Implementation of a comprehensive ice crystal formation parameterization for cirrus and mixed-phase clouds in the EMAC model (based on MESSy 2.53)
Abstract
A comprehensive ice nucleation parameterization has been implemented in the global chemistry-climate model EMAC to improve the representation of ice crystal number concentrations (ICNCs). The parameterization of Barahona and Nenes (2009, hereafter BN09) allows for the treatment of ice nucleation taking into account the competition for water vapour between homogeneous and heterogeneous nucleation in cirrus clouds. Furthermore, the influence of chemically heterogeneous, polydisperse aerosols is considered by applying one of the multiple ice nucleating particle parameterizations which are included in BN09 to compute the heterogeneously formed ice crystals. BN09 has been modified in order to consider the pre-existing ice crystal effect and implemented to operate both in the cirrus and in the mixed-phase regimes. Compared to the standard EMAC parameterizations, BN09 produces fewer ice crystals in the upper troposphere but higher ICNCs in the middle troposphere, especially in the Northern Hemisphere where ice nucleating mineral dust particles are relatively abundant. Overall, ICNCs agree well with the observations, especially in cold cirrus clouds (at temperatures below 205K), although they are underestimated between 200 and 220K. As BN09 takes into account processes which were previously neglected by the standard version of the model, it is recommended for future EMAC simulations.
- Authors:
-
[2];
[4];
[6];
[7];
[1]
- Max Planck Institute for Chemistry, Mainz (Germany). Atmospheric Chemistry Department
- Georgia Inst. of Technology, Atlanta, GA (United States). School of Chemical and Biomolecular Engineering
- NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
- Institute for Energy and Climate Research, Julich (Germany)
- Georgia Inst. of Technology, Atlanta, GA (United States). School of Chemical and Biomolecular Engineering and School of Earth and Atmospheric Sciences; ICE-HT, Foundation for Research and Technology, Hellas (Greece); IERSD, National Observatory of Athens (Greece); École Polytechnique Fédérale de Lausanne (Switzerland). Laboratory of Atmospheric Processes and Their Impact
- Johannes Gutenberg University Mainz (Germany). Institute for Atmospheric Physics
- Max Planck Institute for Chemistry, Mainz (Germany). Atmospheric Chemistry Department; The Cyprus Institute, Nicosia (Cyprus). Energy, Environment and Water Research Center
- Publication Date:
- Research Org.:
- Georgia Institute of Technology, Atlanta, GA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1483476
- Grant/Contract Number:
- SC0007145
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Geoscientific Model Development (Online)
- Additional Journal Information:
- Journal Name: Geoscientific Model Development (Online); Journal Volume: 11; Journal Issue: 10; Journal ID: ISSN 1991-9603
- Publisher:
- European Geosciences Union
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 58 GEOSCIENCES
Citation Formats
Bacer, Sara, Sullivan, Sylvia C., Karydis, Vlassis A., Barahona, Donifan, Krämer, Martina, Nenes, Athanasios, Tost, Holger, Tsimpidi, Alexandra P., Lelieveld, Jos, and Pozzer, Andrea. Implementation of a comprehensive ice crystal formation parameterization for cirrus and mixed-phase clouds in the EMAC model (based on MESSy 2.53). United States: N. p., 2018.
Web. doi:10.5194/gmd-11-4021-2018.
Bacer, Sara, Sullivan, Sylvia C., Karydis, Vlassis A., Barahona, Donifan, Krämer, Martina, Nenes, Athanasios, Tost, Holger, Tsimpidi, Alexandra P., Lelieveld, Jos, & Pozzer, Andrea. Implementation of a comprehensive ice crystal formation parameterization for cirrus and mixed-phase clouds in the EMAC model (based on MESSy 2.53). United States. https://doi.org/10.5194/gmd-11-4021-2018
Bacer, Sara, Sullivan, Sylvia C., Karydis, Vlassis A., Barahona, Donifan, Krämer, Martina, Nenes, Athanasios, Tost, Holger, Tsimpidi, Alexandra P., Lelieveld, Jos, and Pozzer, Andrea. Fri .
"Implementation of a comprehensive ice crystal formation parameterization for cirrus and mixed-phase clouds in the EMAC model (based on MESSy 2.53)". United States. https://doi.org/10.5194/gmd-11-4021-2018. https://www.osti.gov/servlets/purl/1483476.
@article{osti_1483476,
title = {Implementation of a comprehensive ice crystal formation parameterization for cirrus and mixed-phase clouds in the EMAC model (based on MESSy 2.53)},
author = {Bacer, Sara and Sullivan, Sylvia C. and Karydis, Vlassis A. and Barahona, Donifan and Krämer, Martina and Nenes, Athanasios and Tost, Holger and Tsimpidi, Alexandra P. and Lelieveld, Jos and Pozzer, Andrea},
abstractNote = {A comprehensive ice nucleation parameterization has been implemented in the global chemistry-climate model EMAC to improve the representation of ice crystal number concentrations (ICNCs). The parameterization of Barahona and Nenes (2009, hereafter BN09) allows for the treatment of ice nucleation taking into account the competition for water vapour between homogeneous and heterogeneous nucleation in cirrus clouds. Furthermore, the influence of chemically heterogeneous, polydisperse aerosols is considered by applying one of the multiple ice nucleating particle parameterizations which are included in BN09 to compute the heterogeneously formed ice crystals. BN09 has been modified in order to consider the pre-existing ice crystal effect and implemented to operate both in the cirrus and in the mixed-phase regimes. Compared to the standard EMAC parameterizations, BN09 produces fewer ice crystals in the upper troposphere but higher ICNCs in the middle troposphere, especially in the Northern Hemisphere where ice nucleating mineral dust particles are relatively abundant. Overall, ICNCs agree well with the observations, especially in cold cirrus clouds (at temperatures below 205K), although they are underestimated between 200 and 220K. As BN09 takes into account processes which were previously neglected by the standard version of the model, it is recommended for future EMAC simulations.},
doi = {10.5194/gmd-11-4021-2018},
journal = {Geoscientific Model Development (Online)},
number = 10,
volume = 11,
place = {United States},
year = {Fri Oct 05 00:00:00 EDT 2018},
month = {Fri Oct 05 00:00:00 EDT 2018}
}
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