The sensitivity of CO and aerosol transport to the temporal and vertical distribution of North American boreal fire emissions
Forest fires in Alaska and western Canada represent important sources of aerosols and trace gases in North America. Among the largest uncertainties when modeling forest fire effects are the timing and injection height of biomass burning emissions. Here we simulate CO and aerosols over North America...
Published in: | Atmospheric Chemistry and Physics |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2009
|
Subjects: | |
Online Access: | https://doi.org/10.5194/acp-9-6559-2009 https://doaj.org/article/0b504443309f49eb8188b09a1ce7cff3 |
id |
ftdoajarticles:oai:doaj.org/article:0b504443309f49eb8188b09a1ce7cff3 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:0b504443309f49eb8188b09a1ce7cff3 2023-05-15T16:35:31+02:00 The sensitivity of CO and aerosol transport to the temporal and vertical distribution of North American boreal fire emissions Y. Chen Q. Li J. T. Randerson E. A. Lyons R. A. Kahn D. L. Nelson D. J. Diner 2009-09-01T00:00:00Z https://doi.org/10.5194/acp-9-6559-2009 https://doaj.org/article/0b504443309f49eb8188b09a1ce7cff3 EN eng Copernicus Publications http://www.atmos-chem-phys.net/9/6559/2009/acp-9-6559-2009.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 doi:10.5194/acp-9-6559-2009 https://doaj.org/article/0b504443309f49eb8188b09a1ce7cff3 Atmospheric Chemistry and Physics, Vol 9, Iss 17, Pp 6559-6580 (2009) Physics QC1-999 Chemistry QD1-999 article 2009 ftdoajarticles https://doi.org/10.5194/acp-9-6559-2009 2022-12-31T05:13:53Z Forest fires in Alaska and western Canada represent important sources of aerosols and trace gases in North America. Among the largest uncertainties when modeling forest fire effects are the timing and injection height of biomass burning emissions. Here we simulate CO and aerosols over North America during the 2004 fire season, using the GEOS-Chem chemical transport model. We apply different temporal distributions and injection height profiles to the biomass burning emissions, and compare model results with satellite-, aircraft-, and ground-based measurements. We find that averaged over the fire season, the use of finer temporal resolved biomass burning emissions usually decreases CO and aerosol concentrations near the fire source region, and often enhances long-range transport. Among the individual temporal constraints, switching from monthly to 8-day time intervals for emissions has the largest effect on CO and aerosol distributions, and shows better agreement with measured day-to-day variability. Injection height substantially modifies the surface concentrations and vertical profiles of pollutants near the source region. Compared with CO, the simulation of black carbon aerosol is more sensitive to the temporal and injection height distribution of emissions. The use of MISR-derived injection heights improves agreement with surface aerosol measurements near the fire source. Our results indicate that the discrepancies between model simulations and MOPITT CO measurements near the Hudson Bay can not be attributed solely to the representation of injection height within the model. Frequent occurrence of strong convection in North America during summer tends to limit the influence of injection height parameterizations of fire emissions in Alaska and western Canada with respect to CO and aerosol distributions over eastern North America. Article in Journal/Newspaper Hudson Bay Alaska Directory of Open Access Journals: DOAJ Articles Hudson Bay Canada Hudson Atmospheric Chemistry and Physics 9 17 6559 6580 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
Physics QC1-999 Chemistry QD1-999 Y. Chen Q. Li J. T. Randerson E. A. Lyons R. A. Kahn D. L. Nelson D. J. Diner The sensitivity of CO and aerosol transport to the temporal and vertical distribution of North American boreal fire emissions |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
Forest fires in Alaska and western Canada represent important sources of aerosols and trace gases in North America. Among the largest uncertainties when modeling forest fire effects are the timing and injection height of biomass burning emissions. Here we simulate CO and aerosols over North America during the 2004 fire season, using the GEOS-Chem chemical transport model. We apply different temporal distributions and injection height profiles to the biomass burning emissions, and compare model results with satellite-, aircraft-, and ground-based measurements. We find that averaged over the fire season, the use of finer temporal resolved biomass burning emissions usually decreases CO and aerosol concentrations near the fire source region, and often enhances long-range transport. Among the individual temporal constraints, switching from monthly to 8-day time intervals for emissions has the largest effect on CO and aerosol distributions, and shows better agreement with measured day-to-day variability. Injection height substantially modifies the surface concentrations and vertical profiles of pollutants near the source region. Compared with CO, the simulation of black carbon aerosol is more sensitive to the temporal and injection height distribution of emissions. The use of MISR-derived injection heights improves agreement with surface aerosol measurements near the fire source. Our results indicate that the discrepancies between model simulations and MOPITT CO measurements near the Hudson Bay can not be attributed solely to the representation of injection height within the model. Frequent occurrence of strong convection in North America during summer tends to limit the influence of injection height parameterizations of fire emissions in Alaska and western Canada with respect to CO and aerosol distributions over eastern North America. |
format |
Article in Journal/Newspaper |
author |
Y. Chen Q. Li J. T. Randerson E. A. Lyons R. A. Kahn D. L. Nelson D. J. Diner |
author_facet |
Y. Chen Q. Li J. T. Randerson E. A. Lyons R. A. Kahn D. L. Nelson D. J. Diner |
author_sort |
Y. Chen |
title |
The sensitivity of CO and aerosol transport to the temporal and vertical distribution of North American boreal fire emissions |
title_short |
The sensitivity of CO and aerosol transport to the temporal and vertical distribution of North American boreal fire emissions |
title_full |
The sensitivity of CO and aerosol transport to the temporal and vertical distribution of North American boreal fire emissions |
title_fullStr |
The sensitivity of CO and aerosol transport to the temporal and vertical distribution of North American boreal fire emissions |
title_full_unstemmed |
The sensitivity of CO and aerosol transport to the temporal and vertical distribution of North American boreal fire emissions |
title_sort |
sensitivity of co and aerosol transport to the temporal and vertical distribution of north american boreal fire emissions |
publisher |
Copernicus Publications |
publishDate |
2009 |
url |
https://doi.org/10.5194/acp-9-6559-2009 https://doaj.org/article/0b504443309f49eb8188b09a1ce7cff3 |
geographic |
Hudson Bay Canada Hudson |
geographic_facet |
Hudson Bay Canada Hudson |
genre |
Hudson Bay Alaska |
genre_facet |
Hudson Bay Alaska |
op_source |
Atmospheric Chemistry and Physics, Vol 9, Iss 17, Pp 6559-6580 (2009) |
op_relation |
http://www.atmos-chem-phys.net/9/6559/2009/acp-9-6559-2009.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 doi:10.5194/acp-9-6559-2009 https://doaj.org/article/0b504443309f49eb8188b09a1ce7cff3 |
op_doi |
https://doi.org/10.5194/acp-9-6559-2009 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
9 |
container_issue |
17 |
container_start_page |
6559 |
op_container_end_page |
6580 |
_version_ |
1766025741226475520 |