elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

A quasi chemistry-transport model mode for EMAC

Deckert, Rudolf and Jöckel, Patrick and Grewe, Volker and Gottschaldt, Klaus-Dirk and Hoor, Peter (2011) A quasi chemistry-transport model mode for EMAC. Geoscientific Model Development, 4, pp. 195-206. Copernicus Publications. DOI: 10.5194/gmd-4-195-2011 ISSN 1991-959X

Full text not available from this repository.

Official URL: http://www.geosci-model-dev.net/4/195/2011/

Abstract

A quasi chemistry-transport model mode (QCTM) is presented for the numerical chemistry-climate simulation system ECHAM/MESSy Atmospheric Chemistry (EMAC). It allows for a quantification of chemical signals through sup- pression of any feedback between chemistry and dynamics. Noise would otherwise interfere too strongly. The signal is calculated from the difference of two QCTM simulations, a reference simulation and a sensitivity simulation. In order to avoid the feedbacks, the simulations adopt the following of- fline chemical fields: (a) offline mixing ratios of radiatively active substances enter the radiation scheme, (b) offline mix- ing ratios of nitric acid enter the scheme for re-partitioning and sedimentation from polar stratospheric clouds, (c) and offline methane oxidation is the exclusive source of chemi- cal water-vapor tendencies. Any set of offline fields suffices to suppress the feedbacks, though may be inconsistent with the simulation setup. An adequate set of offline climatolo- gies can be produced from a non-QCTM simulation using the setup of the reference simulation. Test simulations reveal the particular importance of adequate offline fields associated with (a). Inconsistencies from (b) are negligible when using adequate fields of nitric acid. Acceptably small inconsisten- cies come from (c), but should vanish for an adequate pre- scription of chemical water vapor tendencies. Toggling be- tween QCTM and non-QCTM is done via namelist switches and does not require a source code re-compilation.

Item URL in elib:https://elib.dlr.de/97609/
Document Type:Article
Title:A quasi chemistry-transport model mode for EMAC
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Deckert, RudolfDLR, IPAUNSPECIFIED
Jöckel, PatrickDLR, IPAUNSPECIFIED
Grewe, VolkerDLR, IPAUNSPECIFIED
Gottschaldt, Klaus-DirkDLR, IPAUNSPECIFIED
Hoor, PeterUniv. Mainz, MainzUNSPECIFIED
Date:2011
Journal or Publication Title:Geoscientific Model Development
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:4
DOI :10.5194/gmd-4-195-2011
Page Range:pp. 195-206
Publisher:Copernicus Publications
ISSN:1991-959X
Status:Published
Keywords:EMAC, QCTM
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:air traffic management and operations
DLR - Research area:Aeronautics
DLR - Program:L AO - Air Traffic Management and Operation
DLR - Research theme (Project):L - Climate, Weather and Environment
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Earth System Modelling
Deposited By: Beer, Winfried
Deposited On:28 Jul 2015 07:42
Last Modified:02 May 2019 14:14

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.