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Towards a reassessment of the climate effect of ocean-going ships

Kaiser, Christopher (2013) Towards a reassessment of the climate effect of ocean-going ships. In: Next Generation Forum 2013, p. 79. Deutsches Zentrum für Luft- und Raumfahrt e. V., Programmdirektion Verkehr. Next Generation Forum 2013, 23-24 Oct 2013, Stuttgart, Germany.

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Official URL: http://portal.dlr.de/Organisation/Organisationseinheiten/ProgrDirektionQuerschnittsaufg/pdv/Next%20Generation%20Forum/Next%20Generation%20Forum%202013/2013-10-09%20JMP%20Tagungsband%20NGF%202013.pdf

Abstract

We introduce MADE3 (Modal Aerosol Dynamics model for Europe, adapted for global applications, 3rd generation; version: MADE3v2.0b), an aerosol dynamics submodel for application within the MESSy framework (Modular Earth Submodel System). MADE3 builds on the predecessor aerosol submodels MADE and MADE-in. Its main new features are the explicit representation of coarse mode particle interactions both with other particles and with condensable gases, and the inclusion of hydrochloric acid (HCl) / chloride (Cl) partitioning between the gas and condensed phases. The aerosol size distribution is represented in the new submodel as a superposition of nine lognormal modes: one for fully soluble particles, one for insoluble particles, and one for mixed particles in each of three size ranges (Aitken, accumulation, and coarse mode size ranges). In order to assess the performance of MADE3 we compare it to its predecessor MADE and to the much more detailed particle-resolved aerosol model PartMC-MOSAIC in a box model simulation of an idealised marine boundary layer test case. MADE3 and MADE results are very similar, except in the coarse mode, where the aerosol is dominated by sea spray particles. Cl is reduced in MADE3 with respect to MADE due to the HCl / Cl partitioning that leads to Cl removal from the sea spray aerosol in our test case. Additionally, the aerosol nitrate concentration is higher in MADE3 due to the condensation of nitric acid on coarse mode particles. MADE3 and PartMC-MOSAIC show substantial differences in the fine particle size distributions (sizes ≲ 2 μm) that could be relevant when simulating climate effects on a global scale. Nevertheless, the agreement between MADE3 and PartMC-MOSAIC is very good when it comes to coarse particle size distributions (sizes ≳ 2 μm), and also in terms of aerosol composition. Considering these results and the well-established ability of MADE in reproducing observed aerosol loadings and composition, MADE3 seems suitable for application within a global model.

Item URL in elib:https://elib.dlr.de/103320/
Document Type:Conference or Workshop Item (Poster)
Title:Towards a reassessment of the climate effect of ocean-going ships
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kaiser, ChristopherDLR, IPAUNSPECIFIED
Date:23 October 2013
Journal or Publication Title:Next Generation Forum 2013
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:p. 79
Editors:
EditorsEmail
Pfeiffer, Jean-Marcjean-marc.pfeiffer@dlr.de
Publisher:Deutsches Zentrum für Luft- und Raumfahrt e. V., Programmdirektion Verkehr
Status:Published
Keywords:aerosol,atmosphere,coarse mode,climate model,ship emissions
Event Title:Next Generation Forum 2013
Event Location:Stuttgart, Germany
Event Type:Other
Event Dates:23-24 Oct 2013
Organizer:DLR
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Atmosphären- und Klimaforschung, L - Climate, Weather and Environment, V - no assignment
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Earth System Modelling
Deposited By: Kaiser, Christopher
Deposited On:09 Mar 2016 13:18
Last Modified:29 Aug 2017 08:58

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