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The optical, chemical, and physical ...

Colorado State University.

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The optical, chemical, and physical properties of aerosols and gases emitted by the laboratory combustion of wildland fuels.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	The optical, chemical, and physical properties of aerosols and gases emitted by the laboratory combustion of wildland fuels./
作者:	McMeeking, Gavin R.
面頁冊數:	298 p.
附註:	Source: Dissertation Abstracts International, Volume: 70-02, Section: B, page: 0896.
Contained By:	Dissertation Abstracts International70-02B.
標題:	Atmospheric Sciences. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3346483
ISBN:	9781109013443

The optical, chemical, and physical properties of aerosols and gases emitted by the laboratory combustion of wildland fuels.
McMeeking, Gavin R.

The optical, chemical, and physical properties of aerosols and gases emitted by the laboratory combustion of wildland fuels. - 298 p.

Source: Dissertation Abstracts International, Volume: 70-02, Section: B, page: 0896.

Thesis (Ph.D.)--Colorado State University, 2008.

Biomass burning is a major source of trace gases and particles that have a profound impact on the atmosphere. Trace gases emitted by fires include the greenhouse gases CO2 and CH4, as well as CO and volatile organic compounds that affect air quality. Particle emissions affect climate, visibility, the hydrologic cycle, and human health. This work presents measurements of trace gas and aerosol emissions from a series of controlled laboratory burns for various plant species common to North America. Over 30 fuels were tested through &sim;250 individual burns during the Fire Laboratory at Missoula Experiment.

ISBN: 9781109013443Subjects--Topical Terms:

1019179
Atmospheric Sciences.

The optical, chemical, and physical properties of aerosols and gases emitted by the laboratory combustion of wildland fuels.
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245 1 4 $a The optical, chemical, and physical properties of aerosols and gases emitted by the laboratory combustion of wildland fuels.
300 $a 298 p.
500 $a Source: Dissertation Abstracts International, Volume: 70-02, Section: B, page: 0896.
502 $a Thesis (Ph.D.)--Colorado State University, 2008.
520 $a Biomass burning is a major source of trace gases and particles that have a profound impact on the atmosphere. Trace gases emitted by fires include the greenhouse gases CO2 and CH4, as well as CO and volatile organic compounds that affect air quality. Particle emissions affect climate, visibility, the hydrologic cycle, and human health. This work presents measurements of trace gas and aerosol emissions from a series of controlled laboratory burns for various plant species common to North America. Over 30 fuels were tested through &sim;250 individual burns during the Fire Laboratory at Missoula Experiment.
520 $a Emission factors are presented as a function of modified combustion efficiency (MCE), a measure of the fire combustion conditions. The emissions of many trace gas and aerosol species depended strongly on MCE: smoldering-phase combustion dominated fires (low MCE) emitted roughly four times as much gas-phase hydrocarbon species and organic aerosols than flaming-phase dominated fires (high MCE). Inorganic aerosol emissions depended more strongly on plant species and components than on MCE.
520 $a Flaming-phase dominated fires tended to produce aerosol with high mass fractions of strongly light-absorbing elemental carbon. Smoldering-phase fires produced aerosol with large mass fractions of more weakly light absorbing organic carbon, but this material was found to have a strong wavelength dependence of absorption, greater than the inverse wavelength relationship typically assumed for light absorbing aerosol.
520 $a A two component model---featuring elemental carbon with a weak wavelength dependence but high mass-normalized absorption efficiency and organic carbon with a strong wavelength dependence but low mass-normalized absorption efficiency---is shown to represent the bulk absorption spectra of biomass burning aerosol. The results show that at wavelengths below &sim;450 nm, organic carbon light absorption could rival that of elemental carbon for aerosol dominated by organic carbon. If ignored, the light absorption by organic carbon can cause errors in predicted surface ultraviolet and visible radiation fluxes and photochemical photolysis rates in regions affected by biomass burning emissions. The dependence of spectral aerosol optical properties on combustion conditions means that fire behavior must be accurately assessed and predicted to ensure accurate emissions inventories and estimates of biomass burning atmospheric impacts.
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