Importance of different parameterization changes for the updated dust cycle modeling in the Community Atmosphere Model (version 6.1)
<p>The Community Atmosphere Model (CAM6.1), the atmospheric component of the Community Earth System Model (CESM; version 2.1), simulates the life cycle (emission, transport, and deposition) of mineral dust and its interactions with physio-chemical components to quantify the impacts of dust on...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2022-11-01
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| Series: | Geoscientific Model Development |
| Online Access: | https://gmd.copernicus.org/articles/15/8181/2022/gmd-15-8181-2022.pdf |
| _version_ | 1811313292498436096 |
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| author | L. Li N. M. Mahowald J. F. Kok X. Liu M. Wu D. M. Leung D. S. Hamilton L. K. Emmons Y. Huang Y. Huang Y. Huang N. Sexton J. Meng J. Wan |
| author_facet | L. Li N. M. Mahowald J. F. Kok X. Liu M. Wu D. M. Leung D. S. Hamilton L. K. Emmons Y. Huang Y. Huang Y. Huang N. Sexton J. Meng J. Wan |
| author_sort | L. Li |
| collection | DOAJ |
| description | <p>The Community Atmosphere Model (CAM6.1), the atmospheric component
of the Community Earth System Model (CESM; version 2.1), simulates the
life cycle (emission, transport, and deposition) of mineral dust and its
interactions with physio-chemical components to quantify the impacts of dust
on climate and the Earth system. The accuracy of such quantifications relies
on how well dust-related processes are represented in the model. Here we
update the parameterizations for the dust module, including those on the
dust emission scheme, the aerosol dry deposition scheme, the size
distribution of transported dust, and the treatment of dust particle shape.
Multiple simulations were undertaken to evaluate the model performance
against diverse observations, and to understand how each update alters the
modeled dust cycle and the simulated dust direct radiative effect. The
model–observation comparisons suggest that substantially improved model
representations of the dust cycle are achieved primarily through the new
more physically-based dust emission scheme. In comparison, the other
modifications induced small changes to the modeled dust cycle and
model–observation comparisons, except the size distribution of dust in the
coarse mode, which can be even more influential than that of replacing the
dust emission scheme. We highlight which changes introduced here are
important for which regions, shedding light on further dust model
developments required for more accurately estimating interactions between
dust and climate.</p> |
| first_indexed | 2024-04-13T10:52:11Z |
| format | Article |
| id | doaj.art-46615d9d5f284ff0bf5d580ca06cd805 |
| institution | Directory Open Access Journal |
| issn | 1991-959X 1991-9603 |
| language | English |
| last_indexed | 2024-04-13T10:52:11Z |
| publishDate | 2022-11-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Geoscientific Model Development |
| spelling | doaj.art-46615d9d5f284ff0bf5d580ca06cd8052022-12-22T02:49:38ZengCopernicus PublicationsGeoscientific Model Development1991-959X1991-96032022-11-01158181821910.5194/gmd-15-8181-2022Importance of different parameterization changes for the updated dust cycle modeling in the Community Atmosphere Model (version 6.1)L. Li0N. M. Mahowald1J. F. Kok2X. Liu3M. Wu4D. M. Leung5D. S. Hamilton6L. K. Emmons7Y. Huang8Y. Huang9Y. Huang10N. Sexton11J. Meng12J. Wan13Department of Earth and Atmospheric Sciences, Cornell University, Ithaca, NY, United States Department of Earth and Atmospheric Sciences, Cornell University, Ithaca, NY, United States Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, United StatesDepartment of Atmospheric Sciences, Texas A&M University, College Station, TX, United StatesAtmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA, United StatesDepartment of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, United StatesDepartment of Earth and Atmospheric Sciences, Cornell University, Ithaca, NY, United States Atmospheric Chemistry Observations and Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, United StatesDepartment of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, United StatesEarth Institute, Columbia University, New York, NY 10025, United StatesNASA Goddard Institute for Space Studies, New York, NY 10025, United StatesDepartment of Earth and Atmospheric Sciences, Cornell University, Ithaca, NY, United States Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, United StatesScripps Institution of Oceanography, University of California San Diego, La Jolla, CA, United States<p>The Community Atmosphere Model (CAM6.1), the atmospheric component of the Community Earth System Model (CESM; version 2.1), simulates the life cycle (emission, transport, and deposition) of mineral dust and its interactions with physio-chemical components to quantify the impacts of dust on climate and the Earth system. The accuracy of such quantifications relies on how well dust-related processes are represented in the model. Here we update the parameterizations for the dust module, including those on the dust emission scheme, the aerosol dry deposition scheme, the size distribution of transported dust, and the treatment of dust particle shape. Multiple simulations were undertaken to evaluate the model performance against diverse observations, and to understand how each update alters the modeled dust cycle and the simulated dust direct radiative effect. The model–observation comparisons suggest that substantially improved model representations of the dust cycle are achieved primarily through the new more physically-based dust emission scheme. In comparison, the other modifications induced small changes to the modeled dust cycle and model–observation comparisons, except the size distribution of dust in the coarse mode, which can be even more influential than that of replacing the dust emission scheme. We highlight which changes introduced here are important for which regions, shedding light on further dust model developments required for more accurately estimating interactions between dust and climate.</p>https://gmd.copernicus.org/articles/15/8181/2022/gmd-15-8181-2022.pdf |
| spellingShingle | L. Li N. M. Mahowald J. F. Kok X. Liu M. Wu D. M. Leung D. S. Hamilton L. K. Emmons Y. Huang Y. Huang Y. Huang N. Sexton J. Meng J. Wan Importance of different parameterization changes for the updated dust cycle modeling in the Community Atmosphere Model (version 6.1) Geoscientific Model Development |
| title | Importance of different parameterization changes for the updated dust cycle modeling in the Community Atmosphere Model (version 6.1) |
| title_full | Importance of different parameterization changes for the updated dust cycle modeling in the Community Atmosphere Model (version 6.1) |
| title_fullStr | Importance of different parameterization changes for the updated dust cycle modeling in the Community Atmosphere Model (version 6.1) |
| title_full_unstemmed | Importance of different parameterization changes for the updated dust cycle modeling in the Community Atmosphere Model (version 6.1) |
| title_short | Importance of different parameterization changes for the updated dust cycle modeling in the Community Atmosphere Model (version 6.1) |
| title_sort | importance of different parameterization changes for the updated dust cycle modeling in the community atmosphere model version 6 1 |
| url | https://gmd.copernicus.org/articles/15/8181/2022/gmd-15-8181-2022.pdf |
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