Faraday Discussions最新文献

{"title":"Direct high-altitude observations of 2-methyltetrols in the gas- and particle phase in air masses from Amazonia","authors":"Claudia Mohr, Joel A. Thornton, Manish Shrivastava, Anouck Chassaing, Ilona Riipinen, Federico Bianchi, Marcos Andrade and Cheng Wu","doi":"10.1039/D4FD00179F","DOIUrl":"10.1039/D4FD00179F","url":null,"abstract":"<p >We present direct observations of 2-methyltetrol (C<small>₅</small>H<small>₁₂</small>O<small>₄</small>) in the gas- and particle phase from the deployment of a Filter Inlet for Gases and Aerosols coupled to a Time-of-Flight Chemical Ionization Mass Spectrometer (FIGAERO-CIMS) during the Southern Hemisphere High Altitude Experiment on Particle Nucleation and Growth (SALTENA), which took place between December 2017 and June 2018 at the high-altitude Global Atmosphere Watch station Chacaltaya (CHC) located at 5240 m a s l in the Bolivian Andes. 2-Methyltetrol signals were dominant in a factor resulting from Positive Matrix Factorization (PMF) identified as influenced by Amazon emissions. We combine these observations with investigations of isoprene oxidation chemistry and uptake in an isolated deep convective cloud in the Amazon using a photochemical box model with coupled cloud microphysics and show that, likely, 2-methyltetrol is taken up by hydrometeors or formed <em>in situ</em> in the convective cloud, and then transported in the particle phase in the cold environment of the Amazon outflow and to the station, where it partially evaporates.</p>","PeriodicalId":49075,"journal":{"name":"Faraday Discussions","volume":"258 ","pages":" 60-75"},"PeriodicalIF":3.4,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11868990/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143522101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Poster list","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":49075,"journal":{"name":"Faraday Discussions","volume":"257 ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143430620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"List of participants","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":49075,"journal":{"name":"Faraday Discussions","volume":"257 ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143430618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Scanning electrochemical probe microscopy: general discussion","authors":"Paolo Actis, Lane A. Baker, Giada Caniglia, Zhifeng Ding, Andrew G. Ewing, Kaiyu X. Fu, Lachlan F. Gaudin, J. Justin Gooding, Jingshu Hui, Dechen Jiang, Frédéric Kanoufi, John J. Kasianowicz, Moonjoo Kim, Christine Kranz, Christian Kuttner, Yunchao Li, Liang Liu, Si-Min Lu, Wenjun Luo, Kim McKelvey, Andrew R. Mount, Hang Ren, Yuanhua Shao, Mei Shen, Yasufumi Takahashi, Juan Tang, Dengchao Wang, Liang Wang, Wei Wang, Yunong Wang, Ruo-Chen Xie, Yuelin Xie, Yi-Lun Ying, Guohui Zhang, Lingjie Zhang, Ziwen Zhao and Yige Zhou","doi":"10.1039/D4FD90069C","DOIUrl":"10.1039/D4FD90069C","url":null,"abstract":"","PeriodicalId":49075,"journal":{"name":"Faraday Discussions","volume":"257 ","pages":" 277-302"},"PeriodicalIF":3.4,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143044967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spectroelectrochemistry and light active process at nanointerface: general discussion","authors":"Zhifeng Ding, Andrew G. Ewing, Kaiyu X. Fu, Caleb M. Hill, Kaoru Hiramoto, Frédéric Kanoufi, John J. Kasianowicz, Christine Kranz, Christian Kuttner, Shuang-Yan Lang, Fei Li, Liang Liu, Jin Lu, Andrew R. Mount, Hang Ren, Yuanhua Shao, Mei Shen, Yasufumi Takahashi, Wei Wang, Fan Xia, Guohui Zhang, Ziwen Zhao and Yige Zhou","doi":"10.1039/D4FD90070G","DOIUrl":"10.1039/D4FD90070G","url":null,"abstract":"","PeriodicalId":49075,"journal":{"name":"Faraday Discussions","volume":"257 ","pages":" 151-164"},"PeriodicalIF":3.4,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143044979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Low-cost electrochemical gas sensing of vertical differences in wintertime air composition (CO, NO, NO2, O3) in Fairbanks, Alaska†","authors":"Tjarda J. Roberts, Meeta Cesler-Maloney and William R. Simpson","doi":"10.1039/D4FD00177J","DOIUrl":"10.1039/D4FD00177J","url":null,"abstract":"<p >Wintertime Fairbanks, Alaska, experiences episodes of severely poor air quality, when local emissions (<em>e.g.</em>, home-heating, vehicular) are enhanced by cold conditions and are trapped by temperature inversions. Monitoring of atmospheric composition, and in particular vertical gradients in composition, is challenging under cold Arctic conditions. This study demonstrates that multiple sets of low-cost electrochemical sensors can provide accurate measurement of CO, NO, NO<small>₂</small>, and O<small>₃</small> air composition across wide-ranging cold Arctic temperatures (0 °C to −30 °C). The sensors quantify vertical gradients in downtown Fairbanks’ atmospheric composition during winter 2021. Low-cost electrochemical sensors (with temperature co-measured) were characterised by cross-comparison to a regulatory air-quality monitoring site. We demonstrate excellent agreement of the electrochemical sensors with the reference monitors (<em>R</em><small>²</small> &gt; 0.86–0.98), with mean absolute errors &lt;5 ppbv (NO, NO<small>₂</small>, O<small>₃</small>) and &lt;50 ppbv (CO) over gas-ranges of 10–100’s, and 3000 ppbv, respectively, sufficient for using the low-cost electrochemical sensors to quantitatively investigate NO–NO<small>₂</small>–O<small>₃</small> atmospheric chemistry. During four weeks in February–March 2021, sensors placed on the rooftop (20 m) and base (3 m) of a building in downtown Fairbanks identified strong gradients in atmospheric composition over a very short &lt;20 m vertical scale at times when near-surface temperature inversions were present. At night, CO and NO<small>_<em>x</em></small> were more concentrated at the surface than aloft, and surface ozone was depleted whilst sometimes being present aloft. During the daytime, when solar radiation heated the surface, inversions were disrupted by efficient vertical mixing that mixed in ozone-rich air from above. The low-cost sensor observations demonstrate that near-surface pollutant trapping was correlated with thermal inversions and trace O<small>₃</small>–NO<small>_<em>x</em></small> atmospheric chemistry, and quantify a local O<small>_<em>x</em></small> source from direct “primary” NO<small>₂</small> emissions, with a directly emitted NO<small>₂</small> : NO<small>_<em>x</em></small> ratio of 0.13 mol mol<small>⁻¹</small>. The sensors also characterise NO<small>_<em>x</em></small> emissions, finding a NO<small>_<em>x</em></small> : CO of 0.15 mol mol<small>⁻¹</small>. When well-characterised, low-cost electrochemical sensors can provide valuable measurements of local emissions and vertically-resolved atmospheric composition, with sufficient accuracy to trace atmospheric chemistry in cold and stable wintertime urban environments.</p>","PeriodicalId":49075,"journal":{"name":"Faraday Discussions","volume":"258 ","pages":" 307-327"},"PeriodicalIF":3.4,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/fd/d4fd00177j?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143571694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Systems nanoelectrochemistry from single entity to ensemble: general discussion","authors":"Paolo Actis, Koichi Aoki, Lane A. Baker, Giada Caniglia, Ning Dang, Zhifeng Ding, Andrew G. Ewing, Kaiyu X. Fu, J. Justin Gooding, Kaoru Hiramoto, Dechen Jiang, Frédéric Kanoufi, John J. Kasianowicz, Christine Kranz, Shuang-Yan Lang, Fei Li, Haoran Li, Liang Liu, Yi-Tao Long, Jin Lu, Si-Min Lu, Kim McKelvey, Andrew R. Mount, Hang Ren, Yuanhua Shao, Mei Shen, Zuzanna S. Siwy, Yasufumi Takahashi, Juan Tang, Haiyan Wang, Jun-Gang Wang, Kang Wang, Liang Wang, Yunong Wang, Fan Xia, Ruo-Chen Xie, Yi-Lun Ying, Guohui Zhang and Ziwen Zhao","doi":"10.1039/D4FD90068E","DOIUrl":"10.1039/D4FD90068E","url":null,"abstract":"","PeriodicalId":49075,"journal":{"name":"Faraday Discussions","volume":"257 ","pages":" 399-424"},"PeriodicalIF":3.4,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143031682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Confined nanopore electrochemistry: general discussion","authors":"Paolo Actis, Koichi Aoki, Lane A. Baker, Zhifeng Ding, Andrew G. Ewing, Kaiyu X. Fu, J. Justin Gooding, Jun Huang, Frédéric Kanoufi, John J. Kasianowicz, Moonjoo Kim, Christine Kranz, Christian Kuttner, Fei Li, Liang Liu, Wei Liu, Jin Lu, Si-Min Lu, Kim McKelvey, Andrew R. Mount, Hang Ren, Yuanhua Shao, Yasufumi Takahashi, Shuo Tan, Juan Tang, Haiyan Wang, Kang Wang, Liang Wang, Weihua Wang, Fan Xia, Tianyi Xiong, Yi-Lun Ying, Yueming Zhai, Ziwen Zhao and Yige Zhou","doi":"10.1039/D4FD90067G","DOIUrl":"10.1039/D4FD90067G","url":null,"abstract":"","PeriodicalId":49075,"journal":{"name":"Faraday Discussions","volume":"257 ","pages":" 88-106"},"PeriodicalIF":3.4,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143021282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Transport of continental particulate over the Labrador Sea and entrainment are important pathways for glaciation of remote marine clouds†","authors":"Hugh Coe, Huihui Wu, Nicholas Marsden, Michael Biggart, Keith N. Bower, Tom Choularton, Michael Flynn, Martin W. Gallagher, Kezhen Hu, Gary Lloyd, Graeme J. Nott, Paul F. Field and Benjamin J. Murray","doi":"10.1039/D5FD00005J","DOIUrl":"10.1039/D5FD00005J","url":null,"abstract":"<p >Marine Arctic clouds greatly influence the radiative balance across the Arctic region and their effectiveness at scattering radiation changes considerably depending on cloud phase. Glaciation of these clouds relies on the presence of ice nucleating particles, which are often limited in number, so often clouds may be liquid even at temperatures well below 0 °C. As the Arctic region warms, cloud feedbacks may accelerate change or lessen absorbed solar radiation. Understanding aerosol–cloud interactions and the sources and pathways of aerosol particles across the Arctic region is central to improving our knowledge of these poorly understood processes. In this paper, aircraft observations of single particle chemical and physical properties are presented and the composition of cloud residuals in both warm and glaciated clouds are examined using a single-particle laser ablation aerosol particle mass spectrometer (LAAPToF). In cloud, the LAAPToF sampled behind a Counterflow Virtual Impactor (CVI) to detect cloud particle residuals, separated into liquid, mixed phase and ice clouds using <em>in situ</em> observations of the fractional ice water content. Three different air mass regimes were sampled: northerly winds in both the marine boundary layer and the lower free troposphere; westerly winds from Canada in both the marine boundary layer and the free troposphere; and periods when the boundary layer winds were northerly but the air immediately above the boundary layer was from continental Canada. When the air in the boundary layer and free troposphere was from the north, most clouds were in the liquid phase, however, considerably more glaciation was observed when the air immediately above the boundary layer clouds was from Canada regardless of the flow direction in the boundary layer. Sea salt particles dominate the observed out of cloud aerosol particle population and liquid cloud particle residuals. However, in the detected mixed phase and ice cloud particle residuals dust and bioaerosol particles were substantial in number. Since these are known to be effective ice-nucleating particles, the observations suggest that long range transport of continental air and entrainment is an important pathway for the supply of aerosol to the remote Arctic boundary layer.</p>","PeriodicalId":49075,"journal":{"name":"Faraday Discussions","volume":"258 ","pages":" 147-170"},"PeriodicalIF":3.4,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/fd/d5fd00005j?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143539676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Poster list","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":49075,"journal":{"name":"Faraday Discussions","volume":"256 ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142976251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}