organic aerosols
Improved source apportionment of organic aerosols in complex urban air pollution using the multilinear engine (ME-2)
... lower CO + 2 fraction and O / C ratio (0.62) compared with the more oxidized OOA (MO-OOA), which had a higher CO + 2 fraction and O / C (0.91) ratio. The sum of LO-OOA and MO-OOA showed a high correlation with the sum of ...
12
Applications of Infrared Spectroscopy in Analysis of Organic Aerosols
... of aerosols and investigate compound concentrations as well as chemical processes involved in the formation of ...the organic aerosols, once well established, since the advantages of af- fordable ...
21
Modeling anthropogenically controlled secondary organic aerosols in a megacity: a simplified framework for global and climate models
... To remove the influence of background (long range trans- port) CO, it is common to consider 1CO as the measured CO minus the CO background. As CO and POA have similar or generally collocated emission sources, their ra- ...
17
Implementing marine organic aerosols into the GEOS-Chem model
... Natural aerosols also have an important climatic impact, as long-term changes in emis- sions and the feedbacks on meteorology can lead to a global mean radiative perturbation approaching 1 W m −2 (Carslaw et ...
11
Marine Organic Aerosols and Their Implication to Air Quality
... Marine organic aerosols appear to have two distinctly different sources and can be broadly classified as primary and ...marine organic aerosols of biogenic origin are emitted from the ocean by ...
109
Investigating Sources and Sinks of Organic Aerosols: NO₃ initiated Oxidation of Isoprene and Heterogeneous Oxidation of Organic Aerosol
... of organic aerosols (Hallquist et al., 2009). Although aerosols are complex mixtures of inorganic (primarily sulfate) and organic components (Murphy et ...the organic portion, which is ...
197
A modeling approach to evaluate the uncertainty in estimating the evaporation behaviour and volatility of organic aerosols
... Organic aerosols comprise a significant portion of atmo- spheric particular matter (Hallquist et ...secondary organic aerosol (SOA) contri- bution formed in the atmosphere from the gas phase oxida- ...
23
Marine Organic Aerosols and Their Implication to Climate.
... submicron organic aerosol surface concentrations of 100 ng m -3 , with values up to 400 ng m -3 over biologically productive ...insoluble organic matter (WIOM) with POA concentrations from the two emission ...
234
Sources and Secondary Production of Organic Aerosols in the Northeastern United States during WINTER
... few decades there have been a number of wintertime studies of aerosols in Asia (e.g., Cao et al., 2003; Kim et al., 2017; Rengarajan et al., 2007, 2011; Takegawa et al., 2005; Xu et al., 2016; Zhang et al., 2015) ...
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A Study on Photo-Oxidation Under High-Nox Conditions Forming Secondary Organic Aerosols From Isoprene
... The oxidation of isoprene (2-methyl-1,3-butadiene) is known to play a central role in the photochemistry of the troposphere, but is generally not considered to lead to the formation of secondary organic aerosol ...
7
Measurements of the HO2 uptake coefficients onto single component organic aerosols
... 40-42 40 Humic-like substances have also been identified as a major component of aerosols and have been 41 measured in different aerosol types including marine aerosols, dust from soil a[r] ...
21
Gender and respiratory findings in workers occupationally exposed to organic aerosols: A meta analysis of 12 cross-sectional studies
... The prevalence of occupational asthma among our stud- ied workers varied from 1.1% to 10.5% in female workers and from 1.2% to 7.4% in male workers. No significant differences in prevalence were elicited by odds ratio ...
16
Analysis of the chemical composition of atmospheric organic aerosols by mass spectrometry
... annually into the troposphere, leads to secondary organic aerosol (SOA). Our research community did not previously consider isoprene as a precursor for SOA formation owing to the known-volatility of its oxidation ...
530
Formation of Secondary Organic Aerosols by Germicidal Ultraviolet Light
... particulate matter (PM2.5) size range was measured, and significant levels of particle formation 17.. were observed for UV exposure periods of as short as 5 minutes.[r] ...
8
Hygroscopicity Frequency Distributions of Secondary Organic Aerosols.
... These results are surprising, since SOA formed from these reactions is composed of many compounds with a large variety of structures [Kroll and Seinfeld, 2008]. For example, the -pinene ozonolysis reaction yields many ...
172
Near-infrared laser desorption/ionization aerosol mass spectrometry for measuring organic aerosol at atmospherically relevant aerosol mass loadings
... of organic aerosols by a new analytical technique with direct applicability to atmospheric science, namely: near- infrared laser desorption/ionization aerosol mass spectrom- ...including organic ...
9
Accuracy and precision of 14 C-based source apportionment of organic and elemental carbon in aerosols using the Swiss_4S protocol
... Jimenez, J. L., Canagaratna, M. R., Donahue, N. M., Prevot, a S. H., Zhang, Q., Kroll, J. H., DeCarlo, P. F., Allan, J. D., Coe, H., Ng, N. L., Aiken, a C., Docherty, K. S., Ulbrich, I. M., Grieshop, a P., Robinson, a ...
15
Simulating the Impacts of Marine Organic Emissions on Global Atmospheric Chemistry and Aerosols Using an Online Coupled Meteorology and Chemistry Model
... primary organic aerosols (POA) on atmospheric chemistry, a unified model framework with online emissions, comprehensive treat- ment of gas-phase chemistry, and advanced aerosol microphysics is ...and ...
9
A method for extracting calibrated volatility information from the FIGAERO-HR-ToF-CIMS and its experimental application
... H., Zhang, Q., Kroll, J. H., DeCarlo, P. F., Allan, J. D., Coe, H., Ng, N. L., Aiken, A. C., Docherty, K. S., Ulbrich, I. M., Grieshop, A. P., Robinson, A. L., Duplissy, J., Smith, J. D., Wil- son, K. R., Lanz, V. A., ...
11
Kinetically controlled glass transition measurement of organic aerosol thin films using broadband dielectric spectroscopy
... Even though the issues listed above are likely to be the primary reasons leading to a ∼ 10 % difference in the glass transition temperature of citric acid between our results and the literature, the following factors may ...
12