WRF-Chem simulation of aerosol seasonal variability in the San Joaquin Valley
WRF-Chem simulations of aerosol seasonal variability in the San Joaquin Valley (SJV), California, are evaluated by satellite and in situ observations. Results show that the WRF-Chem model successfully captures the distribution and magnitude of and variation in SJV aerosols during the cold season...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2017-06-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | http://www.atmos-chem-phys.net/17/7291/2017/acp-17-7291-2017.pdf |
| _version_ | 1828416508989014016 |
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| author | L. Wu H. Su O. V. Kalashnikova J. H. Jiang C. Zhao M. J. Garay J. R. Campbell N. Yu |
| author_facet | L. Wu H. Su O. V. Kalashnikova J. H. Jiang C. Zhao M. J. Garay J. R. Campbell N. Yu |
| author_sort | L. Wu |
| collection | DOAJ |
| description | WRF-Chem simulations of aerosol seasonal variability in the San Joaquin
Valley (SJV), California, are evaluated by satellite and in situ
observations. Results show that the WRF-Chem model successfully captures the
distribution and magnitude of and variation in SJV aerosols during the cold
season. However, aerosols are not well represented in the warm season.
Aerosol simulations in urban areas during the cold season are sensitive to
model horizontal resolution, with better simulations at 4 km resolution than
at 20 km resolution, mainly due to inhomogeneous distribution of
anthropogenic emissions and precipitation that is represented better in the 4 km
simulation. In rural areas, the model sensitivity to grid size is rather
small. Our observational analysis reveals that dust is a primary contributor
to aerosols in the SJV, especially during the warm season. Aerosol
simulations in the warm season are sensitive to the parameterization of dust
emission in WRF-Chem. The GOCART (Goddard Global Ozone Chemistry Aerosol
Radiation and Transport) dust scheme produces very little dust in the SJV,
while the DUSTRAN (DUST TRANsport model) scheme overestimates dust emission.
Vertical mixing of aerosols is not adequately represented in the model based
on CALIPSO (Cloud-Aerosol Lidar and Infrared pathfinder Satellite
Observation) aerosol extinction profiles. Improved representation of dust
emission and vertical mixing in the boundary layer is needed for better
simulations of aerosols during the warm season in the SJV.</p> |
| first_indexed | 2024-12-10T14:04:35Z |
| format | Article |
| id | doaj.art-99b5107a211f4774b31e7e9e2f26b889 |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-12-10T14:04:35Z |
| publishDate | 2017-06-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-99b5107a211f4774b31e7e9e2f26b8892022-12-22T01:45:43ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242017-06-01177291730910.5194/acp-17-7291-2017WRF-Chem simulation of aerosol seasonal variability in the San Joaquin ValleyL. Wu0H. Su1O. V. Kalashnikova2J. H. Jiang3C. Zhao4M. J. Garay5J. R. Campbell6N. Yu7Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USAJet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USAJet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USAJet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USASchool of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui, ChinaJet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USANaval Research Laboratory, Monterey, CA, USAUniversity of California, Riverside, Riverside, CA, USAWRF-Chem simulations of aerosol seasonal variability in the San Joaquin Valley (SJV), California, are evaluated by satellite and in situ observations. Results show that the WRF-Chem model successfully captures the distribution and magnitude of and variation in SJV aerosols during the cold season. However, aerosols are not well represented in the warm season. Aerosol simulations in urban areas during the cold season are sensitive to model horizontal resolution, with better simulations at 4 km resolution than at 20 km resolution, mainly due to inhomogeneous distribution of anthropogenic emissions and precipitation that is represented better in the 4 km simulation. In rural areas, the model sensitivity to grid size is rather small. Our observational analysis reveals that dust is a primary contributor to aerosols in the SJV, especially during the warm season. Aerosol simulations in the warm season are sensitive to the parameterization of dust emission in WRF-Chem. The GOCART (Goddard Global Ozone Chemistry Aerosol Radiation and Transport) dust scheme produces very little dust in the SJV, while the DUSTRAN (DUST TRANsport model) scheme overestimates dust emission. Vertical mixing of aerosols is not adequately represented in the model based on CALIPSO (Cloud-Aerosol Lidar and Infrared pathfinder Satellite Observation) aerosol extinction profiles. Improved representation of dust emission and vertical mixing in the boundary layer is needed for better simulations of aerosols during the warm season in the SJV.</p>http://www.atmos-chem-phys.net/17/7291/2017/acp-17-7291-2017.pdf |
| spellingShingle | L. Wu H. Su O. V. Kalashnikova J. H. Jiang C. Zhao M. J. Garay J. R. Campbell N. Yu WRF-Chem simulation of aerosol seasonal variability in the San Joaquin Valley Atmospheric Chemistry and Physics |
| title | WRF-Chem simulation of aerosol seasonal variability in the San Joaquin Valley |
| title_full | WRF-Chem simulation of aerosol seasonal variability in the San Joaquin Valley |
| title_fullStr | WRF-Chem simulation of aerosol seasonal variability in the San Joaquin Valley |
| title_full_unstemmed | WRF-Chem simulation of aerosol seasonal variability in the San Joaquin Valley |
| title_short | WRF-Chem simulation of aerosol seasonal variability in the San Joaquin Valley |
| title_sort | wrf chem simulation of aerosol seasonal variability in the san joaquin valley |
| url | http://www.atmos-chem-phys.net/17/7291/2017/acp-17-7291-2017.pdf |
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