Aerosol formation and yields
Secondary organic aerosol (SOA) formation from monoterpene ozonolysis in the presence of inorganic aerosols : acid effects on SOA yields
... ambient aerosol load, with the goal of improving human ...describe aerosol formation is that it excludes formation of SOA mass from other processes, which may cause underestimations, as well ...
134
Chamber studies of secondary organic aerosol formation
... on aerosol formation is explored in a series of alkene ozonolysis experiments, including α-pinene and 6 cycloalkenes of various carbon numbers and ...The aerosol yields from α-pinene ...
31
Investigations of Secondary Organic Aerosol Formation in Laboratory Chambers
... 2.1 Abstract Laboratory chambers used to study atmospheric chemistry and aerosol formation are subject to wall loss of vapors and particles that must be accounted for in calculating aerosol ...
183
Chamber Studies and Modeling of Secondary Organic Aerosol Formation
... organic aerosol (SOA) constitutes a significant fraction of total atmospheric particulate loading, but there is evidence that SOA yields based on laboratory studies may underestimate at- mospheric ...SOA ...
386
Parameterising secondary organic aerosol from α-pinene using a detailed oxidation and aerosol formation model
... SOA yields at equilibrium, when the production of con- densable products is balanced by losses due to deposition and photochemical degradation, after typically two ...
24
MALTE model to predict new aerosol formation in the lower troposphere
... Currently there is a considerable lack of knowledge concerning the atmospheric oxidation of complex organic molecules such as monoterpenes. The identities of the end- products, their reaction yields and their ...
19
Modeling secondary organic aerosol formation from biogenic hydrocarbons
... m echanistic approaches for m odeling SO A have em erged in the literature and are considered to be the future direction o f m ore realistic SOA m odeling (G riffin e t al., 2005; K anakidou et al., 2005; Johnson et ...
148
Reactive intermediates revealed in secondary organic aerosol formation from isoprene
... oxidation of SO 2 , SOA mass yields from isoprene under high- and low- NO x conditions, respectively, increase substantially. Because isoprene is estimated to be the largest single contributor to global SOA, these ...
6
Formation of secondary organic aerosol due to terpenoid ozonolysis in ventilated settings
... organic aerosol formation from terpenoid ozonolysis with varying yields in indoor environments Abstract The ozonolysis of terpenoids generates secondary organic aerosol (SOA) ...SOA ...
254
Aerosol size distribution and radiative forcing response to anthropogenically driven historical changes in biogenic secondary organic aerosol formation
... -dependent yields might improve model representation; however, maximum NO x concentrations in GEOS-Chem-TOMAS are approxi- mately an order of magnitude lower than the concentrations used in the chamber study by ...
22
Characterization of aerosol photooxidation flow reactors: heterogeneous oxidation, secondary organic aerosol formation and cloud condensation nuclei activity measurements
... Oxidation rate, oligomerization reactions, UV lamp inten- sity/wavelength, and/or wall effects may have influenced SOA yield. Faster gas-phase oxidation relative to nucleation could explain lower yields in the ...
17
Investigation of Fundamental Processes Governing Secondary Organic Aerosol Formation in Laboratory Chambers
... Organic Aerosol Growth The predicted (FGOM) temporal profiles of organic aerosol mass (C OA ), together with the wall-loss-corrected chamber data, for the four C 12 alkane systems based on the optimal fit ...
303
Secondary organic aerosol formation from hydroxyl radical oxidation and ozonolysis of monoterpenes
... × 10 −6 s −1 was observed over a period of 14 h and no equi- librium was observed. It was not possible to detect rapid ini- tial losses of pinonaldehyde in the SAPHIR chamber due to the chamber setup and injection ...
22
Secondary organic aerosol formation from biomass burning intermediates: phenol and methoxyphenols
... organic aerosol (SOA) yields (ratio of mass of SOA formed to mass of primary organic reacted) greater than 25 % are ...observed. Aerosol growth is rapid and linear with the pri- mary organic ...
25
Formation of secondary organic aerosol from isoprene oxidation over Europe
... acetal formation, on particles were sug- gested to be involved in the formation of low-volatile organic products from aldehydes (Jang and Kamens, 2001; Jang et ...that yields of SOA from the ...
28
Terpene Composition Complexity Controls Secondary Organic Aerosol Yields from Scots Pine Volatile Emissions
... organic aerosol (SOA) impact climate by scattering and absorbing radiation and contributing to cloud ...SOA formation from a mixture of real Scots pine (Pinus sylvestris) emissions including a variety of ...
13
Experimental studies on nucleation and atmospheric aerosol particle formation down to the molecular level
... The aerosol sample is led into the expansion chamber and the expansion chamber subsequently sealed ...all aerosol particles in the expansion chamber are activated by heterogeneous nucleation of n-propanol ...
65
Chemistry of Secondary Organic Aerosol Formation
... understand aerosol chemistry, and it served as motivation in my successful research proposal for a National Science Foundation Graduate Research Fellowship that supported me while at ...
250
Aerosol formation and heterogeneous chemistry in the atmosphere
... Phase transfer from the gas-phase into the condensed phase are generally described by three distinct processes : nucleation, condensation and coagulation (Figure 11). Nucleation is the first step leading to SOA ...
21
Impact of Aerosol-Cloud Cycling on Aqueous Secondary Organic Aerosol Formation
... SOA formation rates in Simulation 1 for aerosol pH 1 – 4 and cloud pH 3 – ...SOA formation rate in cloudwater in the second half of the simulation with the pH of the aerosol in the first half ...
21