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The implementation of the CLaMS Lagrangian transport core into the chemistry climate model EMAC 2.40.1: application on age of air and transport of long-lived trace species

Hoppe, Charlotte and Hoffmann, Lars and Konopka, Paul and Grooss, Jens-Uwe and Ploeger, F. and Günther, Gebhard and Jöckel, Patrick and Müller, Rolf (2014) The implementation of the CLaMS Lagrangian transport core into the chemistry climate model EMAC 2.40.1: application on age of air and transport of long-lived trace species. Geoscientific Model Development, 7, pp. 2639-2651. Copernicus Publications. DOI: 10.5194/gmd-7-2639-2014 ISSN 1991-959X

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Official URL: http://www.geosci-model-dev.net/7/2639/2014/gmd-7-2639-2014.html

Abstract

Lagrangian transport schemes have proven to be useful tools for modelling stratospheric trace gas transport since they are less diffusive than classical Eulerian schemes and therefore especially well suited for maintaining steep tracer gradients. Here, we present the implementation of the full-Lagrangian transport core of the Chemical Lagrangian Model of the Stratosphere (CLaMS) into the ECHAM/MESSy Atmospheric Chemistry model (EMAC). We performed a 10-year time-slice simulation to evaluate the coupled model system EMAC/CLaMS. Simulated zonal mean age of air distributions are compared to age of air derived from airborne measurements, showing a good overall representation of the stratospheric circulation. Results from the new Lagrangian transport scheme are compared to tracer distributions calculated with the standard flux-form semi-Lagrangian (FFSL) transport scheme in EMAC. The differences in the resulting tracer distributions are most pronounced in the regions of strong transport barriers. The polar vortices are presented as an example for isolated air masses which are surrounded by a strong transport barrier and simulated trace gas distributions are compared to satellite measurements. The analysis of CFC-11, N2O, CH4, and age of air in the polar vortex regions shows that the CLaMS Lagrangian transport scheme produces a stronger, more realistic transport barrier at the edge of the polar vortex than the FFSL transport scheme of EMAC. Differences in simulated age of air range up to 1 year in the Arctic polar vortex in late winter/early spring. The new coupled model system EMAC/CLaMS thus constitutes a suitable tool for future model studies of stratospheric tracer transport.

Item URL in elib:https://elib.dlr.de/91961/
Document Type:Article
Title:The implementation of the CLaMS Lagrangian transport core into the chemistry climate model EMAC 2.40.1: application on age of air and transport of long-lived trace species
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hoppe, CharlotteForschungszentrum Jülich, GermanyUNSPECIFIED
Hoffmann, LarsForschungszentrum Jülich, GermanyUNSPECIFIED
Konopka, PaulForschungszentrum Jülich, GermanyUNSPECIFIED
Grooss, Jens-UweForschungszentrum Jülich, GermanyUNSPECIFIED
Ploeger, F.Forschungszentrum Jülich, GermanyUNSPECIFIED
Günther, GebhardIForschungszentrum Jülich, GermanyUNSPECIFIED
Jöckel, PatrickDLR, IPAUNSPECIFIED
Müller, RolfForschungszentrum Jülich, GermanyUNSPECIFIED
Date:11 November 2014
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:7
DOI :10.5194/gmd-7-2639-2014
Page Range:pp. 2639-2651
Editors:
EditorsEmail
Stenke, AndreaUNSPECIFIED
Publisher:Copernicus Publications
ISSN:1991-959X
Status:Published
Keywords:EMAC, MESSy, CLaMS, Lagrangian Modelling, Airchemistry
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
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Earth System Modelling
Deposited By: Jöckel, Dr. Patrick
Deposited On:19 Nov 2014 11:04
Last Modified:02 May 2019 14:14

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