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Wildfires in eastern Texas in August and September 2000: Emissions, aircraft measurements, and impact on photochemistry [An article from: Atmospheric Environment]
Book Details
PublisherElsevier
ISBN / ASINB000RR7VOY
ISBN-13978B000RR7VO1
AvailabilityAvailable for download now
Sales Rank99,999,999
MarketplaceUnited States 🇺🇸
Description
This digital document is a journal article from Atmospheric Environment, published by Elsevier in . The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
The accuracy of wildfire air pollutant emission estimates was assessed by comparing observations of carbon monoxide (CO) and particulate matter (PM) concentrations in wildfire plumes to predictions of CO and PM concentrations, based on emission estimates and air quality models. The comparisons were done for observations made in southeast Texas in August and September of 2000. The fire emissions were estimated from acreage burned, fuel loading information, and fuel emission factor models. A total of 389km^2 (96,100acres) burned in wildfires in the domain encompassing the Houston/Galveston-Beaumont/Port Arthur (HGBPA) area during August and September 2000. On the days of highest wildfire activity, the fires resulted in an estimated 3700tons of CO emissions, 250tons of volatile organic carbon (VOC) emissions, 340tons of PM"2"."5, and 50tons of NO"x emissions; estimated CO and VOC emissions from the fires exceeded light duty gasoline vehicle emissions in the Houston area on those days. When the appropriate aircraft data were available, aloft measurements of CO in the fire plumes were compared to concentrations of CO predicted using the emission estimates. Concentrations estimated based on emission predictions and air quality models were within a factor of 2 of the observed values. The estimated emissions from fires were used, together with a gridded photochemical model, to characterize the extent of dispersion of the fire emissions and the photochemistry associated with the fire emissions. Although the dispersion and photochemical impacts varied from fire to fire, for wildfires less than 10,000acres, the greatest enhancements of CO and ozone concentrations due to the fire emissions were generally confined to regions within 10-100km of the fire. Within 10km of these fires, CO concentrations can exceed 2ppm and ozone concentrations can be enhanced by 60ppb. The extent of photo-oxidant formation in the plumes was limited by NO"x availability and isoprene emissions from forested areas downwind of the fires provided most of the hydrocarbon reactivity in the plumes.
Description:
The accuracy of wildfire air pollutant emission estimates was assessed by comparing observations of carbon monoxide (CO) and particulate matter (PM) concentrations in wildfire plumes to predictions of CO and PM concentrations, based on emission estimates and air quality models. The comparisons were done for observations made in southeast Texas in August and September of 2000. The fire emissions were estimated from acreage burned, fuel loading information, and fuel emission factor models. A total of 389km^2 (96,100acres) burned in wildfires in the domain encompassing the Houston/Galveston-Beaumont/Port Arthur (HGBPA) area during August and September 2000. On the days of highest wildfire activity, the fires resulted in an estimated 3700tons of CO emissions, 250tons of volatile organic carbon (VOC) emissions, 340tons of PM"2"."5, and 50tons of NO"x emissions; estimated CO and VOC emissions from the fires exceeded light duty gasoline vehicle emissions in the Houston area on those days. When the appropriate aircraft data were available, aloft measurements of CO in the fire plumes were compared to concentrations of CO predicted using the emission estimates. Concentrations estimated based on emission predictions and air quality models were within a factor of 2 of the observed values. The estimated emissions from fires were used, together with a gridded photochemical model, to characterize the extent of dispersion of the fire emissions and the photochemistry associated with the fire emissions. Although the dispersion and photochemical impacts varied from fire to fire, for wildfires less than 10,000acres, the greatest enhancements of CO and ozone concentrations due to the fire emissions were generally confined to regions within 10-100km of the fire. Within 10km of these fires, CO concentrations can exceed 2ppm and ozone concentrations can be enhanced by 60ppb. The extent of photo-oxidant formation in the plumes was limited by NO"x availability and isoprene emissions from forested areas downwind of the fires provided most of the hydrocarbon reactivity in the plumes.
