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Radiative forcing from particle emissions by future supersonic aircraft

Pitari, G. and Iachetti, D. and Mancini, E. and Montanaro, V. and De Luca, N. and Marizy, C. and Dessens, O. and Rogers, H. and Pyle, J. and Grewe, V. and Stenke, A. and Søvde, O.A. (2008) Radiative forcing from particle emissions by future supersonic aircraft. Atmospheric Chemistry and Physics, 8, pp. 4069-4084.

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Official URL: http://www.atmos-chem-phys.net/8/4069/2008/acp-8-4069-2008.pdf


In this work we focus on the direct radiative forcing (RF) of black carbon (BC) and sulphuric acid particles emitted by future supersonic aircraft, as well as on the ozone RF due to changes produced by emissions of both gas species (NOx, H<sub>2</sub>O) and aerosol particles capable of affecting stratospheric ozone chemistry. Heterogeneous chemical reactions on the surface of sulphuric acid stratospheric particles (SSA-SAD) are the main link between ozone chemistry and supersonic aircraft emissions of sulphur precursors (SO<sub>2</sub>) and particles (H<sub>2</sub>O–H<sub>2</sub>SO<sub>4</sub>). Photochemical O<sub>3</sub> changes are compared from four independent 3-D atmosphere-chemistry models (ACMs), using as input the perturbation of SSA-SAD calculated in the University of L'Aquila model, which includes on-line a microphysics code for aerosol formation and growth. The ACMs in this study use aircraft emission scenarios for the year 2050 developed by AIRBUS as a part of the EU project SCENIC, assessing options for fleet size, engine technology (NOx emission index), Mach number, range and cruising altitude. From our baseline modeling simulation, the impact of supersonic aircraft on sulphuric acid aerosol and BC mass burdens is 53 and 1.5 μg/m<sup>2</sup>, respectively, with a direct RF of −11.4 and 4.6 mW/m<sup>2</sup> (net RF=−6.8 mW/m<sup>2</sup>). This paper discusses the similarities and differences amongst the participating models in terms of changes to O<sub>3</sub> precursors due to aircraft emissions (NOx, HOx,Clx,Brx) and the stratospheric ozone sensitivity to them. In the baseline case, the calculated global ozone change is −0.4 ±0.3 DU, with a net radiative forcing (IR+UV) of −2.5± 2 mW/m<sup>2</sup>. The fraction of this O<sub>3</sub>-RF attributable to SSA-SAD changes is, however, highly variable among the models, depending on the NOx removal efficiency from the aircraft emission regions by large scale transport.

Document Type:Article
Title:Radiative forcing from particle emissions by future supersonic aircraft
AuthorsInstitution or Email of Authors
Pitari, G.Univ. L'Aquila, I
Iachetti, D.Univ. L'Aquila, I
Mancini, E.Univ. L'Aquila, I
Montanaro, V.Univ. L'Aquila, I
De Luca, N.Univ. L'Aquila, I
Marizy, C.AIRBUS, Toulouse, F
Dessens, O.Univ. of Cambridge, Cambridge, UK
Rogers, H.Univ. of Cambridge, Cambridge, UK
Pyle, J.Univ. of Cambridge, Cambridge, UK
Søvde, O.A.Univ. of Oslo, N
Journal or Publication Title:Atmospheric Chemistry and Physics
Page Range:pp. 4069-4084
Keywords:black carbon, sulphuric acid particles, supersonic aircraft, radiative forcing, climate impact
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:L VU - Air Traffic and Environment (old)
DLR - Research area:Aeronautics
DLR - Program:L VU - Air Traffic and Environment
DLR - Research theme (Project):L - Low-Emission Air Traffic (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Dynamics
Deposited By: Dr.rer.nat. Andrea Stenke
Deposited On:26 Aug 2008
Last Modified:12 Dec 2013 20:32

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