References

ACP

Atmospheric Chemistry and Physics

ACP

1680-7324

Copernicus GmbH

Göttingen, Germany

10.5194/acp-7-5129-2007

Climate impact of supersonic air traffic: an approach to optimize a potential future supersonic fleet – results from the EU-project SCENIC

Grewe

¹ Stenke

¹ Ponater

¹ Sausen

¹ Pitari

² Iachetti

² Rogers

³ Dessens

³ Pyle

³ Isaksen

I.S.A.

⁴ Gulstad

⁴ Søvde

O.A.

⁴ Marizy

⁵ Pascuillo

⁶

Deutsches Zentrum für Luft- und Raumfahrt, Institut für Physik der Atmosphäre, Oberpfaffenhofen, 82230 Wessling, Germany

Dipartimento di Fisica, Universita' L'Aquila, Italy

Center of Atmospheric Science, Department of Chemistry, University of Cambridge, United Kingdom

Department of Geoscience, University of Oslo, Norway

AIRBUS, Toulouse, France

AIRBUS, Hamburg, Germany

05 10 2007

7 19 5129 5145

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The demand for intercontinental transportation is increasing and people are requesting short travel times, which supersonic air transportation would enable. However, besides noise and sonic boom issues, which we are not referring to in this investigation, emissions from supersonic aircraft are known to alter the atmospheric composition, in particular the ozone layer, and hence affect climate significantly more than subsonic aircraft. Here, we suggest a metric to quantitatively assess different options for supersonic transport with regard to the potential destruction of the ozone layer and climate impacts. Options for fleet size, engine technology (nitrogen oxide emission level), cruising speed, range, and cruising altitude, are analyzed, based on SCENIC emission scenarios for 2050, which underlay the requirements to be as realistic as possible in terms of e.g., economic markets and profitable market penetration. This methodology is based on a number of atmosphere-chemistry and climate models to reduce model dependencies. The model results differ significantly in terms of the response to a replacement of subsonic aircraft by supersonic aircraft, e.g., concerning the ozone impact. However, model differences are smaller when comparing the different options for a supersonic fleet. Those uncertainties were taken into account to make sure that our findings are robust. The base case scenario, where supersonic aircraft get in service in 2015, a first fleet fully operational in 2025 and a second in 2050, leads in our simulations to a near surface temperature increase in 2050 of around 7 mK and with constant emissions afterwards to around 21 mK in 2100. The related total radiative forcing amounts to 22 mWm2 in 2050, with an uncertainty between 9 and 29 mWm2. A reduced supersonic cruise altitude or speed (from Mach 2 to Mach 1.6) reduces both, climate impact and ozone destruction, by around 40%. An increase in the range of the supersonic aircraft leads to more emissions at lower latitudes since more routes to SE Asia are taken into account, which increases ozone depletion, but reduces climate impact compared to the base case.

References 1

Appleman, H.: The formation of exhaust contrails by jet aircraft, Bull Americ Meteorol Soc., 43, 14–20, 1953.

Cess, R., Potter, G., Blanchet, J., Boer, G., Ghan, S., Kiehl, J., LeTreut, H., Li, Z.-X., Liang, X.-Z., Mitchell, J., Morcrette, J.-J., Randall, D., Riches, M., Roeckner, E., Schlese, U., Slingo, A., Taylor, K., Washington, W., Wetherald, R., and Yaga, I.: Interpretation of cloud-climate feedback as produced by 14 atmospheric general circulation models, Science, 245, 513–516, 1989.

Chipperfield, M. P., Santee, M. L., Froidevaux, L., Manney, G. L., Read, W. G., and Waters, J. W., Roche, A. E., and Russell, J. M.: Analysis of UARS data in the southern polar vortex in September 1992 using a chemical transport model, J. Geophys. Res., 1001, 18 861–18 882, 1996.

Chipperfield, M. P.: Multiannual simulations with a three-dimensional chemical transport model, J. Geophys. Res., 104, 1781–1806, 1999.

Crutzen, P.: Ozone production rates in an oxygen-hydrogen-nitrogen oxide atmosphere, J Geophys Res., 76, 7311–7327, 1971.

Fichter, C., Marquart, S., Sausen, R., and Lee, D S.: The impact of cruise altitude on contrails and related radiative forcing, Meteorologische Zeitschrift, 14, 563–572, \doi10.1127/0941-2948/2005/0048, 2005.

Forster, P. and Shine, K.: Radiative forcing and temperature trends from stratospheric ozone changes, J Geophys Res., 106, 10 841–10 855, 1997.

Forster, P., Ponater, M., and Zhong, W.-Y.: Testing Broadband Radiation Schemes for their Ability to Calculate the Radiative Forcing and Temperature Response to Stratospheric Water Vapour and Ozone Changes, Meteorol Z., 10, 387–393, 2001.

Fuglestvedt, J., Berntsen, T., Godal, O., Sausen, R., Shine, K., and Skodvin, T.: Metrics of climate change: Assessing radiative forcing and emission indices, Clim. Change, 58, 267–331, 2003.

Grewe, V.: Impact of climate variability on tropospheric ozone, Sci. Tot. Environm., 374, 167–181, doi:10.1016/j.scitotenv.2007.01.032, 2007.

Grewe, V. and Stenke, A.: A strategy for climate evaluation of aircraft technology: An efficient climate impact assessment tool - AirClim, Atmos. Chem. Physc. Discuss., 7, 12 185–12 229, 2007.

Grewe, V., Dameris, M., Fichter, C., and Sausen, R.: Impact of aircraft NO$\rm_x$ emissions. Part 1: Interactively coupled climate-chemistry simulations and sensitivities to climate-chemistry feedback, lightning and model resolution, Meteorol. Z., 3, 177–186, 2002.

Hall, T. and Plumb, R.: Age as a diagnostic for stratospheric transport, J Geophys Res., 99, 1059–1070, 1994.

Hansen, J., Sato, M., and Ruedy, R.: Radiative forcing and climate response, J Geophys Res., 102, 6831–6864, 1997.

Hansen, J., Sato, M., Ruedy, R., Nazarenko, L., Lacis, A., Schmidt, G., Russell, G., Aleinov, I., Bauer, M., Bauer, S., Bell, N., Cairns, B., Canuto, V., Chandler, M., Cheng, Y., DelGenio, A., Faluvegi, G., Fleming, E., Friend, A., Hall, T., Jackman, C., Kelley, M., Kiang, N., Koch, D., Lean, J., Lerner, J., Lo, K., Menon, S., Miller, R., Minnis, O., Novakov, T., Oinas, V., Perlwitz, J., Perlwitz, J., Rind, D., Romanou, A., Shindell, D., Stone, P., Sun, S., Tausnev, N., Tresher, D., Wielicki, B., Wong, T., and Zhang, S.: Efficacy of climate forcings, J Geophys Res., 110, D18104, doi:10.1029/2005JD005776, 2005.

Hein, R., Damaris, M., Schnadt, C., Land, C., Grewe, V., Kóhler, I., Ponater, M., Sausen, R., Steil, B., Landgraf, J., and Br\'uhl, C.: Results of an interactively coupled atmospheric chemistry-general circulation model: Comparison with observations, Ann Geophys., 19, 435–457, 2001.

Holton, J., Haynes, P., McIntyre, M., Douglass, A., Rood, R., and Pfister, L.: Stratosphere-troposphere exchange, Rev Geophys., 33, 403–439, 1995.

IPCC: Climate Change 1994. The radiative forcing of climate change and an evaluation of the IPCC IS92 emission scenarios., Intergovernmental Panel on Climate Change, Cambridge University Press, New York, NY, USA, 1995.

IPCC: Special report on aviation and the global atmosphere, edited by: Penner, J. E., Lister, D. H., Griggs, D. J., Dokken, D. J., and McFarland, M., Intergovernmental Panel on Climate Change, Cambridge University Press, New York, NY, USA, 1999.

IPCC: Climate Change 2001 – The scientific basis. Contributions of working group I to the Third Assessment Report of the Intergovernmental Panel of Climate Change (IPCC), Intergovernmental Panel on Climate Change, Cambridge University Press, New York, NY, USA, 2001.

IPCC: Climate Change 2007 – The Physical Science Basis Contribution of Working Group I to the Fourth Assessment Report of the IPCC, Intergovernmental Panel on Climate Change, Cambridge University Press, New York, NY, USA, 2007.

Isaksen, I., Zerefos, C., Kourtidis, K., Meleti, C., Dalsøren, S B., Sundet, J K., Grini, A., Zanis, P., and Balis, D.: Tropospheric ozone changes at unpolluted and semipolluted regions induced by stratospheric ozone changes, J. Geophys. Res., 110, D02302, doi:10.1029/2004JD004618, 2005.

Johnson, C. and Derwent, R.: Relative radiative forcing consequences of global emissions of hydrocarbons, carbon monoxide and NO$\rm_x$ from human activities estimated with a zonally-averaged two dimensional model, Clim. Change, 34, 439–462, 1996.

Johnston, H.: Reduction of stratospheric ozone by nitrogen oxide catalysts from supersonic transport exhaust, Science, 173, 517–522, 1971.

Joshi, M., Shine, K., Ponater, M., Stuber, N., Sausen, R., and Li, L.: A comparison of climate response to different radiative forcings in three general circulation models: towards an improved metric of climate change, Climate Dyn., 20, 843–854, 2003.

Land, C., Ponater, M., Sausen, R., and Roeckner, E.: The ECHAM4.L39(DLR) atmosphere GCM, Technical description and climatology, DLR-Forschungsbericht, 1991–31, 45 pp., ISSN 1434-8454, Deutsches Zentrum für Luft- und Raumfahrt, Köln, Germany, 1999.

Manabe, S. and Wetherald, R.: The effects of doubling the CO2 concentration on the climate of a general circulation model, J. Atmos. Sci., 32, 3–15, 1975.

Marquart, S. and Mayer, B.: Towards a reliable GCM estimation of contrail radiative forcing, Geophys. Res. Lett., 29, 1179, doi:10.1029/2001GL014075, 2002.

Marquart, S., Ponater, M., Mager, F., and Sausen, R.: Future development of contrail cover, optical depth and radiative forcing: Impacts of increasing air traffic and climate change, J. Climate, 16, 2890–2904, 2003.

Meyer, R., Büll, R., Leiter, C., Mannstein, H., Pechtl, S., Oki, T., and Wendling, P.: Contrail observations over Southern and Eastern Asia in NOAA/AVHRR data and intercomparison to contrail simulations in a GCM, Int. J. Remote Sens., 28, 2049–2069, doi:10.1080/01431160600641707, 2007.

Pitari, G., Mancini, E., and Bregman, A.: Climate forcing of subsonic aviation: Impact of sulfate particles via heterogeneous chemistry, Geophys. Res. Lett., 29, 14–1–14–4, 2002.

Pitari, G., Mancini, E., Rizi, V., and Shindell, D. T.: Impact of future climate and emission changes on stratospheric aerosols and ozone, J. Atmos. Sci., 59, 414–440, 2002a. %

%Pitari, G., Iachetti, D., Mancini, E., Montanaro, V., Marizy, C., Dessens, O., % Rogers, H., Pyle, J., Grewe, V., Stenke, A., and S\ovde, O.: Radiative % forcing from particle emissions by future supersonic aircraft, Atmos. Chem. % Physc. Discuss., in preparation, 2007.

Ponater, M., Marquart, S., and Sausen, R.: Contrails in a comprehensive global climate model: Parameterisation and radiative forcing results, J. Geophys. Res., 107, 4164, doi:10.1029/2001JD000429, 2002.

Ponater, M., Marquart, S., Sausen, R., and Schumann, U.: On contrail climate sensitivity, Geophys. Res. Lett., 32, L10706, doi:10.1029/2005GL022580, 2005.

Ponater, M., Pechtl, S., Sausen, R., Schumann, U., and Hüttig, G.: Potential of the cryoplane technology to reduce aircraft climate impact: A state-of-the-art assessment, Atmos Environm., 40, 6928–6944, doi:10.1016/j.atmosenv.2006.06.036, 2006.

Prather, M.: Numerical advection by conservation of second-order moments, J. Geophys. Res., 91, 6671–6681, 1986. %

%Rogers, H., Marizy, C., Pascuillo, E., Egelhofer, R., and Pyle, J.: Design options for future European supersonic transport, Atmos. Chem. Physc. % Discuss., in preparation, 2007.

Sausen, R. and Schumann, U.: Estimates of the climate response to aircraft CO2 and NO$\rm_x$ emissions scenarios, Clim. Change, 44, 25–58, 2000.

Sausen, R., Isaksen, I., Grewe, V., Hauglustaine, D., Lee, D S., Myhre, G., Köhler, M O., Pitari, G., Schumann, U., Stordal, F., and Zerefos, C.: Aviation Radiative Forcing in 2000: An Update on IPCC (1999), Meteorol. Z., 14, 555–561, 2005.

Schmidt, E.: Die Entstehung von Eisnebel aus den Auspuffgasen von Flugmotoren, Schriften der deutschen Akademie der Luftfahrtforschung, 44, 1–15, 1941.

S\ovde, O., Gauss, M., Isaksen, I., Pitari, G., and Marizy, C.: Aircraft pollution – a futuristic view, Atmos. Chem. Physc., 7, 3621–3632, 2007.

Stenke, A., Grewe, V., and Pechtl, S.: Do supersonics avoid contrails?, Atmos. Chem. Phys. Discuss., 7, 12 927–12 958, 2007a. %

%Stenke, A., Grewe, V., and Ponater, M.: Lagrangian transport of water vapor and % cloud water in the ECHAM4 GCM and its impact on the cold bias, J Climate, revised\blackbox\bf status?, 2007b.

Stuber, N., Sausen, R., and Ponater, M.: Stratosphere adjusted radiative forcing calculations in a comprehensive climate model, Theor. Appl. Climatol., 68, 125–135, 2001.

Stuber, N., Ponater, M., and Sausen, R.: Why radiative forcing might fail as a predictor of climate change, Clim. Dyn., 24, 497–510, doi:10.1007/s00382–004–0497–7, 2005.

Sundet, J. K.: Model Studies with a 3-D Global CTM using ECMWF data, Dept. of Geophysics, University of Oslo, Norway, 1997.

Svensson, F., Hasselrot, A., and Moldanova, J.: Reduced environmental impact by lowered cruise altitude for liquid hydrogen-fuelled aircraft, Aerosp. Sci. Technol., 8, 307–320, 2004.

Taalas, P., Damski, J., Kyrö, E., Ginzburg, M., and Talamoni, G.: Effect of stratospheric ozone variations on UV radiation and on tropospheric ozone at high latitudes, J. Geophys. Res., 102, 1533–1540, 1997.

Wetherald, R. and Manabe, S.: The effects of changing the solar constant on the climate of a general circulation model, J. Atmos. Sci., 32, 2044–2059, 1975.