Biomass burning organic aerosol from prescribed burning and other activities in the United States

Theodoritsi, Georgia N.; Posner, Laura N.; Robinson, Allen L.; Yarwood, Greg; Koo, Bonyoung; Morris, Ralph; Mavko, Matthew; Moore, Tom; Pandis, Spyros Ν.

doi:10.1016/j.atmosenv.2020.117753

Cited by 6 publications

(13 citation statements)

References 28 publications

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“…Transport during the MT season showed similarly distinct composition profiles depending on air mass origin. Air from EA exhibited higher concentrations of SO 2− 4 , O 3 , CH 4 , and NH + 4 , owing to urban emissions in continental outflow (Chuang et al, 2014;Talbot et al, 1997;Thornton et al, 1999;Umezawa et al, 2014;Wang et al, 2007) and extensive secondary aerosol formation (Hatakeyama et al, , 2004(Hatakeyama et al, , 2011Krupa and Manning, 1988;Matsui et al, 2014). In contrast, WP air is characterized as pure marine due to Figure 7.…”

Section: Chemical Composition Of Transported Air Massesmentioning

confidence: 99%

Measurement report: Long-range transport patterns into the tropical northwest Pacific during the CAMP2Ex aircraft campaign: chemical composition, size distributions, and the impact of convection

et al. 2021

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Abstract. The tropical Northwest Pacific (TNWP) is a receptor for pollution sources throughout Asia and is highly susceptible to climate change, making it imperative to understand long-range transport in this complex aerosol-meteorological environment. Measurements from the NASA Cloud, Aerosol, and Monsoon Processes Philippines Experiment (CAMP2Ex; 24 August to 5 October 2019) and back trajectories from the National Oceanic and Atmospheric Administration Hybrid Single Particle Lagrangian Integrated Trajectory Model (HYSPLIT) were used to examine transport into the TNWP from the Maritime Continent (MC), peninsular Southeast Asia (PSEA), East Asia (EA), and the West Pacific (WP). A mid-campaign monsoon shift on 20 September 2019 led to distinct transport patterns between the southwest monsoon (SWM; before 20 September) and monsoon transition (MT; after 20 September). During the SWM, long-range transport was a function of southwesterly winds and cyclones over the South China Sea. Low- (high-) altitude air generally came from MC (PSEA), implying distinct aerosol processing related to convection and perhaps wind shear. The MT saw transport from EA and WP, driven by Pacific northeasterly winds, continental anticyclones, and cyclones over the East China Sea. Composition of transported air differed by emission source and accumulated precipitation along trajectories (APT). MC air was characterized by biomass burning tracers while major components of EA air pointed to Asian outflow and secondary formation. Convective scavenging of PSEA air was evidenced by considerable vertical differences between aerosol species but not trace gases, as well as notably higher APT and smaller particles than other regions. Finally, we observed a possible wet scavenging mechanism acting on MC air aloft that was not strictly linked to precipitation. These results are important for understanding the transport and processing of air masses with further implications for modeling aerosol lifecycles and guiding international policymaking to public health and climate, particularly during the SWM and MT.

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Section: Chemical Composition Of Transported Air Massesmentioning

confidence: 99%

Measurement report: Long-range transport patterns into the tropical northwest Pacific during the CAMP2Ex aircraft campaign: chemical composition, size distributions, and the impact of convection

et al. 2021

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“…Air from PSEA had much lower species concentrations than MC (Table 2) due to decreased emissions and increased potential for wet scavenging. Sampled MC air showed statistically significant differences between BL and FT concentrations for both gas and aerosol species (Table S2), indicative of emissions constrained to the BL, and exhibited strong biomass burning signals in its composition profile (e.g., N100-1000nm, CO, NO3 -, OA, and BC) (Maudlin 360 et al, 2015;Pósfai et al, 2003;Reid et al, 1998Reid et al, , 2005Theodoritsi et al, 2020;Yadav et al, 2017). We note that peaks of CO ( Fig.…”

mentioning

confidence: 88%

“…As an indicator of aerosol hygroscopicity (Kreidenweis and Asa-Awuku, 2014;Malm et al, 2005;Svenningsson et 405 al., 2006), the ΔOA/ΔSO4 2ratio pointed to higher hygroscopicity in EA air than MC air (Cheung et al, 2020;Saxena et al, 1995;Wang et al, 2017Wang et al, , 2018Wang et al, , 2019. Interestingly, though peat burning in the MC has been associated with SO4 2- (Ikegami et al, 2001;, the elevated ΔOA/ΔSO4 2ratio in MC air (4.85 ± 0.24) is indicative of lower hygroscopicity, explainable by the high levels of OA emitted during biomass burning (Radzi bin Abas et al, 2004;Theodoritsi et al, 2020) or produced through gas-to-particle conversion during transport (Cappa et al, 2020;410 Mardi et al, 2018;Zhou et al, 2012). The lower ΔOA/ΔSO4 2ratio of EA air (0.75 ± 0.09) signaling high hygroscopicity is attributable to the high levels of SO2 in EA (Fig.…”

mentioning

confidence: 99%

Long-range transport patterns into the tropical northwest Pacific during the CAMP2Ex aircraft campaign: chemical composition, size distributions, and the impact of convection

Hilario¹,

Crosbie²,

Shook³

et al. 2020

Preprint

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Abstract. The tropical Western North Pacific (TWNP) is a receptor for pollution sources throughout Asia and is highly susceptible to climate change, making it imperative to understand long-range transport in this complex aerosol-meteorological environment. Measurements from the NASA Cloud, Aerosol, and Monsoon Processes Philippines Experiment (CAMP2Ex; 24 Aug to 5 Oct 2019) and back trajectories from the National Oceanic and Atmospheric Administration Hybrid Single Particle Lagrangian Integrated Trajectory Model (HYSPLIT) were used to examine transport into the TWNP from the Maritime Continent (MC), Peninsular Southeast Asia (PSEA), East Asia (EA), and West Pacific (WP). A mid-campaign monsoon shift on 20 Sep 2019 led to distinct transport patterns between the southwest monsoon (before 20 Sep) and monsoon transition (after 20 Sep). During the southwest monsoon, long-range transport was a function of southwesterly winds and cyclones over the South China Sea. Low (high) altitude air generally came from MC (PSEA), implying distinct aerosol processing related to convection and perhaps wind shear. The monsoon transition saw transport from EA and WP, driven by Pacific northeasterly winds, continental anticyclones, and cyclones over the East China Sea. Composition of transported air differed by emission source and accumulated precipitation along trajectories (APT) as an indicator of convection. MC air was characterized by biomass burning tracers while major components of EA air pointed to Asian outflow and secondary formation. Convective scavenging of PSEA air was evidenced by considerable vertical differences between aerosol species but not trace gases, as well as notably higher APT and smaller particles than other regions. Finally, we observed a possible wet scavenging mechanism acting on MC air aloft that was not strictly linked to precipitation. These results are important for understanding the transport and processing of air masses with further implications for modeling aerosol lifecycles and guiding international policymaking on public health and climate.

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“…This source contributes around 75 % of global combustion POA (Bond et al, 2004). In this work, the term biomass burning includes wildfires in forests and other areas; prescribed burning, which is a small wildfire set intentionally (Tian et al, 2008;Chiodi et al, 2018) in order to decrease the likelihood of major wildfires; agricultural waste burning; and residential burning.…”

Section: Introductionmentioning

confidence: 99%

“…The aim of the current study is to implement the alternative VBS scheme proposed by Ciarelli et al (2017a, b) in the PMCAMx-SR (Source Resolved) model during different periods. These periods have already been investigated by Theodoritsi et al (2020b) using the default PMCAMx-SR scheme. That study concluded that during spring the PMCAMx-SR performance is good according to the criteria proposed by Morris et al (2005), but the model tends to underpredict the observed OA in the PM 2.5 size range.…”

Section: Introductionmentioning

confidence: 99%

Simulation of the evolution of biomass burning organic aerosol with different volatility basis set schemes in PMCAMx-SRv1.0

2021

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Abstract. A source-resolved three-dimensional chemical transport model, PMCAMx-SR (Particulate Matter Comprehensive Air-quality Model with extensions – Source Resolved), was applied in the continental US to investigate the contribution of the various components (primary and secondary) of biomass burning organic aerosol (bbOA) to organic aerosol levels. Two different schemes based on the volatility basis set were used for the simulation of the bbOA during different seasons. The first is the default scheme of PMCAMx-SR, and the second is a recently developed scheme based on laboratory experiments of the bbOA evolution. The simulations with the alternative bbOA scheme predict much higher total bbOA concentrations when compared with the base case ones. This is mainly due to the high emissions of intermediate-volatility organic compounds (IVOCs) assumed in the alternative scheme. The oxidation of these compounds is predicted to be a significant source of secondary organic aerosol. The impact of the other parameters that differ in the two schemes is low to negligible. The monthly average maximum predicted concentrations of the alternative bbOA scheme were approximately an order of magnitude higher than those of the default scheme during all seasons. The performance of the two schemes was evaluated against observed total organic aerosol concentrations from several measurement sites across the US. The results were different for the different seasons examined. The default scheme performed better during July and September, while the alternative scheme performed a little better during April. These results illustrate the uncertainty of the corresponding predictions and the need to quantify the emissions and reactions of IVOCs from specific biomass sources and to better constrain the total (primary and secondary) bbOA levels.

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Biomass burning organic aerosol from prescribed burning and other activities in the United States

Cited by 6 publications

References 28 publications

Measurement report: Long-range transport patterns into the tropical northwest Pacific during the CAMP<sup>2</sup>Ex aircraft campaign: chemical composition, size distributions, and the impact of convection

Measurement report: Long-range transport patterns into the tropical northwest Pacific during the CAMP<sup>2</sup>Ex aircraft campaign: chemical composition, size distributions, and the impact of convection

Long-range transport patterns into the tropical northwest Pacific during the CAMP<sup>2</sup>Ex aircraft campaign: chemical composition, size distributions, and the impact of convection

Simulation of the evolution of biomass burning organic aerosol with different volatility basis set schemes in PMCAMx-SRv1.0

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Biomass burning organic aerosol from prescribed burning and other activities in the United States

Cited by 6 publications

References 28 publications

Measurement report: Long-range transport patterns into the tropical northwest Pacific during the CAMP&lt;sup&gt;2&lt;/sup&gt;Ex aircraft campaign: chemical composition, size distributions, and the impact of convection

Measurement report: Long-range transport patterns into the tropical northwest Pacific during the CAMP&lt;sup&gt;2&lt;/sup&gt;Ex aircraft campaign: chemical composition, size distributions, and the impact of convection

Long-range transport patterns into the tropical northwest Pacific during the CAMP&lt;sup&gt;2&lt;/sup&gt;Ex aircraft campaign: chemical composition, size distributions, and the impact of convection

Simulation of the evolution of biomass burning organic aerosol with different volatility basis set schemes in PMCAMx-SRv1.0

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Measurement report: Long-range transport patterns into the tropical northwest Pacific during the CAMP<sup>2</sup>Ex aircraft campaign: chemical composition, size distributions, and the impact of convection

Measurement report: Long-range transport patterns into the tropical northwest Pacific during the CAMP<sup>2</sup>Ex aircraft campaign: chemical composition, size distributions, and the impact of convection

Long-range transport patterns into the tropical northwest Pacific during the CAMP<sup>2</sup>Ex aircraft campaign: chemical composition, size distributions, and the impact of convection