Impact of biomass emissions on particle chemistry during the California Regional Particulate Air Quality Study

Qin, Xueying; Prather, Kimberly A.

doi:10.1016/j.ijms.2006.09.004

Cited by 53 publications

(53 citation statements)

References 75 publications

(91 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The ATOFMS spectra of cluster HMOC1 are shown in Qin and Prather (2006) have already reported these ATOFMS positive and negative mass spectra, where the presence of similar peaks were associated with HULIS species formed by fog processing. Moreover, similar particles were also seen in another ATOFMS study (Moffet et al, 2008).…”

Section: Aerosol Characterizationmentioning

confidence: 73%

“…Our results show instead a much finer particle size distribution for the HMOC particle type (<300 nm) than the droplet mode (1-2 µm in their case). We believe that the peaks associated with HMOC detected by Qin and Prather (2006) are indeed due to fog processing. However, the fact they are found in both the fine biomass particles (freshly emitted) and the coarser HMOC particle type (more fog processed) probably indicates that the meteorological situation was rather stagnant throughout their field study.…”

Section: Aerosol Characterizationmentioning

confidence: 89%

“…During a study conducted in the Fresno Valley (California), Qin and Prather (2006) reported biomass particles with distinct diurnal variations, peaking at night and reaching a minimum during the day. In addition to biomass particles, a very similar particle type to our HMOC type was also detected.…”

Section: Aerosol Characterizationmentioning

confidence: 99%

“…4b) were primarily supermicron sized particles (Da>1.0 µm) and had similar size distributions. From all the above evidence, Qin and Prather (2006) suggested that the HMOC particles mainly resulted from a combination of biomass combustion, gas/particle partitioning of semivolatile biomass precursors, followed by aqueous phase processing. However, they could not exclude the possibility that a small fraction of HMOC were HULIS directly emitted from biomass emissions, since HULIS has also been reported to be released from primary biomass emissions.…”

Section: Aerosol Characterizationmentioning

confidence: 99%

See 3 more Smart Citations

Real-time secondary aerosol formation during a fog event in London

et al. 2009

View full text Add to dashboard Cite

Abstract.A fog event was monitored with state-of-the art real-time aerosol mass spectrometers in an urban background location in London (England) during the REPARTEE-I experiment. Specific particle types rich in hydroxymethanesulphonate (HMS) were found only during the fog event. Formation of inorganic and organic secondary aerosol was observed as soon as fog was detected and two different mechanisms are suggested to be responsible for the production of two different types of aerosol. Nitrate aerosol is produced in the liquid phase within the droplet. Contrary to previous studies, the formation of HULIS was observed on interstitial particles rather than evaporated fog droplets, suggesting heterogeneous formation mechanisms depending on parameters other than the water content and not fully understood. Not only are secondary aerosol constituents produced during the fog event, but the primary aerosol is observed to be processed by the fog event, dramatically changing its chemical properties.

show abstract

Section: Aerosol Characterizationmentioning

confidence: 73%

Section: Aerosol Characterizationmentioning

confidence: 89%

Section: Aerosol Characterizationmentioning

confidence: 99%

Section: Aerosol Characterizationmentioning

confidence: 99%

See 2 more Smart Citations

Real-time secondary aerosol formation during a fog event in London

et al. 2009

View full text Add to dashboard Cite

show abstract

“…These aerosols have been detected in California in previous studies (e.g. Qin and Prather, 2006;Qin et al, 2012) and represent organic carbon particles, but are larger than 1 µm due to their water content, therefore they might have spectral properties similar to dust, i.e. they are large particles and absorb more radiation at shorter wavelengths (AAE > 1) which can fall in the Dust dominant or Dust/EC mixture types in the Ångström matrix.…”

Section: Discussionmentioning

confidence: 86%

Relating aerosol absorption due to soot, organic carbon, and dust to emission sources determined from in-situ chemical measurements

et al. 2013

View full text Add to dashboard Cite

Estimating the aerosol contribution to the global or regional radiative forcing can take advantage of the relationship between the spectral aerosol optical properties and the size and chemical composition of aerosol. Long term global optical measurements from observational networks or satellites can be used in such studies. Using in-situ chemical mixing state measurements can help us to constrain the limitations of such estimates.

In this study, the Absorption Ångström Exponent (AAE) and the Scattering Ångström Exponent (SAE) derived from 10 operational AERONET sites in California are combined for deducing chemical speciation based on wavelength dependence of the optical properties. In addition, in-situ optical properties and single particle chemical composition measured during three aircraft field campaigns in California between 2010 and 2011 are combined in order to validate the methodology used for the estimates of aerosol chemistry using spectral optical properties.

Results from this study indicate a dominance of mixed types in the classification leading to an underestimation of the primary sources, however secondary sources are better classified. The distinction between carbonaceous aerosols from fossil fuel and biomass burning origins is not clear, since their optical properties are similar. On the other hand, knowledge of the aerosol sources in California from chemical studies help to identify other misclassification such as the dust contribution

show abstract

The 2010 California Research at the Nexus of Air Quality and Climate Change (CalNex) field study

et al. 2013

View full text Add to dashboard Cite

The California Research at the Nexus of Air Quality and Climate Change (CalNex) field study was conducted throughout California in May, June, and July of 2010. The study was organized to address issues simultaneously relevant to atmospheric pollution and climate change, including (1) emission inventory assessment, (2) atmospheric transport and dispersion, (3) atmospheric chemical processing, and (4) cloud‐aerosol interactions and aerosol radiative effects. Measurements from networks of ground sites, a research ship, tall towers, balloon‐borne ozonesondes, multiple aircraft, and satellites provided in situ and remotely sensed data on trace pollutant and greenhouse gas concentrations, aerosol chemical composition and microphysical properties, cloud microphysics, and meteorological parameters. This overview report provides operational information for the variety of sites, platforms, and measurements, their joint deployment strategy, and summarizes findings that have resulted from the collaborative analyses of the CalNex field study. Climate‐relevant findings from CalNex include that leakage from natural gas infrastructure may account for the excess of observed methane over emission estimates in Los Angeles. Air‐quality relevant findings include the following: mobile fleet VOC significantly declines, and NOx emissions continue to have an impact on ozone in the Los Angeles basin; the relative contributions of diesel and gasoline emission to secondary organic aerosol are not fully understood; and nighttime NO3 chemistry contributes significantly to secondary organic aerosol mass in the San Joaquin Valley. Findings simultaneously relevant to climate and air quality include the following: marine vessel emissions changes due to fuel sulfur and speed controls result in a net warming effect but have substantial positive impacts on local air quality.

show abstract

Impact of biomass emissions on particle chemistry during the California Regional Particulate Air Quality Study

Cited by 53 publications

References 75 publications

Real-time secondary aerosol formation during a fog event in London

Real-time secondary aerosol formation during a fog event in London

Relating aerosol absorption due to soot, organic carbon, and dust to emission sources determined from in-situ chemical measurements

The 2010 California Research at the Nexus of Air Quality and Climate Change (CalNex) field study

Contact Info

Product

Resources

About