Sulfur Dioxide Transported From the Residual Layer Drives Atmospheric Nucleation During Haze Periods in Beijing DOI Creative Commons
Yonghong Wang,

Yongjing Ma,

Chao Yan

et al.

Geophysical Research Letters, Journal Year: 2023, Volume and Issue: 50(6)

Published: March 14, 2023

Abstract New particle formation (NPF) is a global phenomenon that significantly influences climate. NPF also contributes to haze, with pronounced negative impacts on human health. Theory and observations both show nucleation favored during clean days inhibited haze episodes due high pre‐existing condensation sink (CS). Here we the surprising occurrence of in Beijing associated concentration sulfuric acid dimers. With field model simulations, demonstrate downward mixing sulfur dioxide (SO 2 ) from residual layer aloft enhances ground level SO , which turn elevates dimer after rapid oxidation polluted air. Our results address key gap between source its atmospheric products conditions megacity, Beijing, providing missing link complete chain describing atmosphere.

Language: Английский

An indicator for sulfuric acid–amine nucleation in atmospheric environments DOI
Runlong Cai, Chao Yan, Douglas R. Worsnop

et al.

Aerosol Science and Technology, Journal Year: 2021, Volume and Issue: 55(9), P. 1059 - 1069

Published: May 2, 2021

New particle formation (NPF) occurs frequently in various atmospheric environments and it is a major source of ultrafine particles. This study proposes an indicator, I, for the occurrence NPF atmosphere based on mechanism H2SO4–amine nucleation. It characterizes synergistic effects governing factors nucleation, including H2SO4 concentration, amine concentrations, stability clusters, aerosol surface area concentration. Long-term measurements urban Beijing were used to validate this indicator. Good consistency was found between indicator NPF. usually observed with I > 1 typical conditions Beijing. The derivation expressions also indicate good positive association dimer concentration NPF, as verified by measurements. shown be applicable Shanghai.Copyright © 2021 American Association Aerosol Research

Language: Английский

Citations

52
Influence of organic aerosol molecular composition on particle absorptive properties in autumn Beijing DOI Creative Commons
Jing Cai, Cheng Wu, Jiandong Wang

et al.

Atmospheric chemistry and physics, Journal Year: 2022, Volume and Issue: 22(2), P. 1251 - 1269

Published: Jan. 25, 2022

Abstract. Organic aerosol (OA) is a major component of fine particulate matter (PM), affecting air quality, human health, and the climate. The absorptive reflective behavior OA components contributes to determining particle optical properties thus their effects on radiative budget troposphere. There limited knowledge influence molecular composition in polluted urban environment. In this study, we characterized oxygenated collected filter samples autumn 2018 Beijing, China, with inlet for gases aerosols coupled high-resolution time-of-flight chemical ionization mass spectrometer (FIGAERO–CIMS). Three haze episodes occurred during our sampling period daily maximum concentrations 50, 30, 55 µg m−3. We found that signal intensities dicarboxylic acids sulfur-containing compounds increased two more intense episodes, while relative contributions wood-burning markers other aromatic were enhanced cleaner periods. further assessed by combining detailed measurements collocated light absorption measurements. show enhancement (Eabs) black carbon (BC) was mostly related (e.g., acids), likely formed aqueous-phase reactions periods higher humidity, speculate they might contribute lensing effects. Aromatics nitro-aromatics nitrocatechol its derivatives) high coefficient (babs) consistent light-absorbing (brown) (BrC). Our results provide information at level associated BrC BC can serve as basis studies anthropogenic forcing

Language: Английский

Citations

33
Observation and Source Apportionment of Atmospheric Alkaline Gases in Urban Beijing DOI

Shengnan Zhu,

Chao Yan, Jun Zheng

et al.

Environmental Science & Technology, Journal Year: 2022, Volume and Issue: 56(24), P. 17545 - 17555

Published: Nov. 28, 2022

Alkaline gases, including NH3, C1–3-amines, C1–3-amides, and C1–3-imines, were measured in situ using a water cluster-CIMS urban Beijing during the wintertime of 2018, with campaign average 2.8 ± 2.0 ppbv, 5.2 4.3, 101.1 94.5, 5.4 pptv, respectively. Source apportionment analysis constrained by emission profiles in-use motor vehicles was performed SoFi-PMF software package, five sources identified as gasoline-powered (GV), diesel-powered (DV), septic system (SS), soil (SE), combustion-related (CS). SS dominant NH3 source (60.0%), followed DV (18.6%), SE (13.1%), CS (4.3%), GV (4.0%). responsible for 69.9 85.2% C1- C2-amines emissions, Most C3-amines emitted from nonmotor vehicular (SS = 61.3%; 17.8%; 9.1%). accounted 71.9 34.1% C2-amides mainly comprised amides imines, likely originating pyrolysis nitrogen-containing compounds. Our results suggested that vehicle exhausts can not only contribute to criteria air pollutants but also promote new particle formation, which has been well recognized considered current regulations. Urban residential predominant contributor background NH3. Enhanced emissions major cause PM2.5 buildup haze events. Combustion-related sources, together vehicles, most observed imines may be public health concern within vicinity these sources.

Language: Английский

Citations

33
The striking effect of vertical mixing in the planetary boundary layer on new particle formation in the Yangtze River Delta DOI Creative Commons
Shiyi Lai,

Shangfei Hai,

Yang Gao

et al.

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 829, P. 154607 - 154607

Published: March 17, 2022

Language: Английский

Citations

32
Large contributions of anthropogenic sources to amines in fine particles at a coastal area in northern China in winter DOI
Zhiyi Liu, Min Li, Xinfeng Wang

et al.

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 839, P. 156281 - 156281

Published: May 27, 2022

Language: Английский

Citations

31
Estimation of sulfuric acid concentration using ambient ion composition and concentration data obtained with atmospheric pressure interface time-of-flight ion mass spectrometer DOI Creative Commons
Lisa Beck, Siegfried Schobesberger, Mikko Sipilä

et al.

Atmospheric measurement techniques, Journal Year: 2022, Volume and Issue: 15(6), P. 1957 - 1965

Published: March 31, 2022

Abstract. Sulfuric acid (H2SO4, SA) is the key compound in atmospheric new particle formation. Therefore, it crucial to observe its concentration with sensitive instrumentation, such as chemical ionisation (CI) inlets coupled pressure interface time-of-flight (APi-TOF) mass spectrometers. However, there are environmental conditions for which and physical reasons why cannot be used, example certain remote places or during flight measurements limitations regarding chemicals. Here, we propose a theoretical method estimate SA based on ambient ion composition that achieved by APi-TOF alone. We derive expression validate accurate CI-APi-TOF observations. Our validation shows developed works well daytime boreal forest (R2=0.85); however, underestimates in, e.g. Antarctic atmosphere formation events where dominating pathway nucleation involves sulfuric base (R2=0.48).

Language: Английский

Citations

30
Atmospheric nanoparticle growth DOI
Dominik Stolzenburg, Runlong Cai, Sara M. Blichner

et al.

Reviews of Modern Physics, Journal Year: 2023, Volume and Issue: 95(4)

Published: Nov. 9, 2023

Atmospheric nanoparticles can serve as nuclei for cloud droplets, thereby inducing significant but uncertain effects on the radiative forcing of climate system. This article focuses physicochemical processes that govern growth these particles from formation molecular clusters until reach sizes where they act condensation nuclei. The review describes latest developments in measurement and modeling connects domains to large-scale simulations such Earth system models. authors recommend closer coordination among laboratory studies, atmospheric measurements, understand importance

Language: Английский

Citations

22
Role of Methanesulfonic Acid in Sulfuric Acid–Amine and Ammonia New Particle Formation DOI Creative Commons
Jack S. Johnson, Coty N. Jen

ACS Earth and Space Chemistry, Journal Year: 2023, Volume and Issue: 7(3), P. 653 - 660

Published: March 7, 2023

Aerosol nucleation accounts for over half of all seed particles cloud droplet formation. In the atmosphere, sulfuric acid (SA) nucleates with ammonia, amines, oxidized organics, and many more compounds to form particles. Studies have also shown that methanesulfonic (MSA) independently amines ammonia. MSA SA are produced simultaneously via dimethyl sulfide oxidation in marine atmosphere. However, limited knowledge exists on how nucleate together presence various atmospherically relevant base compounds, which is critical predicting rates accurately. This work provides experimental evidence react SA-MSA-base has different reaction pathways than SA-base nucleation. Specifically, formation SA-MSA heterodimer creates energetically favorable SA-MSA-methylamine an enhancement rates. SA-trimethylamine suppressed by MSA, likely due steric hindrance trimethylamine. These results display importance including reactions between SA, predict particle

Language: Английский

Citations

19
Road Traffic Emissions Lead to Much Enhanced New Particle Formation through Increased Growth Rates DOI Creative Commons
James Brean, Alex Rowell, David C. S. Beddows

et al.

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(24), P. 10664 - 10674

Published: June 8, 2024

New particle formation (NPF) is a major source of atmospheric aerosol particles, including cloud condensation nuclei (CCN), by number globally. Previous research has highlighted that NPF less frequent but more intense at roadsides compared to urban background. Here, we closely examine both background and roadside sites in Central Europe. We show the concentration oxygenated organic molecules (OOMs) greater roadside, OOMs along with sulfuric acid onto new particles sufficient explain growth sites. identify hitherto unreported traffic-related OOM contributing 29% 16% total background, respectively. Critically, this undiscovered an essential component NPF. Without their contribution rates subsequent enhancements survival, >50 nm produced would be reduced factor 21 site. Reductions hydrocarbon emissions from road traffic may thereby reduce numbers CCN counts.

Language: Английский

Citations

7
Rapid sulfuric acid–dimethylamine nucleation enhanced by nitric acid in polluted regions DOI Open Access
Ling Liu, Fangqun Yu, Lin Du

et al.

Proceedings of the National Academy of Sciences, Journal Year: 2021, Volume and Issue: 118(35)

Published: Aug. 27, 2021

Recent research [Wang et al., Nature 581, 184-189 (2020)] indicates nitric acid (NA) can participate in sulfuric (SA)-ammonia (NH3) nucleation the clean and cold upper free troposphere, whereas NA exhibits no obvious effects at boundary layer with relatively high temperatures. Herein, considering that an SA-dimethylamine (DMA) mechanism was detected megacities [Yao Science 361, 278-281 (2018)], roles of SA-DMA are investigated. Different from SA-NH3 nucleation, we found enhance SA-DMA-based particle formation rates polluted atmospheric layer, such as Beijing winter, enhancement up to 80-fold. Moreover, promote number concentrations clusters (up 27-fold) contribute 76% cluster pathways 280 K. The enhancements on by critical for particulate pollution DMA concentrations.

Language: Английский

Citations

40