to the major shipping routes relative contributions vary from 10 to 50% for black carbon and from 2 to 12% for ozone in the surface layer, as well as from 5 to 20% for nitrogen dioxide atmospheric column burden. The relative contributions are still significant over the North African coast, but less so over the South European coast because densely populated regions with significant human activity contribute relatively more to air pollution than ships, even if these regions attract a lot of ship traffic. The observations poorly constrain the ship emission inventories in the Eastern Mediterranean where the influence of uncertain land based emissions, the model transport and wet deposition are at least as important as the signal from ships. In the Western Mediterranean, the regional EMEP emission inventory gives the best match with most measurements, followed by Eyring for NO2 and ozone and by EDGAR for black carbon. Given the uncertainty of the measurements and the model, each of the three emission inventories could actually be right, implying that large uncertainties in ship emissions need to be considered for future scenario analysis.

[1]  Thomas W. Kirchstetter,et al.  Emissions of trace gases and particles from two ships in the southern Atlantic Ocean , 2003 .

[2]  Axel Lauer,et al.  Satellite measurements of NO2 from international shipping emissions , 2004 .

[3]  E. Vignati,et al.  Ozone over the Western Mediterranean Sea – results from two years of shipborne measurements , 2010 .

[4]  J. Corbett,et al.  Particulate emissions from commercial shipping: Chemical, physical, and optical properties , 2008 .

[5]  Axel Lauer,et al.  Emissions from international shipping: 1. The last 50 years , 2005 .

[6]  Jeremy Firestone,et al.  Improving spatial representation of global ship emissions inventories. , 2008, Environmental science & technology.

[7]  Axel Lauer,et al.  © Author(s) 2006. This work is licensed under a Creative Commons License. Atmospheric Chemistry and Physics Analysis and quantification of the diversities of aerosol life cycles , 2022 .

[8]  H. Levy,et al.  Empirical model of global soil‐biogenic NOχ emissions , 1995 .

[9]  Philippe Thunis,et al.  Evaluation of long-term ozone simulations from seven regional air quality models and their ensemble , 2007 .

[10]  D. Hauglustaine,et al.  Multi-model simulations of the impact of international shipping on Atmospheric Chemistry and Climate in 2000 and 2030 , 2006 .

[11]  H. Bovensmann,et al.  Ship emitted NO 2 in the Indian Ocean: comparison of model results with satellite data , 2008 .

[12]  J. Lelieveld,et al.  What controls tropospheric ozone , 2000 .

[13]  P. Thunis,et al.  The sensitivity of aerosol in Europe to two different emission inventories and temporal distribution of emissions , 2006 .

[14]  D. Streets,et al.  A technology‐based global inventory of black and organic carbon emissions from combustion , 2004 .

[15]  U. Lohmann,et al.  Global model simulations of the impact of ocean-going ships on aerosols, clouds, and the radiation budget , 2007 .

[16]  W. Nordhaus.  The "Stern Review" on the Economics of Climate Change , 2006 .

[17]  M. Chin,et al.  Sources and distributions of dust aerosols simulated with the GOCART model , 2001 .

[18]  C. Deniz,et al.  Estimating shipping emissions in the region of the Sea of Marmara, Turkey. , 2008, The Science of the total environment.

[19]  A. Hansen,et al.  Absorption coefficients by aerosols in remote areas: a new approach to decouple dust and black carbon absorption coefficients using seven-wavelength Aethalometer data , 2005 .

[20]  J. Kučera,et al.  Using SEVIRI geostationary imagery for active fires analysis and burned biomass estimation: A case study in a Mediterranean ecosystem , 2006 .

[21]  Jeremy Firestone,et al.  Modeling energy use and emissions from North American shipping: application of the ship traffic, energy, and environment model. , 2007, Environmental science & technology.

[22]  K. F. Boersma,et al.  Near-real time retrieval of tropospheric NO 2 from OMI , 2006 .

[23]  Petr Chylek,et al.  Canadian Aerosol Module: A size‐segregated simulation of atmospheric aerosol processes for climate and air quality models 1. Module development , 2003 .

[24]  J. Corbett,et al.  Do emissions from ships have a significant impact on concentrations of nitrogen oxides in the marine boundary layer? , 2000 .

[25]  P Ekins,et al.  Evidence to Treasury Select Committee ‘Inquiry into Climate change and the Stern review: the implications for HM Treasury policy on tax and the environment’ , 2007 .

[26]  Gjermund Gravir,et al.  Emission from international sea transportation and environmental impact , 2003 .

[27]  Kostas Tsigaridis,et al.  Temporal variations of surface regional background ozone over Crete Island in the southeast Mediterranean , 2000 .

[28]  Erin H. Green,et al.  Mortality from ship emissions: a global assessment. , 2007, Environmental science & technology.

[29]  Peter Bergamaschi,et al.  European Geosciences Union Atmospheric Chemistry and Physics , 2005 .

[30]  Louisa Emmons,et al.  Ozone pollution from future ship traffic in the Arctic northern passages , 2006 .

[31]  Hans-F. Graf,et al.  The annual volcanic gas input into the atmosphere, in particular into the stratosphere: a global data set for the past 100 years , 2002 .

[32]  O. Krüger,et al.  Impact of ship emissions on cloud properties over coastal areas , 2006 .

[33]  J. Christensen,et al.  Test of two numerical schemes for use in atmospheric transport-chemistry models , 1993 .

[34]  Michael Q. Wang,et al.  An inventory of gaseous and primary aerosol emissions in Asia in the year 2000 , 2003 .

[35]  M. C. Dodge,et al.  A photochemical kinetics mechanism for urban and regional scale computer modeling , 1989 .

[36]  J. Randerson,et al.  Continental-Scale Partitioning of Fire Emissions During the 1997 to 2001 El Niño/La Niña Period , 2003, Science.

[37]  Mian Chin,et al.  Long-term simulation of global dust distribution with the GOCART model: correlation with North Atlantic Oscillation , 2004, Environ. Model. Softw..

[38]  A. R. Ravishankara,et al.  Light absorbing carbon emissions from commercial shipping , 2008 .

[39]  B. Langmann,et al.  Impact of ship emissions on the Mediterranean summertime pollution and climate: A regional model study , 2005 .

[40]  Markus Amann,et al.  Analysis of Policy Measures to Reduce Ship Emissions in the Context of the Revision of the National Emissions Ceilings Directive , 2007 .

[41]  J. Lelieveld,et al.  Global Air Pollution Crossroads over the Mediterranean , 2002, Science.

[42]  Paul J. Crutzen,et al.  Influence of NOx emissions from ships on tropospheric photochemistry and climate , 1999, Nature.

[43]  Zbigniew Klimont,et al.  Uncertainty analysis of emission estimates in the RAINS integrated assessment model , 2005 .

[44]  Gjermund Gravir,et al.  Update on emissions and environmental impacts from the international fleet of ships: the contribution from major ship types and ports , 2008 .

[45]  R. Andres,et al.  A time‐averaged inventory of subaerial volcanic sulfur emissions , 1998 .

[46]  J. Lamarque,et al.  Multimodel ensemble simulations of present-day and near-future tropospheric ozone , 2006 .

[47]  Sergey Kakareka,et al.  Inventory Review 2007. Stage 1 and 2 review. Emission data reported to LRTAP Convention and NEC Directive, review of gridded data and review of PM inventories in Belarus, Republic of Moldova, Russian Federation and Ukraine , 2007 .

[48]  P. Hopke,et al.  The comparison between thermal-optical transmittance elemental carbon and Aethalometer black carbon measured at multiple monitoring sites , 2004 .

[49]  Tami C. Bond,et al.  Emissions of primary aerosol and precursor gases in the years 2000 and 1750 prescribed data-sets for AeroCom , 2006 .

[50]  Bas Eickhout,et al.  The land-use projections and resulting emissions in the IPCC SRES scenarios scenarios as simulated by the IMAGE 2.2 model , 2004 .

[51]  Sander Houweling,et al.  The impact of nonmethane hydrocarbon compounds on tropospheric photochemistry , 1998 .

[52]  J. Lelieveld,et al.  Dry deposition parameterization in a chemistry general circulation model and its influence on the distribution of reactive trace gases. , 1995 .

[53]  Yvonne Andersson-Sköld,et al.  Secondary organic aerosol formation in northern Europe: A model study , 2001 .

[54]  Patrizia Lucialli,et al.  Harbour of Ravenna: The contribution of harbour traffic to air quality , 2007 .

[55]  Henk Eskes,et al.  Error analysis for tropospheric NO2 retrieval from space , 2004 .

[56]  E. Dlugokencky,et al.  Toward regional‐scale modeling using the two‐way nested global model TM5: Characterization of transport using SF6 , 2004 .

[57]  P. Kasibhatla,et al.  Impact of ship emissions on marine boundary layer NOx and SO2 Distributions over the Pacific Basin , 2001 .

[58]  Xavier Querol,et al.  Spatial and temporal variability in aerosol properties over the Mediterranean basin based on 6-year (2000-2006) MODIS data , 2008 .

[59]  C. N. Hewitt,et al.  A global model of natural volatile organic compound emissions , 1995 .

[60]  Steffen Beirle,et al.  Estimate of nitrogen oxide emissions from shipping by satellite remote sensing , 2004 .

[61]  Richard G. Derwent,et al.  The contribution from shipping emissions to air quality and acid deposition in Europe. , 2005 .

[62]  W. Collins,et al.  An AeroCom Initial Assessment - Optical Properties in Aerosol Component Modules of Global Models , 2005 .

[63]  Daniel Wang,et al.  Identification and characterization of inland ship plumes over Vancouver, BC , 2006 .

[64]  James J. Corbett,et al.  Effects of ship emissions on sulphur cycling and radiative climate forcing over the ocean , 1999, Nature.

[65]  Constantinos Sioutas,et al.  Seasonal and spatial trends in particle number concentrations and size distributions at the children's health study sites in Southern California , 2006, Journal of Exposure Science and Environmental Epidemiology.

[66]  A. Bouwman,et al.  A global high‐resolution emission inventory for ammonia , 1997 .

[67]  Mihalis Vrekoussis,et al.  Ozone variability in the marine boundary layer of the eastern Mediterranean based on 7‐year observations , 2005 .

[68]  Jeroen A. H. W. Peters,et al.  Recent trends in global greenhouse gas emissions:regional trends 1970–2000 and spatial distributionof key sources in 2000 , 2005 .

[69]  David G. Streets,et al.  Sulfur dioxide emissions and sulfur deposition from international shipping in Asian waters , 1997 .