Time-resolved chemical characterization of aerosol particles down to 6 nm diameter in Stockton, California

2013 ◽  
Author(s):  
Arantza Eiguren-Fernandez ◽  
Gregory Lewis ◽  
Steven Spielman ◽  
Susanne Hering
Keyword(s):  
Aerosol Particles ◽  
Chemical Characterization ◽  
Time Resolved

A condensation-growth and impaction method for rapid off-line chemical-characterization of organic submicrometer atmospheric aerosol particles

2003 ◽  
Vol 34 (2) ◽  
pp. 225-242 ◽  
Author(s):  
Berko Sierau ◽  
Frank Stratmann ◽  
Matthias Pelzing ◽  
Christian Neusüß ◽  
Diana Hofmann ◽  
...  
Keyword(s):  
Atmospheric Aerosol ◽  
Aerosol Particles ◽  
Chemical Characterization ◽  
Atmospheric Aerosol Particles ◽  
Condensation Growth

scholarly journals Measurement report: Effects of photochemical aging on the formation and evolution of summertime secondary aerosol in Beijing

2020 ◽  
Author(s):  
Tianzeng Chen ◽  
Jun Liu ◽  
Qingxin Ma ◽  
Biwu Chu ◽  
Peng Zhang ◽  
...  
Keyword(s):  
Chemical Characterization ◽  
Exposure Dose ◽  
Time Resolved ◽  
Increase Rate ◽  
Key Factor ◽  
Formation And Evolution ◽  
Photochemical Aging ◽  
Observation Period

Abstract. Atmospheric submicron aerosols have a great effect on air quality and human health, while their formation and evolution processes are still not fully understood. Herein, the crucial role of atmospheric oxidation capacity, as characterized by OH exposure dose in the formation and evolution of secondary submicron aerosols, was systematically investigated based on a highly time-resolved chemical characterization of PM1 in a southern suburb of Beijing in summertime from 25th July to 21st August 2019. The averaged concentration of PM1 was 19.3 ± 11.3 μg m−3, and nearly half (48.3 %) of the mass was organic aerosols (OA) during the observation period. The equivalent photochemical age (ta) estimated from the ratios of toluene to benzene was applied to characterize the OH exposure dose of the air mass. The relationships of NR–PM1 species, OA factors (i.e., one hydrocarbon-like (HOA) and three oxygenated (LO-OOA, SV-OOA and MO-OOA) organic aerosol factors) and elemental compositions (e.g., H / C, O / C, N / C, S / C, OM / OC, and OSc) to ta were analyzed in detail. It was found that higher PM1 concentration accompanied longer ta, with an average increase rate of 0.8 μg m−3 per hour. Meanwhile, the formation of SO42− and MO-OOA were most sensitive to the increase in ta, and their contributions to PM1 were enhanced from 19 % to 27 % and from 27 % to 48 %, respectively, as ta increased from 9.4 h to 19.6 h. In addition, OSc and the ratios of O / C and OM / OC increased with the increase in ta. These results indicated that photochemical aging is a key factor leading to the evolution of OA and the increase of PM1 in summertime.

scholarly journals Measurement report: Effects of photochemical aging on the formation and evolution of summertime secondary aerosol in Beijing

2021 ◽  
Vol 21 (2) ◽  
pp. 1341-1356
Author(s):  
Tianzeng Chen ◽  
Jun Liu ◽  
Qingxin Ma ◽  
Biwu Chu ◽  
Peng Zhang ◽  
...  
Keyword(s):  
Chemical Characterization ◽  
Exposure Dose ◽  
Time Resolved ◽  
Increase Rate ◽  
Key Factor ◽  
Formation And Evolution ◽  
Photochemical Aging ◽  
Observation Period

Abstract. Atmospheric submicrometer aerosols have a great effect on air quality and human health, while their formation and evolution processes are still not fully understood. Herein, the crucial role of atmospheric oxidation capacity, as characterized by OH exposure dose in the formation and evolution of secondary submicrometer aerosols, was systematically investigated based on a highly time-resolved chemical characterization of PM1 in a southern suburb of Beijing in summertime from 25 July to 21 August 2019. The averaged concentration of PM1 was 19.3 ± 11.3 µg m−3, and nearly half (48.3 %) of the mass was organic aerosols (OAs) during the observation period. The equivalent photochemical age (ta) estimated from the ratios of toluene to benzene was applied to characterize the OH exposure dose of the air mass, in which an observation period with the similar sources and minimal influence of fresh emission was adopted. The relationships of non-refractory PM1 species, OA factors (i.e., one hydrocarbon-like and three oxygenated organic aerosol factors) and elemental compositions (e.g., H∕C, O∕C, N∕C, S∕C, OM∕OC, and OSc) to ta were analyzed in detail. It was found that higher PM1 concentration accompanied longer ta, with an average increase rate of 0.8 µgm-3h-1. Meanwhile, the formation of sulfate and more oxidized oxygenated OA were most sensitive to the increase in ta, and their contributions to PM1 were enhanced from 22 % to 28 % and from 29 % to 48 %, respectively, as ta increased. In addition, OSc and the ratios of O∕C and OM∕OC increased with the increase in ta. These results indicated that photochemical aging is a key factor leading to the evolution of OA and the increase in PM1 in summertime.

scholarly journals Chemical Characterization of Aerosol Particles Using On-Chip Photonic Cavity Enhanced Spectroscopy

ACS Sensors ◽  
2019 ◽  
Vol 4 (3) ◽  
pp. 571-577 ◽  
Author(s):  
Robin Singh ◽  
Danhao Ma ◽  
Lionel Kimerling ◽  
Anuradha Murthy Agarwal ◽  
Brian W. Anthony
Keyword(s):  
Aerosol Particles ◽  
Chemical Characterization ◽  
On Chip

Chemical characterization of sub-micrometer aerosol particles in the tropical Atlantic Ocean: marine and biomass burning influences

2015 ◽  
Vol 72 (2) ◽  
pp. 105-125 ◽  
Author(s):  
Manuela van Pinxteren ◽  
Björn Fiedler ◽  
Dominik van Pinxteren ◽  
Yoshiteru Iinuma ◽  
Arne Körtzinger ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
Biomass Burning ◽  
Aerosol Particles ◽  
Chemical Characterization ◽  
Tropical Atlantic ◽  
Tropical Atlantic Ocean

scholarly journals Highly time resolved chemical characterization of submicron organic aerosols at a polluted urban location

2016 ◽  
Vol 18 (10) ◽  
pp. 1285-1296 ◽  
Author(s):  
Bharath Kumar ◽  
Abhishek Chakraborty ◽  
S. N. Tripathi ◽  
Deepika Bhattu
Keyword(s):  
Real Time ◽  
Black Carbon ◽  
Organic Aerosols ◽  
Chemical Characterization ◽  
Winter Period ◽  
Late Winter ◽  
Time Resolved ◽  
Urban Location

Real time concentrations of non-refractory submicron (NR-PM1) aerosols and Black Carbon (BC) were measured during the late winter period (February–March) in a polluted urban location (Kanpur) of India.

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