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Global modelling of ice nucleating particles and their effects on cirrus clouds

Beer, Christof Gerhard (2021) Global modelling of ice nucleating particles and their effects on cirrus clouds. Dissertation, Ludwig-Maximilians Universität München und DLR Institut für Physik der Atmosphäre. doi: 10.5282/EDOC.28470.

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Atmospheric ice nucleating aerosol particles (INPs) can influence the climate system by modifying cloud properties and consequently the Earth's radiation budget. However, these aerosol-cloud interactions and their effects on the global scale, especially regarding cirrus clouds, are still only poorly understood, and subject to large uncertainties. In this thesis INP-induced modifications of cirrus clouds are analysed by employing the atmospheric chemistry general circulation model EMAC, including the aerosol microphysics submodel MADE3. To facilitate the analysis of INP-effects, model improvements and developments with respect to the representation of ice nucleating particles are applied. Besides mineral dust and soot aerosols, additional types of INPs are implemented, i.e. crystalline ammonium sulfate and glassy organic particles. A global climatology of the different INP-types is presented and global effects on cirrus coud properties and the radiative balance are quantified. Sensitivities with respect to the freezing efficiency of INPs, to the vertical velocities during cloud formation, and the effects of anthropogenic INPs are analysed.

Item URL in elib:https://elib.dlr.de/145231/
Document Type:Thesis (Dissertation)
Title:Global modelling of ice nucleating particles and their effects on cirrus clouds
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Beer, Christof GerhardDLR, IPAhttps://orcid.org/0000-0003-3815-0007
Date:7 July 2021
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Number of Pages:172
Keywords:Global atmospheric chemistry-climate model, atmospheric aerosol, aerosol modelling, aerosol-cloud-interaction, ice-nucleating particles, cirrus clouds, radiative forcing
Institution:Ludwig-Maximilians Universität München und DLR Institut für Physik der Atmosphäre
Department:Fakultät für Physik
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 > Earth System Modelling
Deposited By: Beer, Dr. Christof Gerhard
Deposited On:05 Nov 2021 15:02
Last Modified:05 Nov 2021 15:02

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