Implementation of aerosol–cloud interactions in the regional atmosphere–aerosol model COSMO-MUSCAT(5.0) and evaluation using satellite data
The regional atmospheric model Consortium for Small-scale Modeling (COSMO) coupled to the Multi-Scale Chemistry Aerosol Transport model (MUSCAT) is extended in this work to represent aerosol–cloud interactions. Previously, only one-way interactions (scavenging of aerosol and in-cloud chemistry) a...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2017-06-01
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| Series: | Geoscientific Model Development |
| Online Access: | http://www.geosci-model-dev.net/10/2231/2017/gmd-10-2231-2017.pdf |
| _version_ | 1811255771337326592 |
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| author | S. Dipu J. Quaas R. Wolke J. Stoll A. Mühlbauer O. Sourdeval M. Salzmann B. Heinold I. Tegen |
| author_facet | S. Dipu J. Quaas R. Wolke J. Stoll A. Mühlbauer O. Sourdeval M. Salzmann B. Heinold I. Tegen |
| author_sort | S. Dipu |
| collection | DOAJ |
| description | The regional atmospheric model Consortium for Small-scale Modeling
(COSMO) coupled to the Multi-Scale Chemistry Aerosol Transport model (MUSCAT)
is extended in this work to represent aerosol–cloud interactions. Previously,
only one-way interactions (scavenging of aerosol and in-cloud chemistry) and
aerosol–radiation interactions were included in this model. The new version
allows for a microphysical aerosol effect on clouds. For this, we use the
optional two-moment cloud microphysical scheme in COSMO and the
online-computed aerosol information for cloud condensation nuclei concentrations
(<i>C</i><sub>ccn</sub>), replacing the constant <i>C</i><sub>ccn</sub> profile. In the
radiation scheme, we have implemented a droplet-size-dependent cloud optical
depth, allowing now for aerosol–cloud–radiation interactions. To evaluate the
models with satellite data, the Cloud Feedback Model Intercomparison Project
Observation Simulator Package (COSP) has been implemented. A case study has
been carried out to understand the effects of the modifications, where the
modified modeling system is applied over the European domain with a
horizontal resolution of 0.25° × 0.25°. To reduce the
complexity in aerosol–cloud interactions, only warm-phase clouds are
considered. We found that the online-coupled aerosol introduces significant
changes for some cloud microphysical properties. The cloud effective radius
shows an increase of 9.5 %, and the cloud droplet number concentration is
reduced by 21.5 %. |
| first_indexed | 2024-04-12T17:30:03Z |
| format | Article |
| id | doaj.art-4361b595904e427b94baa38d8827a028 |
| institution | Directory Open Access Journal |
| issn | 1991-959X 1991-9603 |
| language | English |
| last_indexed | 2024-04-12T17:30:03Z |
| publishDate | 2017-06-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Geoscientific Model Development |
| spelling | doaj.art-4361b595904e427b94baa38d8827a0282022-12-22T03:23:10ZengCopernicus PublicationsGeoscientific Model Development1991-959X1991-96032017-06-01102231224610.5194/gmd-10-2231-2017Implementation of aerosol–cloud interactions in the regional atmosphere–aerosol model COSMO-MUSCAT(5.0) and evaluation using satellite dataS. Dipu0J. Quaas1R. Wolke2J. Stoll3A. Mühlbauer4O. Sourdeval5M. Salzmann6B. Heinold7I. Tegen8Institute for Meteorology, Universität Leipzig, Leipzig, GermanyInstitute for Meteorology, Universität Leipzig, Leipzig, GermanyLeibniz Institute for Tropospheric Research, Leipzig, GermanyLeibniz Institute for Tropospheric Research, Leipzig, GermanyFM Global Research, Norwood, MA, USAInstitute for Meteorology, Universität Leipzig, Leipzig, GermanyInstitute for Meteorology, Universität Leipzig, Leipzig, GermanyLeibniz Institute for Tropospheric Research, Leipzig, GermanyLeibniz Institute for Tropospheric Research, Leipzig, GermanyThe regional atmospheric model Consortium for Small-scale Modeling (COSMO) coupled to the Multi-Scale Chemistry Aerosol Transport model (MUSCAT) is extended in this work to represent aerosol–cloud interactions. Previously, only one-way interactions (scavenging of aerosol and in-cloud chemistry) and aerosol–radiation interactions were included in this model. The new version allows for a microphysical aerosol effect on clouds. For this, we use the optional two-moment cloud microphysical scheme in COSMO and the online-computed aerosol information for cloud condensation nuclei concentrations (<i>C</i><sub>ccn</sub>), replacing the constant <i>C</i><sub>ccn</sub> profile. In the radiation scheme, we have implemented a droplet-size-dependent cloud optical depth, allowing now for aerosol–cloud–radiation interactions. To evaluate the models with satellite data, the Cloud Feedback Model Intercomparison Project Observation Simulator Package (COSP) has been implemented. A case study has been carried out to understand the effects of the modifications, where the modified modeling system is applied over the European domain with a horizontal resolution of 0.25° × 0.25°. To reduce the complexity in aerosol–cloud interactions, only warm-phase clouds are considered. We found that the online-coupled aerosol introduces significant changes for some cloud microphysical properties. The cloud effective radius shows an increase of 9.5 %, and the cloud droplet number concentration is reduced by 21.5 %.http://www.geosci-model-dev.net/10/2231/2017/gmd-10-2231-2017.pdf |
| spellingShingle | S. Dipu J. Quaas R. Wolke J. Stoll A. Mühlbauer O. Sourdeval M. Salzmann B. Heinold I. Tegen Implementation of aerosol–cloud interactions in the regional atmosphere–aerosol model COSMO-MUSCAT(5.0) and evaluation using satellite data Geoscientific Model Development |
| title | Implementation of aerosol–cloud interactions in the regional atmosphere–aerosol model COSMO-MUSCAT(5.0) and evaluation using satellite data |
| title_full | Implementation of aerosol–cloud interactions in the regional atmosphere–aerosol model COSMO-MUSCAT(5.0) and evaluation using satellite data |
| title_fullStr | Implementation of aerosol–cloud interactions in the regional atmosphere–aerosol model COSMO-MUSCAT(5.0) and evaluation using satellite data |
| title_full_unstemmed | Implementation of aerosol–cloud interactions in the regional atmosphere–aerosol model COSMO-MUSCAT(5.0) and evaluation using satellite data |
| title_short | Implementation of aerosol–cloud interactions in the regional atmosphere–aerosol model COSMO-MUSCAT(5.0) and evaluation using satellite data |
| title_sort | implementation of aerosol cloud interactions in the regional atmosphere aerosol model cosmo muscat 5 0 and evaluation using satellite data |
| url | http://www.geosci-model-dev.net/10/2231/2017/gmd-10-2231-2017.pdf |
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