Analysis of Individual Atmospheric Particles DOI
Joseph M. Conny

Geophysical monograph, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 54

Published: Dec. 13, 2024

Investigations into atmospheric aerosols are key to understanding how chemical and physical processes within the atmosphere contribute climate change, affect public health, impact visibility. Determinations of particulate matter at microscopic, or single-particle, level offer distinct advantages over determinations in bulk form. These include composition with respect particle size, shape, mixing state along properties particles, particularly surface properties, as they formation lifetime clouds haze. This chapter is an overview various static techniques that allow detailed physicochemical interrogation single particles benefit these studies. A general description followed by their use studying particles. Included scanning transmission electron microscopies associated such X-ray spectroscopy, diffraction, energy loss spectroscopy; micro-Raman spectroscopy optical tweezers, surface-enhanced Raman, tip-enhanced Raman; atomic force microscopy; microscopy. Dynamic single-particle aerosol time-of-flight mass spectrometry, which can be appreciated only from analysis ensembles, briefly mentioned.

Language: Английский

Size-Resolved Elemental Composition of Respiratory Particles in Three Healthy Subjects DOI
Aaron J. Prussin, Zezhen Cheng, Weinan Leng

et al.

Environmental Science & Technology Letters, Journal Year: 2023, Volume and Issue: 10(4), P. 356 - 362

Published: March 24, 2023

The chemical composition of respiratory particles is interest because the viability any viruses and bacteria in has been shown to depend on this factor. Using computer controlled scanning electron microscopy/energy dispersive X-ray spectroscopy (CCSEM/EDX), we analyzed size-resolved greater than 35,000 individual collected from three healthy human subjects, quantitatively at nanometer-scale spatial resolution. desiccated ranged size 0.05 4.4 μm, mode distribution was approximately 0.1 μm. Particles were heterogeneous composition, with 42% them containing a carbon atomic percentage 95% 53% Na + P K Cl 5%. Based particles' elemental classified into five categories: 48%–56% total number carbonaceous, mostly organic; 40%–50% Na-rich salt; 0.3%–0.5% P-rich 0.1–0.8% K-rich 1%–2.5% mixed salt. ratio salt carbonaceous increased increasing particle size; larger 2 μm dominated by Size-dependent differences may have important implications for efficiency airborne transmission pathogens.

Language: Английский

Citations

12
Air pollution trapping in the Dresden Basin from gray-zone scale urban modeling DOI Creative Commons

Michael Weger,

Bernd Heinold

Atmospheric chemistry and physics, Journal Year: 2023, Volume and Issue: 23(21), P. 13769 - 13790

Published: Nov. 6, 2023

Abstract. The microscale variability of urban air pollution is essentially driven by the interaction between meteorology and topography, which remains challenging to represent spatially accurately computationally efficiently in dispersion models. Natural topography can additionally exert a considerable amplifying effect on background pollution, depending atmospheric stability. This requires an equally important representation models, as even subtle terrain-height variations enforce characteristic local flow regimes. In this model study, effects natural winds Dresden Basin Eastern German Elbe valley are investigated. A new, efficient used within multiscale quality modeling framework. simulations that consider real meteorological emission conditions focus two periods late winter early summer, respectively, well black carbon (BC), key pollutant mainly emitted from motorized traffic. As complement commonly mass concentrations, particle age content (age concentration) simulated. concept, was originally developed study hydrological reservoir flows Eulerian framework, adapted here for first time boundary-layer modeling. approach identify stagnant or recirculating orographic resulting trapping. An empirical orthogonal function (EOF) analysis applied simulation results attribute modes specific weather patterns quantify their significance. Air monitoring data region evaluation. show strong sensitivity conditions, but generally confirm increased BC levels due location. horizontal concentrations dominated traffic emissions, overlay potential orography-driven accumulations. Therefore, assessment impact usually inconclusive. However, using age-concentration metric, filters out direct effects, previously undetected spatial discovered largely modulated surface orography. comparison with assuming homogeneous emissions also proves robustness information contained distribution shows it be suitable metric assessing indicates several hotspots southwestern slopes southern side valley, Döhlen Basin, prevailing wind direction.

Language: Английский

Citations

7
Short-term trend and temporal variations in atmospheric methane at an Atlantic coastal site in Southwestern Europe DOI
R. Padilla, J.A. Adame, Pablo J. Hidalgo

et al.

Atmospheric Environment, Journal Year: 2024, Volume and Issue: 333, P. 120665 - 120665

Published: June 19, 2024

Language: Английский

Citations

2
Cloud condensation nuclei activity of internally mixed particle populations at a remote marine free troposphere site in the North Atlantic Ocean DOI
Zezhen Cheng,

Megan Morgenstern,

Silvia Henning

et al.

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 904, P. 166865 - 166865

Published: Sept. 9, 2023

Language: Английский

Citations

5
Molecular and physical composition of tar balls in wildfire smoke: an investigation with complementary ionisation methods and 15-Tesla FT-ICR mass spectrometry DOI Creative Commons
Amna Ijaz, William Kew, Zezhen Cheng

et al.

Environmental Science Atmospheres, Journal Year: 2023, Volume and Issue: 3(10), P. 1552 - 1562

Published: Jan. 1, 2023

Laser desorption ionisation, coupled with ultrahigh-resolution mass spectrometry, provides an apt reflection of the physical properties tar balls in wildfire smoke.

Language: Английский

Citations

5
Physicochemical characterization and source apportionment of Arctic ice-nucleating particles observed in Ny-Ålesund in autumn 2019 DOI Creative Commons
Guangyu Li, Elise K. Wilbourn, Zezhen Cheng

et al.

Atmospheric chemistry and physics, Journal Year: 2023, Volume and Issue: 23(18), P. 10489 - 10516

Published: Sept. 22, 2023

Abstract. Ice-nucleating particles (INPs) initiate primary ice formation in Arctic mixed-phase clouds (MPCs), altering cloud radiative properties and modulating precipitation. For atmospheric INPs, the complexity of their spatiotemporal variations, heterogeneous sources, evolution via intricate interactions challenge understanding impact on microphysical processes MPCs induce an uncertain representation climate models. In this work, we performed a comprehensive analysis aerosols at coastal site Ny-Ålesund (Svalbard, Norway) from October to November 2019, including nucleation ability, physicochemical properties, potential sources. Overall, INP concentrations (NINP) during observation season were approximately up 3 orders magnitude lower compared global average, with several samples showing degradation NINP after heat treatment, implying presence proteinaceous INPs. Particle fluorescence was substantially associated warmer temperatures, indicating that far-reaching Arctic, biogenic origin throughout snow- ice-free may serve as important addition, case studies revealed links between elevated lability, fluorescence, high wind speeds originating ocean, augmented concentration coarse-mode particles, abundant organics. Backward trajectory demonstrated connection high-latitude dust sources concentrations, while prolonged air mass history over pack identified for most scant cases. The combination above analyses demonstrates abundance, INPs are highly variable despite its remote location.

Language: Английский

Citations

5
Case study evaluation of size-resolved molecular composition and phase state of carbonaceous particles in wildfire influenced smoke from the Pacific Northwest DOI Creative Commons
Gregory W. Vandergrift, Nurun Nahar Lata, Susan Mathai

et al.

Environmental Science Atmospheres, Journal Year: 2023, Volume and Issue: 3(9), P. 1251 - 1261

Published: Jan. 1, 2023

Wildfires are significant sources of carbonaceous particles in the atmosphere.

Language: Английский

Citations

4
Response to Comment on “Size-Resolved Elemental Composition of Respiratory Particles in Three Healthy Subjects” DOI Creative Commons
Linsey C. Marr, Zezhen Cheng, Weinan Leng

et al.

Environmental Science & Technology Letters, Journal Year: 2024, Volume and Issue: 11(7), P. 767 - 769

Published: June 25, 2024

ADVERTISEMENT RETURN TO ARTICLES ASAPPREVCorrespondence/Rebut...Correspondence/RebuttalNEXTResponse to Comment on "Size-Resolved Elemental Composition of Respiratory Particles in Three Healthy Subjects"Linsey C. Marr*Linsey MarrDepartment Civil and Environmental Engineering, Virginia Tech, Blacksburg, 24061, United States*[email protected]More by Linsey Marrhttps://orcid.org/0000-0003-3628-6891, Zezhen ChengZezhen ChengEnvironmental Molecular Sciences Laboratory, Pacific Northwest National Richland, Washington 99354, StatesMore Chenghttps://orcid.org/0000-0001-6320-4519, Weinan LengWeinan LengDepartment Leng, Swarup ChinaSwarup ChinaEnvironmental Chinahttps://orcid.org/0000-0001-7670-335X, Aaron J. Prussin IIAaron Prussin, IIDepartment IIhttps://orcid.org/0000-0002-9991-8537Cite this: Environ. Sci. Technol. Lett. 2024, XXXX, XXX, XXX-XXXPublication Date (Web):June 25, 2024Publication History Received17 June 2024Accepted20 2024Published online25 2024https://pubs.acs.org/doi/10.1021/acs.estlett.4c00484https://doi.org/10.1021/acs.estlett.4c00484article-commentaryACS Publications© 2024 The Authors. Published American Chemical Society. This publication is licensed under CC-BY 4.0. License Summary*You are free share (copy redistribute) this article any medium or format adapt (remix, transform, build upon) the material for purpose, even commercially within parameters below:Creative Commons (CC): a Creative license.Attribution (BY): Credit must be given creator.View full license*DisclaimerThis summary highlights only some key features terms actual license. It not license has no legal value. Carefully review before using these materials. Open Access indicated. Learn MoreArticle Views-Altmetric-Citations-LEARN ABOUT THESE METRICSArticle Views COUNTER-compliant sum text downloads since November 2008 (both PDF HTML) across all institutions individuals. These metrics regularly updated reflect usage leading up last few days.Citations number other articles citing article, calculated Crossref daily. Find more information about citation counts.The Altmetric Attention Score quantitative measure attention that research received online. Clicking donut icon will load page at altmetric.com with additional details score social media presence article. how calculated. Share Add toView InAdd Full Text ReferenceAdd Description ExportRISCitationCitation abstractCitation referencesMore Options onFacebookXWechatLinked InRedditEmail (1020 KB) Get e-AlertscloseSUBJECTS:Computer simulations,Elements,Liquids,Nanoparticles,Particles e-Alerts

Language: Английский

Citations

1
Comment on “Size-Resolved Elemental Composition of Respiratory Particles in Three Healthy Subjects” DOI Creative Commons
Steven C. Hill, D. Doughty

Environmental Science & Technology Letters, Journal Year: 2024, Volume and Issue: 11(7), P. 765 - 766

Published: June 25, 2024

ADVERTISEMENT RETURN TO ARTICLES ASAPCorrespondence/Rebut...Correspondence/RebuttalNEXTComment on "Size-Resolved Elemental Composition of Respiratory Particles in Three Healthy Subjects"Steven C. Hill*Steven HillU.S. Army DEVCOM Research Laboratory, 2800 Powder Mill Road, Adelphi, Maryland 20783, United States*[email protected]More by Steven Hillhttps://orcid.org/0000-0002-7217-1795 and David Doughty*David DoughtyU.S. DoughtyCite this: Environ. Sci. Technol. Lett. 2024, XXXX, XXX, XXX-XXXPublication Date (Web):June 25, 2024Publication History Received29 March 2024Accepted20 June 2024Revised15 April 2024Published online25 2024https://pubs.acs.org/doi/10.1021/acs.estlett.4c00243https://doi.org/10.1021/acs.estlett.4c00243article-commentaryACS PublicationsNot subject to U.S. Copyright. Published 2024 American Chemical Society. This publication is available under these Terms Use. Request reuse permissions free access through this site. Learn MoreArticle Views-Altmetric-Citations-LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum full text article downloads since November 2008 (both PDF HTML) across all institutions individuals. These metrics regularly updated reflect usage leading up last few days.Citations number other articles citing article, calculated Crossref daily. Find more information about citation counts.The Altmetric Attention Score a quantitative measure attention that research has received online. Clicking donut icon will load page at altmetric.com with additional details score social media presence for given article. how calculated. Share Add toView InAdd Full Text ReferenceAdd Description ExportRISCitationCitation abstractCitation referencesMore Options onFacebookXWechatLinked InRedditEmail (717 KB) Get e-AlertscloseSUBJECTS:Aerosols,Carbon,Elements,Liquids,Polymer particles e-Alerts

Language: Английский

Citations

1
Enrichment of Phosphates, Lead, and Mixed Soil‐Organic Particles in INPs at the Southern Great Plains Site DOI Creative Commons
Gavin C. Cornwell, Isabelle Steinke, Nurun Nahar Lata

et al.

Journal of Geophysical Research Atmospheres, Journal Year: 2024, Volume and Issue: 129(13)

Published: June 26, 2024

Abstract Ice nucleating particles (INPs) are rare that initiate primary ice formation, a critical step required for subsequent important cloud microphysical processes ultimately govern phase and radiative properties. Laboratory studies have found organic‐rich dusts, such as those in soils, more efficient INPs compared to mineral dust. However, the atmospheric relevance of these dusts not well understood, particularly regions with significant agricultural activity. The Agricultural nuclei at Southern Great Plains field campaign (AGINSGP) was conducted rural Oklahoma investigate how soil contribute INP populations Plains. We present chemical characterization ambient crystal residual from single day sampling, using particle mass spectrometry (SPMS) scanning microscopy. Ambient were primarily carbonaceous or secondary aerosol, while fraction dust higher particles. also observed an unusual type consisting core mixed fragments on surface, which proportion residuals. Dust measured during sampling contained greater proportions phosphate ( 63 79 ) lead 206 Pb + ). Strong sulfate signals seen by SPMS, nitrate slightly depleted relative This study shows soils may be contributors population regions.

Language: Английский

Citations

1