Estimates of Future New Particle Formation under Different Emission Scenarios in Beijing DOI Creative Commons
James Brean, Alex Rowell, David C. S. Beddows

et al.

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(12), P. 4741 - 4750

Published: March 17, 2023

New particle formation (NPF) is a leading source of particulate matter by number and contributor to mass during haze events. Reductions in emissions air pollutants, many which are NPF precursors, expected the move toward carbon neutrality or net-zero. Expected changes pollutant used investigate future processes, comparison simulation current conditions. The projected SO2 key changing number, with different scenarios producing either doubling near total reduction sulfuric acid-amine rates. Particle growth rates change little all but strictest emission control scenarios. These will reduce arising substantially, thus showing further cobenefit net-zero policies. Major uncertainties remain including volatility oxygenated organic molecules resulting from NOx amine emissions.

Language: Английский

The Synergistic Role of Sulfuric Acid, Bases, and Oxidized Organics Governing New‐Particle Formation in Beijing DOI Creative Commons
Chao Yan, Rujing Yin, Yiqun Lu

et al.

Geophysical Research Letters, Journal Year: 2021, Volume and Issue: 48(7)

Published: March 22, 2021

Abstract Intense and frequent new particle formation (NPF) events have been observed in polluted urban environments, yet the dominant mechanisms are still under debate. To understand key species governing processes of NPF we conducted comprehensive measurements downtown Beijing during January–March, 2018. We performed detailed analyses on sulfuric acid cluster composition budget, as well chemical physical properties oxidized organic molecules (OOMs). Our results demonstrate that fast clustering (H 2 SO 4 ) base triggered events, OOMs further helped grow newly formed particles toward climate‐ health‐relevant sizes. This synergistic role H , species, is likely representative environments where abundant usually co‐exist, with moderately low volatility when produced high NO x concentrations.

Language: Английский

Citations

150
Sulfuric acid–amine nucleation in urban Beijing DOI Creative Commons
Runlong Cai, Chao Yan, Dongsen Yang

et al.

Atmospheric chemistry and physics, Journal Year: 2021, Volume and Issue: 21(4), P. 2457 - 2468

Published: Feb. 18, 2021

Abstract. New particle formation (NPF) is one of the major sources atmospheric ultrafine particles. Due to high aerosol and trace gas concentrations, mechanism governing factors for NPF in polluted boundary layer may be quite different from those clean environments, which however less understood. Herein, based on long-term measurements January 2018 March 2019 Beijing, nucleation influences H2SO4 concentration, amine concentration are quantified. The collision H2SO4–amine clusters found dominating initialize urban Beijing. coagulation scavenging due a factor as it limits new rates. Beijing sometimes limited by low concentrations. Summarizing synergistic effects we elucidate various conditions.

Language: Английский

Citations

146
Quiet New Particle Formation in the Atmosphere DOI Creative Commons
Markku Kulmala, Heikki Junninen, Lubna Dada

et al.

Frontiers in Environmental Science, Journal Year: 2022, Volume and Issue: 10

Published: June 30, 2022

Atmospheric new particle formation (NPF) has been observed to take place in practice all around the world. In continental locations, typically about 10–40% of days are so-called NPF event characterized by a clear and growth that continue for several hours, occurring mostly during daytime. The other either non-event days, or which it is difficult decide whether had occurred not. Using measurement data from locations (Hyytiälä, Järvselja, near-city background city center Budapest), we were able show tends occur also on traditionally as days. One explanation instrument sensitivity towards low number concentrations sub-10 nm range, usually limits our capability detect such events. We found rates at 6 2–20% those traditional Growth newly formed particles very similar between This previously overlooked phenomenon, termed quiet NPF, contributes significantly production secondary atmosphere.

Language: Английский

Citations

60
The missing base molecules in atmospheric acid–base nucleation DOI Creative Commons
Runlong Cai, Rujing Yin, Chao Yan

et al.

National Science Review, Journal Year: 2022, Volume and Issue: 9(10)

Published: July 25, 2022

Transformation of low-volatility gaseous precursors to new particles affects aerosol number concentration, cloud formation and hence the climate. The clustering acid base molecules is a major mechanism driving fast nucleation initial growth in atmosphere. However, acid-base cluster composition, measured using state-of-the-art mass spectrometers, cannot explain high rate particles. Here we present strong evidence for existence such as amines smallest atmospheric sulfuric clusters prior their detection by spectrometers. We demonstrate that forming (H2SO4)1(amine)1 rate-limiting step H2SO4-amine uptake pathway H2SO4 clusters. proposed very consistent with particle urban Beijing, which dimethylamine key while other bases ammonia may contribute larger Our findings further underline fact amines, even at low concentrations when undetected clusters, can be crucial planetary boundary layer.

Language: Английский

Citations

46
Dynamics of nanocluster aerosol in the indoor atmosphere during gas cooking DOI Creative Commons
Satya S. Patra, Jinglin Jiang, Xiaosu Ding

et al.

PNAS Nexus, Journal Year: 2024, Volume and Issue: 3(2)

Published: Feb. 1, 2024

Nanocluster aerosol (NCA: particles in the size range of 1-3 nm) are a critically important, yet understudied, class atmospheric particles. NCA efficiently deposit human respiratory system and can translocate to vital organs. Due their high surface area-to-mass ratios, associated with heightened propensity for bioactivity toxicity. Despite health relevance NCA, little is known regarding prevalence indoor environments where people spend majority time. In this study, we quantify formation transformation down 1 nm via high-resolution online nanoparticle measurements during propane gas cooking residential building. We observed substantial pool sub-1.5 atmosphere periods, number concentrations often dominated by newly formed NCA. Indoor emission factors reach up ∼10

Language: Английский

Citations

12
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
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
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
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
Application of smog chambers in atmospheric process studies DOI Creative Commons
Biwu Chu, Tianzeng Chen, Yongchun Liu

et al.

National Science Review, Journal Year: 2021, Volume and Issue: 9(2)

Published: June 13, 2021

Smog chamber experimental systems, which have been widely used in laboratory simulation for studying atmospheric processes, are comprehensively reviewed this paper. The components, development history, main research topics and achievements of smog chambers introduced. Typical the world, including their volumes, wall materials, light sources features, summarized compared. Key factors influences on environment discussed, loss, emission background pollutants. features next-generation application prospect future studies also outlined

Language: Английский

Citations

35