Simulation Comparisons of Particulate Emissions from Fires under Marginal and Critical Conditions
| Autor: | Rodman R. Linn, Alexander J. Josephson, Daniel Castaño, Marlin Holmes |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Atmospheric Science
geography geography.geographical_feature_category 010504 meteorology & atmospheric sciences Moisture CFD Simulation Astrophysics::High Energy Astrophysical Phenomena 010501 environmental sciences Environmental Science (miscellaneous) Particulates Chaparral Atmospheric sciences Particulate Emissions 01 natural sciences Shrubland Atmosphere Soot Formation Environmental science Particle size Physics::Atmospheric and Oceanic Physics Critical condition 0105 earth and related environmental sciences Lofting |
| Zdroj: | Atmosphere Volume 10 Issue 11 |
| ISSN: | 2073-4433 |
| Popis: | Using a particulate emissions model developed for FIRETEC, we explore differences in particle emission profiles between high-intensity fires under critical conditions and low-intensity fires under marginal conditions. Simulations were performed in a chaparral shrubland and a coniferous pine forest representative of the southeast United States. In each case, simulations were carried out under marginal and critical fire conditions. Marginal fire conditions include high moisture levels and low winds, often desired for prescribed fires as these conditions produce a low-intensity burn with slower spread rates. Critical fire conditions include low moisture levels and high winds, which easily lead to uncontrollable wildfires which produce a high-intensity burn with faster spread rates. These simulations&rsquo resultant particle emission profiles show critical fire conditions generate larger particle emission factors, higher total mass emissions, and a higher lofting potential of particles into the atmosphere when compared against marginal fire conditions but similar particle size distrubtions. In addition, a sensitivity analysis of the emissions model was performed to evaluate key parameters which govern particle emission factor and particle size. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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