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

Coupling aerosols to (cirrus) clouds in the global EMAC-MADE3 aerosol-climate model

Righi, Mattia and Hendricks, Johannes and Lohmann, Ulrike and Beer, Christof Gerhard and Hahn, Valerian and Heinold, Bernd and Heller, Romy and Krämer, Martina and Ponater, Michael and Rolf, Christian and Tegen, Ina and Voigt, Christiane (2020) Coupling aerosols to (cirrus) clouds in the global EMAC-MADE3 aerosol-climate model. Geoscientific Model Development, 13 (3), pp. 1635-1661. Copernicus Publications. doi: 10.5194/gmd-13-1635-2020. ISSN 1991-959X.

[img] PDF - Published version
7MB

Official URL: http://dx.doi.org/10.5194/gmd-13-1635-2020

Abstract

A new cloud microphysical scheme including a detailed parameterization for aerosol-driven ice formation in cirrus clouds is implemented in the global ECHAM/MESSy Atmospheric Chemistry (EMAC) chemistry–climate model and coupled to the third generation of the Modal Aerosol Dynamics model for Europe adapted for global applications (MADE3) aerosol submodel. The new scheme is able to consistently simulate three regimes of stratiform clouds – liquid, mixed-, and ice-phase (cirrus) clouds – considering the activation of Aerosol particles to form cloud droplets and the nucleation of ice crystals. In the cirrus regime, it allows for the competition between homogeneous and heterogeneous freezing for the available supersaturated water vapor, taking into account different types of ice-nucleating particles, whose specific ice-nucleating properties can be flexibly varied in the model setup. The new model configuration is tuned to find the optimal set of parameters that minimizes the model deviations with respect to observations. A detailed evaluation is also performed comparing the model results for standard cloud and radiation variables with a comprehensive set of observations from satellite retrievals and in situ measurements. The performance of EMAC-MADE3 in this new coupled configuration is in line with similar global coupled models and with other global aerosol models featuring ice cloud parameterizations. Some remaining discrepancies, namely a high positive bias in liquid water path in the Northern Hemisphere and overestimated (underestimated) cloud droplet number concentrations over the tropical oceans (in the extratropical regions), which are both a common problem in these kinds of models, need to be taken into account in future applications of the model. To further demonstrate the readiness of the new model system for application studies, an estimate of the anthropogenic aerosol effective radiative forcing (ERF) is provided, showing that EMAC-MADE3 simulates a relatively strong aerosol-induced cooling but within the range reported in the Intergovernmental Panel on Climate Change (IPCC) assessments.

Item URL in elib:https://elib.dlr.de/134581/
Document Type:Article
Title:Coupling aerosols to (cirrus) clouds in the global EMAC-MADE3 aerosol-climate model
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Righi, MattiaDLR, IPAhttps://orcid.org/0000-0003-3827-5950
Hendricks, JohannesDLR, IPAUNSPECIFIED
Lohmann, UlrikeETH Zürich, CHUNSPECIFIED
Beer, Christof GerhardDLR, IPAUNSPECIFIED
Hahn, ValerianDLR, IPAUNSPECIFIED
Heinold, BerndTROPOS, LeipzigUNSPECIFIED
Heller, RomyDLR, IPAUNSPECIFIED
Krämer, MartinaFZ JülichUNSPECIFIED
Ponater, MichaelDLR, IPAhttps://orcid.org/0000-0002-9771-4733
Rolf, ChristianFZ JülichUNSPECIFIED
Tegen, InaTROPOS, LeipzigUNSPECIFIED
Voigt, ChristianeDLR, IPAhttps://orcid.org/0000-0001-8925-7731
Date:30 March 2020
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:13
DOI :10.5194/gmd-13-1635-2020
Page Range:pp. 1635-1661
Publisher:Copernicus Publications
ISSN:1991-959X
Status:Published
Keywords:Global modelling, Climate, Aerosol, Clouds, Cirrus
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Transport System
DLR - Research area:Transport
DLR - Program:V VS - Verkehrssystem
DLR - Research theme (Project):V - Transport und Klima
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics
Institute of Atmospheric Physics > Earth System Modelling
Institute of Atmospheric Physics > Cloud Physics
Deposited By: Righi, Dr. Mattia
Deposited On:07 Apr 2020 10:37
Last Modified:07 Apr 2020 10:37

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.