Faraday Discussions最新文献

{"title":"List of participants","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":49075,"journal":{"name":"Faraday Discussions","volume":"258 ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144291723","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":"Poster list","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":49075,"journal":{"name":"Faraday Discussions","volume":"258 ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144291724","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":"Snow and ice: general discussion","authors":"Markus Ammann, Veronica Amoruso, Patrick Ayotte, Thorsten Bartels-Rausch, Hendrik Bluhm, James Brean, Tillmann Buttersack, Lucy J. Carpenter, Rohit Chikkaraddy, Jenée D. Cyran, Bruno Delille, Markus M. Frey, Dwayne Heard, Alexis Lamothe, Kathy S. Law, Jingqiu Mao, Sönke Maus, Jennifer G. Murphy, Peter K. Peterson, Christian Pfrang, Francesca Salteri, Joel Savarino, Jochen Stutz, Céline Toubin, Xin Yang and Paul Zieger","doi":"10.1039/D5FD90015H","DOIUrl":"10.1039/D5FD90015H","url":null,"abstract":"","PeriodicalId":49075,"journal":{"name":"Faraday Discussions","volume":"258 ","pages":" 568-596"},"PeriodicalIF":3.4,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144179765","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":"Ten crucial unknowns in atmospheric chemistry in the cold","authors":"Thorsten Bartels-Rausch, Jessie Creamean, Jennie L. Thomas, Megan Willis and Paul Zieger","doi":"10.1039/D5FD00056D","DOIUrl":"10.1039/D5FD00056D","url":null,"abstract":"<p >The Southern Ocean, wintertime cities, the upper troposphere, the Arctic and Antarctica, and alpine mountains are places where atmospheric chemistry impacts human health, air quality, climate, or geochemical cycles and that are characterized by low temperatures where ice or snow can be present. The atmospheric impact is evident from the role of polar biogenic sulphur emissions on aerosol formation, multiphase nitrogen and sulphur chemistry on wintertime haze, and industrial emissions in snow-covered areas on the ozone budget. The Cryosphere and ATmospheric CHemistry community (CATCH) addresses the environmental processes within these coupled cryosphere–atmosphere systems, and here we present open research questions specific to the cold environments, focusing on the unique interplay of chemistry and physics. These research needs call for interdisciplinary approaches to address atmospheric science in a warming climate with changing human impact in Earth's cold regions.</p>","PeriodicalId":49075,"journal":{"name":"Faraday Discussions","volume":"258 ","pages":" 10-22"},"PeriodicalIF":3.4,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/fd/d5fd00056d?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144172069","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":"Aerosol, clouds and particles: general discussion","authors":"Sarah Albertin, Markus Ammann, Thorsten Bartels-Rausch, James Brean, Lucy J. Carpenter, Rohit Chikkaraddy, Martyn P. Chipperfield, Giancarlo Ciarelli, Hugh Coe, Jenée D. Cyran, Barbara D’Anna, Bruno Delille, Valerio Ferracci, Markus M. Frey, Natasha Garner, Dwayne Heard, Zamin A. Kanji, Saewung Kim, Julia Kojoj, Alexis Lamothe, Kathy S. Law, Sönke Maus, Claudia Mohr, Jennifer G. Murphy, Christian Pfrang, Kerri Pratt, Tjarda Roberts, Jochen Stutz, Thomas Whale, Megan Willis, Xin Yang and Paul Zieger","doi":"10.1039/D5FD90012C","DOIUrl":"10.1039/D5FD90012C","url":null,"abstract":"","PeriodicalId":49075,"journal":{"name":"Faraday Discussions","volume":"258 ","pages":" 171-200"},"PeriodicalIF":3.4,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144172061","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":"Multiphase chemistry: general discussion","authors":"Sarah Albertin, Markus Ammann, Patrick Ayotte, Thorsten Bartels-Rausch, Hendrik Bluhm, James Brean, Natalie Brett, Lucy V. Brown, Tillmann Buttersack, Lucy J. Carpenter, Rohit Chikkaraddy, Hugh Coe, Jenée D. Cyran, Natasha Garner, Dwayne Heard, Deanna Huff, Saewung Kim, Jingqiu Mao, Jennifer G. Murphy, Christian Pfrang, Kerri A. Pratt, Matti Rissanen, Joel Savarino, Céline Toubin, Thomas Whale and Megan Willis","doi":"10.1039/D5FD90014J","DOIUrl":"10.1039/D5FD90014J","url":null,"abstract":"","PeriodicalId":49075,"journal":{"name":"Faraday Discussions","volume":"258 ","pages":" 419-440"},"PeriodicalIF":3.4,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144118367","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 and chemistry: general discussion†","authors":"Markus Ammann, James Brean, Lucy J. Carpenter, Rohit Chikkaraddy, Martyn P. Chipperfield, Barbara D’Anna, Valerio Ferracci, Markus M. Frey, Dwayne E. Heard, Saffron G. Heddell, Alicia Hoffman, Deanna Huff, Bianca Lauster, Kathy S. Law, Jingqiu Mao, Claudia Mohr, Jennifer G. Murphy, Peter K. Peterson, Kerri A. Pratt, Tjarda J. Roberts, Joel Savarino, Freya Squires, Jochen Stutz, Megan Willis and Xin Yang","doi":"10.1039/D5FD90013A","DOIUrl":"10.1039/D5FD90013A","url":null,"abstract":"","PeriodicalId":49075,"journal":{"name":"Faraday Discussions","volume":"258 ","pages":" 328-356"},"PeriodicalIF":3.4,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144118369","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":"Concluding remarks: Atmospheric chemistry in cold environments†","authors":"Markus Ammann","doi":"10.1039/D5FD00042D","DOIUrl":"10.1039/D5FD00042D","url":null,"abstract":"<p >Atmospheric chemistry in cold environments refers to key chemical processes occurring in Earth’s atmosphere in locations relevant for society including the polar areas, the free and upper troposphere, and the stratosphere. Atmospheric chemistry in these areas is relevant for local air quality, ecosystem health, regional and global climate. This <em>Faraday Discussion</em> comprised excellent coverage of these areas in terms of longitude and latitude, altitude and temperature. It also featured a broad coverage of disciplines between physical, analytical and theoretical chemistry and also the related fields covering aspects of biology, health, meteorology, social sciences and even including policy and economic aspects. A core aspect of the discussions was rooted in interfacing the related diverse competences. Because traditional atmospheric chemistry has evolved around knowledge of mechanisms and kinetics of chemical reactions first in the gas phase and later including condensed phases of aerosol particles and ground surfaces centering around room temperature, the speciality of relevance in this <em>Faraday Discussion</em> was the recent progress in better understanding the evolution of multiphase chemistry at low temperatures, where many relevant properties such as solubility and volatility change dramatically. This was embedded in discussions of the results and challenges of the most recent measurements from a range of campaigns and long-term observations at research stations. The discussion evolved around the chemical cycles of important trace constituents, the formation and evolution of particulate matter under cold conditions, the link between cloud glaciation and air-mass characteristics, air-quality in cold urban environments, biosphere–atmosphere interactions in a warming Arctic, but also the role of interfacial chemistry and reactivity as they are involved in multiphase chemistry processes. Future threats for the cold part of our atmosphere come from increasing human activities in both polar regions with their impacts on ecosystems, air quality and broader scale atmospheric composition as well as from discussions of geoengineering <em>via</em> solar radiation modification by stratospheric aerosol injection.</p>","PeriodicalId":49075,"journal":{"name":"Faraday Discussions","volume":"258 ","pages":" 597-613"},"PeriodicalIF":3.4,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12056704/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143953058","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":"The impact of the Himalayan aerosol factory: results from high resolution numerical modelling of pure biogenic nucleation over the Himalayan valleys†","authors":"Giancarlo Ciarelli, Arineh Cholakian, Manuel Bettineschi, Bruno Vitali, Bertrand Bessagnet, Victoria A. Sinclair, Johannes Mikkola, Imad el Haddad, Dino Zardi, Angela Marinoni, Alessandro Bigi, Paolo Tuccella, Jaana Bäck, Hamish Gordon, Tuomo Nieminen, Markku Kulmala, Douglas Worsnop and Federico Bianchi","doi":"10.1039/D4FD00171K","DOIUrl":"10.1039/D4FD00171K","url":null,"abstract":"<p >Observational data collected in December 2014 at the base camp of Mount Everest, Nepal, indicated frequent new particle formation events of pure biogenic origin. Those events were speculated to be controlled by the along-valley winds forming in the valley connecting the Indo-Gangetic plain to the observational site, the Nepal Climate Observatory-Pyramid. The valley winds funnel highly oxygenated organic molecules of biogenic origin to higher elevations where they nucleate. The mechanism was referred to as “The Himalayan aerosol factory”. Its geographical extent and climate implications are currently unknown. In view of this, we conducted numerical chemical model simulations to corroborate the presence of the mechanism, and to quantify its geographical extent. Our numerical simulations confirmed that biogenic emissions located in the valleys can be converted into ultra-low volatility organic compounds, transported to the observational site by the along-valley winds, and therein nucleate. The overall time scale of the process, from the release of biogenic emissions to the conversion to ultra-low volatile organic compounds to the arrival time at the observational site, was found to be around 4 hours, consistent with the predicted along-valley winds intensity and the geographical distribution of biogenic emissions. A first estimation of the maximum injection height of biogenic particles, and highly oxygenated organic molecules, indicated the presence of efficient nucleating gases and biogenic particles at an elevation as high as 5000–6000 m a.s.l. These results suggest that the Himalayan chain, under specific weather conditions, is a main contributor to the biogenic aerosol loads in the free troposphere. Considering these findings, field campaigns, especially at the entrance of the valley’s floors, and research consortia supporting atmospheric research in Asian mountain regions, are highly encouraged.</p>","PeriodicalId":49075,"journal":{"name":"Faraday Discussions","volume":"258 ","pages":" 76-93"},"PeriodicalIF":3.4,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11922043/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143655666","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":"Modeling attainment in Fairbanks, Alaska, for the wintertime PM2.5 24-hour non-attainment area using the CMAQ (community multi-scale air quality) model†","authors":"Deanna Huff, Tom Carlson, Lakshmi Pradeepa Vennam, Chao-Jung Chien, Kathleen Fahey, Robert Gilliam and Nick Czarnecki","doi":"10.1039/D4FD00158C","DOIUrl":"10.1039/D4FD00158C","url":null,"abstract":"&lt;p &gt;Fairbanks Alaska has some of the highest recorded levels of fine particulate matter (PM&lt;small&gt;&lt;sub&gt;2.5&lt;/sub&gt;&lt;/small&gt;) in the United States (U.S.), exceeding health-based standards since 2009. The National Ambient Air Quality Standard (NAAQS) in the U.S. for 24 h PM&lt;small&gt;&lt;sub&gt;2.5&lt;/sub&gt;&lt;/small&gt; is 35 μg m&lt;small&gt;&lt;sup&gt;−3&lt;/sup&gt;&lt;/small&gt; with a 24 h averaging time and takes the form of the 98th percentile averaged over three years; the three-year average is called a design value. Monitored PM&lt;small&gt;&lt;sub&gt;2.5&lt;/sub&gt;&lt;/small&gt; level design values have been as high as 135 μg m&lt;small&gt;&lt;sup&gt;−3&lt;/sup&gt;&lt;/small&gt; or almost 4 times higher than the health-based standard. The current monitored PM&lt;small&gt;&lt;sub&gt;2.5&lt;/sub&gt;&lt;/small&gt; value for 2021–2023 is 56 μg m&lt;small&gt;&lt;sup&gt;−3&lt;/sup&gt;&lt;/small&gt;. Fairbanks winters have strong temperature inversions, trapping pollutants near the ground and leading to elevated concentrations of PM&lt;small&gt;&lt;sub&gt;2.5&lt;/sub&gt;&lt;/small&gt; and its precursor gases. The two largest species component contributors to PM&lt;small&gt;&lt;sub&gt;2.5&lt;/sub&gt;&lt;/small&gt; in Fairbanks are organic carbon and sulfate. Control strategies have focused on reducing organic carbon through wood-stove measures and SO&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt; through fuel sulfur reductions. State Implementation Plans (SIPs) are mandatory plans that demonstrate the most expeditious path to reaching the health-based standard. In previous SIPs, the Alaska Department of Environmental Conservation (ADEC) based attainment demonstrations on an outdated modeling platform, emissions inventory, meteorological data, and episodes. Recent updates include upgrading to the CMAQ (Community Multi-Scale Air Quality) model version 5.3.3+ and updated Weather Research and Forecast (WRF) meteorology resulting from a collaboration with the United States Environmental Protection Agency Office of Research and Development (EPA-ORD) and recent Alaska Layered Pollution and Chemical Analysis (ALPACA) studies. In addition, there have been updates to the emissions inventory (survey, census, parcel and home-heating energy demand model) for space heating and other pre-processing models. The changes have resulted in improved model performance in representing stable boundary layers in meteorology and Model Performance Evaluation (MPE) of secondary sulfate. Modeled secondary sulfate went from underpredicting 88% of the observed sulfate values using the previous modeling platform, to improved sulfate predictions with only a 2.5% Normalized Mean Bias (NMB) and 40% Normalized Mean Error (NME). Using the sulfur tracking method, CMAQ modeling suggests that in Fairbanks, 60% of the sulfate is primary, and 40% is secondary on average for our wintertime modeling period. The modeled primary and secondary fractions of sulfate are corroborated by Moon &lt;em&gt;et al.&lt;/em&gt; 2024 (&lt;em&gt;ACS ES&amp;T Air&lt;/em&gt;, 2024, &lt;strong&gt;1&lt;/strong&gt;, 139–149), showing 62% of the ambient measured sulfate particles were primary and 38% were secondary in Fairbanks, during the ALPACA field","PeriodicalId":49075,"journal":{"name":"Faraday Discussions","volume":"258 ","pages":" 234-264"},"PeriodicalIF":3.4,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143555386","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}