Inclusion of biomass burning in WRF-Chem: impact of wildfires on weather forecasts
A plume rise algorithm for wildfires was included in WRF-Chem, and applied to look at the impact of intense wildfires during the 2004 Alaska wildfire season on weather simulations using model resolutions of 10 km and 2 km. Biomass burning emissions were estimated using a biomass burning emissions mo...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2011-06-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | http://www.atmos-chem-phys.net/11/5289/2011/acp-11-5289-2011.pdf |
| _version_ | 1828230164983578624 |
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| author | G. Grell S. R. Freitas M. Stuefer J. Fast |
| author_facet | G. Grell S. R. Freitas M. Stuefer J. Fast |
| author_sort | G. Grell |
| collection | DOAJ |
| description | A plume rise algorithm for wildfires was included in WRF-Chem, and applied to look at the impact of intense wildfires during the 2004 Alaska wildfire season on weather simulations using model resolutions of 10 km and 2 km. Biomass burning emissions were estimated using a biomass burning emissions model. In addition, a 1-D, time-dependent cloud model was used online in WRF-Chem to estimate injection heights as well as the vertical distribution of the emission rates. It was shown that with the inclusion of the intense wildfires of the 2004 fire season in the model simulations, the interaction of the aerosols with the atmospheric radiation led to significant modifications of vertical profiles of temperature and moisture in cloud-free areas. On the other hand, when clouds were present, the high concentrations of fine aerosol (PM<sub>2.5</sub>) and the resulting large numbers of Cloud Condensation Nuclei (CCN) had a strong impact on clouds and cloud microphysics, with decreased precipitation coverage and precipitation amounts during the first 12 h of the integration. During the afternoon, storms were of convective nature and appeared significantly stronger, probably as a result of both the interaction of aerosols with radiation (through an increase in CAPE) as well as the interaction with cloud microphysics. |
| first_indexed | 2024-04-12T18:44:13Z |
| format | Article |
| id | doaj.art-5bf30a45250e412393a2a5d63b2298a3 |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-04-12T18:44:13Z |
| publishDate | 2011-06-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-5bf30a45250e412393a2a5d63b2298a32022-12-22T03:20:39ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242011-06-0111115289530310.5194/acp-11-5289-2011Inclusion of biomass burning in WRF-Chem: impact of wildfires on weather forecastsG. GrellS. R. FreitasM. StueferJ. FastA plume rise algorithm for wildfires was included in WRF-Chem, and applied to look at the impact of intense wildfires during the 2004 Alaska wildfire season on weather simulations using model resolutions of 10 km and 2 km. Biomass burning emissions were estimated using a biomass burning emissions model. In addition, a 1-D, time-dependent cloud model was used online in WRF-Chem to estimate injection heights as well as the vertical distribution of the emission rates. It was shown that with the inclusion of the intense wildfires of the 2004 fire season in the model simulations, the interaction of the aerosols with the atmospheric radiation led to significant modifications of vertical profiles of temperature and moisture in cloud-free areas. On the other hand, when clouds were present, the high concentrations of fine aerosol (PM<sub>2.5</sub>) and the resulting large numbers of Cloud Condensation Nuclei (CCN) had a strong impact on clouds and cloud microphysics, with decreased precipitation coverage and precipitation amounts during the first 12 h of the integration. During the afternoon, storms were of convective nature and appeared significantly stronger, probably as a result of both the interaction of aerosols with radiation (through an increase in CAPE) as well as the interaction with cloud microphysics.http://www.atmos-chem-phys.net/11/5289/2011/acp-11-5289-2011.pdf |
| spellingShingle | G. Grell S. R. Freitas M. Stuefer J. Fast Inclusion of biomass burning in WRF-Chem: impact of wildfires on weather forecasts Atmospheric Chemistry and Physics |
| title | Inclusion of biomass burning in WRF-Chem: impact of wildfires on weather forecasts |
| title_full | Inclusion of biomass burning in WRF-Chem: impact of wildfires on weather forecasts |
| title_fullStr | Inclusion of biomass burning in WRF-Chem: impact of wildfires on weather forecasts |
| title_full_unstemmed | Inclusion of biomass burning in WRF-Chem: impact of wildfires on weather forecasts |
| title_short | Inclusion of biomass burning in WRF-Chem: impact of wildfires on weather forecasts |
| title_sort | inclusion of biomass burning in wrf chem impact of wildfires on weather forecasts |
| url | http://www.atmos-chem-phys.net/11/5289/2011/acp-11-5289-2011.pdf |
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