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Atmospheric Chemistry and Physics Discussions (ACPD)
Number of Followers: 16  

  This is an Open Access Journal Open Access journal
ISSN (Print) 1680-7367 - ISSN (Online) 1680-7375
Published by Copernicus Publications Homepage  [54 journals]
  • Future changes in atmospheric rivers over East Asia under stratospheric
           aerosol intervention

    • Abstract: Future changes in atmospheric rivers over East Asia under stratospheric aerosol intervention
      Ju Liang and Jim Haywood
      Atmos. Chem. Phys., 23, 1687–1703, https://doi.org/10.5194/acp-23-1687-2023, 2023
      The recent record-breaking flood events in China during the summer of 2021 highlight the importance of mitigating the risks from future changes in high-impact weather systems under global warming. Based on a state-of-the-art Earth system model, we demonstrate a pilot study on the responses of atmospheric rivers and extreme precipitation over East Asia to anthropogenically induced climate warming and an unconventional mitigation strategy – stratospheric aerosol injection.
      PubDate: Mon, 30 Jan 2023 23:38:10 +010
      DOI: 10.5194/acp-23-1687-2023 2023

       
  • Evolution of Organic Carbon in the Laboratory Oxidation of Biomass Burning
           Emissions

    • Abstract: Evolution of Organic Carbon in the Laboratory Oxidation of Biomass Burning Emissions
      Kevin John Nihill, Matthew M. Coggon, Christopher Y. Lim, Abigail R. Koss, Bin Yuan, Jordan E. Krechmer, Kanako Sekimoto, Jose-Luis Jimenez, Joost de Gouw, Christopher D. Cappa, Colette L. Heald, Carsten Warneke, and Jesse H. Kroll
      Atmos. Chem. Phys. Discuss., https//doi.org/10.5194/acp-2022-857,2023
      Preprint under review for ACP (discussion: open, 0 comments)
      In this work, we collect emissions from controlled burns of biomass fuels that can be found in the Western US into an environmental chamber in order to simulate their oxidation as they pass through the atmosphere. These findings provide a detailed characterization of the composition of the atmosphere downwind of wildfires. In turn, this will help to explore the effects of these changing emissions on downwind populations, and will also directly inform atmospheric and climate models.
      PubDate: Mon, 30 Jan 2023 23:38:10 +010
      DOI: 10.5194/acp-2022-8572023

       
  • Development, intercomparison and evaluation of an improved mechanism for
           the oxidation of dimethyl sulfide in the UKCA model

    • Abstract: Development, intercomparison and evaluation of an improved mechanism for the oxidation of dimethyl sulfide in the UKCA model
      Ben A. Cala, Scott Archer-Nicholls, James Weber, Nathan Luke Abraham, Paul T. Griffiths, Lorrie Jacob, Y. Matthew Shin, Laura E. Revell, Matthew Woodhouse, and Alexander T. Archibald
      Atmos. Chem. Phys. Discuss., https//doi.org/10.5194/acp-2023-42,2023
      Preprint under review for ACP (discussion: open, 0 comments)
      DMS is an important trace gas emitted from the ocean recognised as setting the sulfate aerosol background. But its oxidation is complex. As a result representation in chemistry-climate models is greatly simplified. We develop & compare a new mechanism to existing mechanisms via a series of global and box model experiments. Our global model studies show our updated DMS scheme is a significant improvement. However, sensitivity studies underscore need for further lab & observational constraints.
      PubDate: Mon, 30 Jan 2023 23:38:10 +010
      DOI: 10.5194/acp-2023-422023

       
  • Saturation vapor pressure characterization of selected low-volatility
           organic compounds using a residence time chamber

    • Abstract: Saturation vapor pressure characterization of selected low-volatility organic compounds using a residence time chamber
      Zijun Li, Noora Hyttinen, Miika Vainikka, Olli-Pekka Tikkasalo, Siegfried Schobesberger, and Taina Yli-Juuti
      Atmos. Chem. Phys. Discuss., https//doi.org/10.5194/acp-2023-43,2023
      Preprint under review for ACP (discussion: open, 0 comments)
      Saturation vapor pressures (psat) of low-volatility organic compounds (LVOCs) govern their partitioning between gas and particle phases. To estimate the psat of selected LVOCs, we performed particle evaporation measurements in a residence time chamber at a temperature setting relevant to atmospheric aerosol formation and also conducted state-of-the-art computational calculations. We found a good agreement between the experimentally measured and model-estimated psat values for most of the LVOCs.
      PubDate: Mon, 30 Jan 2023 23:38:10 +010
      DOI: 10.5194/acp-2023-432023

       
  • Characterization of dust-related new particle formation events based on
           long-term measurement in North China Plain

    • Abstract: Characterization of dust-related new particle formation events based on long-term measurement in North China Plain
      Xiaojing Shen, Junying Sun, Yangmei Zhang, Chunhong Zhou, Ke Gui, Wanyun Xu, Quan Liu, Junting Zhong, Can Xia, Xinyao Hu, Sinan Zhang, Jialing Wang, Shuo Liu, Jiayuan Lu, and Xiaoye Zhang
      Atmos. Chem. Phys. Discuss., https//doi.org/10.5194/acp-2022-837,2023
      Preprint under review for ACP (discussion: open, 0 comments)
      The influence of dust on new particle formation events was analyzed in this study based on long-term particle number size distribution measurement in Beijing. It revealed the anthropogenic emissions can contribute approximately 50 % to the nucleation and 30 % to the particle growth. When a severe dust storm passed, the particle chemical composition, hygroscopicity can be also modified, which influenced the ability to be activated as cloud condensation nuclei.
      PubDate: Mon, 30 Jan 2023 23:38:10 +010
      DOI: 10.5194/acp-2022-8372023

       
  • Long-term monitoring of cloud water chemistry at Whiteface Mountain: the
           emergence of a new chemical regime

    • Abstract: Long-term monitoring of cloud water chemistry at Whiteface Mountain: the emergence of a new chemical regime
      Christopher E. Lawrence, Paul Casson, Richard Brandt, James J. Schwab, James E. Dukett, Phil Snyder, Elizabeth Yerger, Daniel Kelting, Trevor C. VandenBoer, and Sara Lance
      Atmos. Chem. Phys., 23, 1619–1639, https://doi.org/10.5194/acp-23-1619-2023, 2023
      Atmospheric aqueous chemistry can have profound effects on our environment, as illustrated by historical data from Whiteface Mountain (WFM) that were critical for uncovering the process of acid rain. The current study updates the long-term trends in cloud water composition at WFM for the period 1994 to 2021. We highlight the emergence of a new chemical regime at WFM dominated by organics and ammonium, quite different from the highly acidic regime observed in the past but not necessarily clean.
      PubDate: Fri, 27 Jan 2023 22:04:29 +010
      DOI: 10.5194/acp-23-1619-2023 2023

       
  • Comparing the ice nucleation properties of the kaolin minerals kaolinite
           and halloysite

    • Abstract: Comparing the ice nucleation properties of the kaolin minerals kaolinite and halloysite
      Kristian Klumpp, Claudia Marcolli, Ana Alonso-Hellweg, Christopher H. Dreimol, and Thomas Peter
      Atmos. Chem. Phys., 23, 1579–1598, https://doi.org/10.5194/acp-23-1579-2023, 2023
      The prerequisites of a particle surface for efficient ice nucleation are still poorly understood. This study compares the ice nucleation activity of two chemically identical but morphologically different minerals (kaolinite and halloysite). We observe, on average, not only higher ice nucleation activities for halloysite than kaolinite but also higher diversity between individual samples. We identify the particle edges as being the most likely site for ice nucleation.
      PubDate: Fri, 27 Jan 2023 22:04:29 +010
      DOI: 10.5194/acp-23-1579-2023 2023

       
  • Hydroxyl airglow observations for investigating atmospheric dynamics:
           results and challenges

    • Abstract: Hydroxyl airglow observations for investigating atmospheric dynamics: results and challenges
      Sabine Wüst, Michael Bittner, Patrick J. Espy, W. John R. French, and Frank J. Mulligan
      Atmos. Chem. Phys., 23, 1599–1618, https://doi.org/10.5194/acp-23-1599-2023, 2023
      Ground-based OH* airglow measurements have been carried out for almost 100 years. Advanced detector technology has greatly simplified the automatic operation of OH* airglow observing instruments and significantly improved the temporal and/or spatial resolution. Studies based on long-term measurements or including a network of instruments are reviewed, especially in the context of deriving gravity wave properties. Scientific and technical challenges for the next few years are described.
      PubDate: Fri, 27 Jan 2023 22:04:29 +010
      DOI: 10.5194/acp-23-1599-2023 2023

       
  • Modeling the influence of chain length on secondary organic aerosol (SOA)
           formation via multiphase reactions of alkanes

    • Abstract: Modeling the influence of chain length on secondary organic aerosol (SOA) formation via multiphase reactions of alkanes
      Azad Madhu, Myoseon Jang, and David Deacon
      Atmos. Chem. Phys., 23, 1661–1675, https://doi.org/10.5194/acp-23-1661-2023, 2023
      SOA formation is simulated using the UNIPAR model for series of linear alkanes. The inclusion of autoxidation reactions within the explicit gas mechanisms of C9–C12 was found to significantly improve predictions. Available product distributions were extrapolated with an incremental volatility coefficient (IVC) to predict SOA formation of alkanes without explicit mechanisms. These product distributions were used to simulate SOA formation from C13 and C15 and had good agreement with chamber data.
      PubDate: Fri, 27 Jan 2023 22:04:29 +010
      DOI: 10.5194/acp-23-1661-2023 2023

       
  • How aerosol size matters in aerosol optical depth (AOD) assimilation and
           the optimization using the Ångström exponent

    • Abstract: How aerosol size matters in aerosol optical depth (AOD) assimilation and the optimization using the Ångström exponent
      Jianbing Jin, Bas Henzing, and Arjo Segers
      Atmos. Chem. Phys., 23, 1641–1660, https://doi.org/10.5194/acp-23-1641-2023, 2023
      Aerosol models and satellite retrieval algorithms rely on different aerosol size assumptions. In practice, differences between simulations and observations do not always reflect the difference in aerosol amount. To avoid inconsistencies, we designed a hybrid assimilation approach. Different from a standard aerosol optical depth (AOD) assimilation that directly assimilates AODs, the hybrid one estimates aerosol size parameters by assimilating Ängström observations before assimilating the AODs.
      PubDate: Fri, 27 Jan 2023 22:04:29 +010
      DOI: 10.5194/acp-23-1641-2023 2023

       
  • Fates of secondary organic aerosols in the atmosphere identified from
           compound-specific dual-carbon isotope analysis of oxalic acid

    • Abstract: Fates of secondary organic aerosols in the atmosphere identified from compound-specific dual-carbon isotope analysis of oxalic acid
      Buqing Xu, Jiao Tang, Tiangang Tang, Shizhen Zhao, Guangcai Zhong, Sanyuan Zhu, Jun Li, and Gan Zhang
      Atmos. Chem. Phys., 23, 1565–1578, https://doi.org/10.5194/acp-23-1565-2023, 2023
      We analyzed compound-specific dual-carbon isotope signatures (Δ14C and δ13C) of dominant secondary organic aerosol (SOA) tracer molecules (i.e., oxalic acid) to investigate the fates of SOAs in the atmosphere at five emission hotspots in China. The results indicated that SOA carbon sources and chemical processes producing SOAs vary spatially and seasonally, and these variations need to be included in Chinese climate projection models and air quality management practices.
      PubDate: Fri, 27 Jan 2023 22:04:29 +010
      DOI: 10.5194/acp-23-1565-2023 2023

       
  • Vertical profiles of volatile organic compounds and fine particles in
           atmospheric air by using aerial drone with miniaturized samplers and
           portable devices

    • Abstract: Vertical profiles of volatile organic compounds and fine particles in atmospheric air by using aerial drone with miniaturized samplers and portable devices
      Eka Dian Pusfitasari, Jose Ruiz-Jimenez, Aleksi Tiusanen, Markus Suuronen, Jesse Haataja, Juha Kangasluoma, Krista Luoma, Tuukka Petäjä, Matti Jussila, Kari Hartonen, and Marja-Liisa Riekkola
      Atmos. Chem. Phys. Discuss., https//doi.org/10.5194/acp-2023-40,2023
      Preprint under review for ACP (discussion: open, 0 comments)
      A miniaturized air sampling-drone system was successfully applied for the collection of volatile organic compounds (VOCs) and for the measurement of black carbon (BC) and total particle number concentrations in atmospheric air. Here we report, for the first time, the vertical profiles of BC and aerosol number concentrations above the boreal forest in Hyytiälä (Finland) at high altitudes close to the boundary layer in autumn 2021. VOC composition with its distribution was studied as well.
      PubDate: Fri, 27 Jan 2023 22:04:29 +010
      DOI: 10.5194/acp-2023-402023

       
  • Modeling of street-scale pollutant dispersion by coupled simulation of
           chemical reaction, aerosol dynamics, and CFD

    • Abstract: Modeling of street-scale pollutant dispersion by coupled simulation of chemical reaction, aerosol dynamics, and CFD
      Chao Lin, Yunyi Wang, Ryozo Ooka, Cédric Flageul, Youngseob Kim, Hideki Kikumoto, Zhizhao Wang, and Karine Sartelet
      Atmos. Chem. Phys., 23, 1421–1436, https://doi.org/10.5194/acp-23-1421-2023, 2023
      In this study, SSH-aerosol, a modular box model that simulates the evolution of gas, primary, and secondary aerosols, is coupled with the computational fluid dynamics (CFD) software, OpenFOAM and Code_Saturne. The transient dispersion of pollutants emitted from traffic in a street canyon of Greater Paris is simulated. The coupled model achieved better agreement in NO2 and PM10 with measurement data than the conventional CFD simulation which regards pollutants as passive scalars.
      PubDate: Thu, 26 Jan 2023 22:04:29 +010
      DOI: 10.5194/acp-23-1421-2023 2023

       
  • Magnetic fraction of the atmospheric dust in Kraków – physicochemical
           characteristics and possible environmental impact

    • Abstract: Magnetic fraction of the atmospheric dust in Kraków – physicochemical characteristics and possible environmental impact
      Jan M. Michalik, Wanda Wilczyńska-Michalik, Łukasz Gondek, Waldemar Tokarz, Jan Żukrowski, Marta Gajewska, and Marek Michalik
      Atmos. Chem. Phys., 23, 1449–1464, https://doi.org/10.5194/acp-23-1449-2023, 2023
      The magnetic fraction of the aerosols in Kraków was collected and analysed using scanning and transmission electron microscopy with energy-dispersive spectrometry, X-ray diffraction, Mössbauer spectrometry, and magnetometry. It contains metallic Fe or Fe-rich alloy and Fe oxides. The occurrence of nanometre-scale Fe3O4 particles (predominantly of anthropogenic origin) is shown. Our results can help to determine the sources and transport of pollutants, potential harmful effects, etc.
      PubDate: Thu, 26 Jan 2023 22:04:29 +010
      DOI: 10.5194/acp-23-1449-2023 2023

       
  • Using Orbiting Carbon Observatory-2 (OCO-2) column CO2 retrievals to
           rapidly detect and estimate biospheric surface carbon flux anomalies

    • Abstract: Using Orbiting Carbon Observatory-2 (OCO-2) column CO2 retrievals to rapidly detect and estimate biospheric surface carbon flux anomalies
      Andrew F. Feldman, Zhen Zhang, Yasuko Yoshida, Abhishek Chatterjee, and Benjamin Poulter
      Atmos. Chem. Phys., 23, 1545–1563, https://doi.org/10.5194/acp-23-1545-2023, 2023
      We investigate the conditions under which satellite-retrieved column carbon dioxide concentrations directly hold information about surface carbon dioxide fluxes, without the use of inversion models. We show that OCO-2 column carbon dioxide retrievals, available at 1–3 month latency, can be used to directly detect and roughly estimate extreme biospheric CO2 fluxes. As such, these OCO-2 retrievals have value for rapidly monitoring extreme conditions in the terrestrial biosphere.
      PubDate: Thu, 26 Jan 2023 22:04:29 +010
      DOI: 10.5194/acp-23-1545-2023 2023

       
  • Summertime ozone pollution in China affected by stratospheric
           quasi-biennial oscillation

    • Abstract: Summertime ozone pollution in China affected by stratospheric quasi-biennial oscillation
      Mengyun Li, Yang Yang, Hailong Wang, Huimin Li, Pinya Wang, and Hong Liao
      Atmos. Chem. Phys., 23, 1533–1544, https://doi.org/10.5194/acp-23-1533-2023, 2023
      Using the GEOS-Chem model, the impact of the quasi-biennial oscillation (QBO) on summertime tropospheric O3 in China is investigated. In the warm phases of sea surface temperature anomalies over the eastern tropical Pacific, the QBO has a significant positive correlation with near-surface O3 concentrations over central China. The QBO impacts on O3 pollution in China are mainly a result of changing vertical transport of O3.
      PubDate: Thu, 26 Jan 2023 22:04:29 +010
      DOI: 10.5194/acp-23-1533-2023 2023

       
  • Declining, seasonal-varying emissions of sulfur hexafluoride from the
           United States

    • Abstract: Declining, seasonal-varying emissions of sulfur hexafluoride from the United States
      Lei Hu, Deborah Ottinger, Stephanie Bogle, Stephen A. Montzka, Philip L. DeCola, Ed Dlugokencky, Arlyn Andrews, Kirk Thoning, Colm Sweeney, Geoff Dutton, Lauren Aepli, and Andrew Crotwell
      Atmos. Chem. Phys., 23, 1437–1448, https://doi.org/10.5194/acp-23-1437-2023, 2023
      Effective mitigation of greenhouse gas (GHG) emissions relies on an accurate understanding of emissions. Here we demonstrate the added value of using inventory- and atmosphere-based approaches for estimating US emissions of SF6, the most potent GHG known. The results suggest a large decline in US SF6 emissions, shed light on the possible processes causing the differences between the independent estimates, and identify opportunities for substantial additional emission reductions.
      PubDate: Thu, 26 Jan 2023 22:04:29 +010
      DOI: 10.5194/acp-23-1437-2023 2023

       
  • Ground-level gaseous pollutants (NO2, SO2, and CO) in China: daily
           seamless mapping and spatiotemporal variations

    • Abstract: Ground-level gaseous pollutants (NO2, SO2, and CO) in China: daily seamless mapping and spatiotemporal variations
      Jing Wei, Zhanqing Li, Jun Wang, Can Li, Pawan Gupta, and Maureen Cribb
      Atmos. Chem. Phys., 23, 1511–1532, https://doi.org/10.5194/acp-23-1511-2023, 2023
      This study estimated the daily seamless 10 km ambient gaseous pollutants (NO2, SO2, and CO) across China using machine learning with extensive input variables measured on monitors, satellites, and models. Our dataset yields a high data quality via cross-validation at varying spatiotemporal scales and outperforms most previous related studies, making it most helpful to future (especially short-term) air pollution and environmental health-related studies.
      PubDate: Thu, 26 Jan 2023 22:04:29 +010
      DOI: 10.5194/acp-23-1511-2023 2023

       
  • Flaring efficiencies and NOx emission ratios measured for offshore oil and
           gas facilities in the North Sea

    • Abstract: Flaring efficiencies and NOx emission ratios measured for offshore oil and gas facilities in the North Sea
      Jacob T. Shaw, Amy Foulds, Shona Wilde, Patrick Barker, Freya A. Squires, James Lee, Ruth Purvis, Ralph Burton, Ioana Colfescu, Stephen Mobbs, Samuel Cliff, Stéphane J.-B. Bauguitte, Stuart Young, Stefan Schwietzke, and Grant Allen
      Atmos. Chem. Phys., 23, 1491–1509, https://doi.org/10.5194/acp-23-1491-2023, 2023
      Flaring is used by the oil and gas sector to dispose of unwanted natural gas or for safety. However, few studies have assessed the efficiency with which the gas is combusted. We sampled flaring emissions from offshore facilities in the North Sea. Average measured flaring efficiencies were ~ 98 % but with a skewed distribution, including many flares of lower efficiency. NOx and ethane emissions were also measured. Inefficient flaring practices could be a target for mitigating carbon emissions.
      PubDate: Thu, 26 Jan 2023 22:04:29 +010
      DOI: 10.5194/acp-23-1491-2023 2023

       
  • Measurement report: Aerosol vertical profiles over the western North
           Atlantic Ocean during the North Atlantic Aerosols and Marine Ecosystems
           Study (NAAMES)

    • Abstract: Measurement report: Aerosol vertical profiles over the western North Atlantic Ocean during the North Atlantic Aerosols and Marine Ecosystems Study (NAAMES)
      Francesca Gallo, Kevin J. Sanchez, Bruce E. Anderson, Ryan Bennett, Matthew D. Brown, Ewan C. Crosbie, Chris Hostetler, Carolyn Jordan, Melissa Yang Martin, Claire E. Robinson, Lynn M. Russell, Taylor J. Shingler, Michael A. Shook, Kenneth L. Thornhill, Elizabeth B. Wiggins, Edward L. Winstead, Armin Wisthaler, Luke D. Ziemba, and Richard H. Moore
      Atmos. Chem. Phys., 23, 1465–1490, https://doi.org/10.5194/acp-23-1465-2023, 2023
      We integrate in situ ship- and aircraft-based measurements of aerosol, trace gases, and meteorological parameters collected during the NASA North Atlantic Aerosols and Marine Ecosystems Study (NAAMES) field campaigns in the western North Atlantic Ocean region. A comprehensive characterization of the vertical profiles of aerosol properties under different seasonal regimes is provided for improving the understanding of aerosol key processes and aerosol–cloud interactions in marine regions.
      PubDate: Thu, 26 Jan 2023 22:04:29 +010
      DOI: 10.5194/acp-23-1465-2023 2023

       
 
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