Article
Geosciences, Multidisciplinary
Georgios I. Gkatzelis, Dimitrios K. Papanastasiou, Vlassis A. Karydis, Thorsten Hohaus, Ying Liu, Sebastian H. Schmitt, Patrick Schlag, Hendrik Fuchs, Anna Novelli, Qi Chen, Xi Cheng, Sebastian Broch, Huabin Dong, Frank Holland, Xin Li, Yuhan Liu, Xuefei Ma, David Reimer, Franz Rohrer, Min Shao, Zhaofeng Tan, Domenico Taraborrelli, Ralf Tillmann, Haichao Wang, Yu Wang, Yusheng Wu, Zhijun Wu, Limin Zeng, Jun Zheng, Min Hu, Keding Lu, Andreas Hofzumahaus, Yuanhang Zhang, Andreas Wahner, Astrid Kiendler-Scharr
Summary: Despite the recent decrease in pollution events in Chinese urban areas, the World Health Organization air quality guideline values are still exceeded. Observations show a stronger decrease of organic aerosol directly emitted to the atmosphere relative to secondary organic aerosol (SOA) generated from oxidation processes. The uptake of water-soluble gas-phase oxidation products is reported as a major SOA contribution to particulate pollution in Beijing, triggered by the increase of aerosol liquid water. In pollution episodes, this pathway can explain the increase in SOA mass, with specific substances contributing 15%-25% of the increase. Future mitigation strategies should focus on reducing non-methane volatile organic compound emissions to reduce organic particulate pollution in China.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Review
Environmental Sciences
Zhujun Yu, Ying Li
Summary: Volatile organic compounds (VOCs) are crucial in global atmospheric chemistry, with marine VOC distribution and their role still unclear, necessitating further research.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Multidisciplinary
Farzaneh Khalaj, Albert Rivas-Ubach, Christopher R. Anderton, Swarup China, Kailen Mooney, Celia L. Faiola
Summary: This study examined the effects of aphid herbivory on BVOC emissions and SOA formation from a common shrub, finding that aphids altered the BVOC emission profile but had minimal impact on SOA mass yields. However, an increase in acyclic terpenes in the BVOC mixture was correlated with reduced SOA mass yield, emphasizing the importance of understanding acyclic terpene chemistry in the atmosphere for predicting SOA in current and future climates.
ACS EARTH AND SPACE CHEMISTRY
(2021)
Article
Engineering, Environmental
Michael A. Robinson, Zachary C. J. Decker, Kelley C. Barsanti, Matthew M. Coggon, Frank M. Flocke, Alessandro Franchin, Carley D. Fredrickson, Jessica B. Gilman, Georgios Gkatzelis, Christopher D. Holmes, Aaron Lamplugh, Avi Lavi, Ann M. Middlebrook, Denise M. Montzka, Brett B. Palm, Jeff Peischl, Brad Pierce, Rebecca H. Schwantes, Kanako Sekimoto, Vanessa Selimovic, Geoffrey S. Tyndall, Joel A. Thornton, Paul Van Rooy, Carsten Warneke, Andrew J. Weinheimer, Steven S. Brown
Summary: The study highlights the importance of understanding the efficiency and variability of photochemical ozone production from western wildfire plumes in accurately estimating their impact on North American air quality. Results show that afternoon plumes reach higher O-3 mixing ratios in a shorter time frame than evening plumes, with HOx production from fire emissions playing a significant role. Evening plumes, on the other hand, are more influenced by reduction in photolysis rates and fire emissions in their O-3 production process.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Review
Environmental Sciences
Mithlesh Mahilang, Manas Kanti Deb, Shamsh Pervez
Summary: The review discusses the atmospheric reaction mechanism of BVOCs and the formation of secondary organic aerosols, highlighting differences between day and night in SOA formation. Daytime SOA formation is dominated by OH and O-3, while nighttime formation is dominated by NOx. Analytical techniques like 2D-GC/MS are essential for studying organic aerosols, and radiative forcing SOA is a useful parameter for evaluating environmental impacts.
Article
Engineering, Environmental
Janaina P. Nascimento, Henrique M. J. Barbosa, Alessandro L. Banducci, Luciana V. Rizzo, Angel Liduvino Vara-Vela, Bruno B. Meller, Helber Gomes, Andre Cezar, Marco A. Franco, Milena Ponczek, Stefan Wolff, Megan M. Bela, Paulo Artaxo
Summary: In the Amazon rainforest, anthropogenic atmospheric emissions interact with biogenic emissions and result in high concentrations of ozone and secondary organic aerosols. These high concentrations affect a large primary forested area and atmospheric dynamics and photochemistry play a key role in their production.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Plant Sciences
Chang Guo, Xiaona Wang, Qi Wang, Zipeng Zhao, Bing Xie, Lang Xu, Ruijie Zhang
Summary: This review provides an overview of the effects of ozone pollution on plant secondary metabolism. It explores the role of plant secondary metabolism in defense against ozone stress and adaptation to ozone-polluted environments, while summarizing the severity of ozone pollution.
ENVIRONMENTAL AND EXPERIMENTAL BOTANY
(2024)
Article
Engineering, Environmental
Xinyi Dong, Yaman Liu, Xiao Li, Man Yue, Yawen Liu, Zongwei Ma, Haotian Zheng, Ruqi Huang, Minghuai Wang
Summary: This study used simulations to examine the response of biogenic secondary organic aerosol (BSOA) to anthropogenic emissions in China. The results showed that sulfate (SO4) significantly promoted the formation of BSOA, while high levels of nitrogen oxides (NOx) suppressed its production. The study also predicted a slightly increased contribution of BSOA to PM2.5 in the future.
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2022)
Article
Meteorology & Atmospheric Sciences
Huang Zheng, Shaofei Kong, Nan Chen, Zhenzhen Niu, Ying Zhang, Shuning Jiang, Yingying Yan, Shihua Qi
Summary: This study used the PMF model to apportion different VOC sources, revealing that industrial sources contributed most to L-OH and SOAP, while vehicle emissions had the highest contribution to OFP.
ATMOSPHERIC RESEARCH
(2021)
Article
Engineering, Environmental
Lauren A. Garofalo, Yicong He, Shantanu H. Jathar, Jeffrey R. Pierce, Carley D. Fredrickson, Brett B. Palm, Joel A. Thornton, Fabian Mahrt, Giuseppe V. Crescenzo, Allan K. Bertram, Danielle C. Draper, Juliane L. Fry, John Orlando, Xuan Zhang, Delphine K. Farmer
Summary: This study reveals the details of organic aerosol formation and the condensation patterns of different chemical substances in the air, providing a deeper understanding of air quality and Earth's radiative balance.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Environmental Sciences
Ying Yu, Hui Wang, Tiantian Wang, Kai Song, Tianyi Tan, Zichao Wan, Yaqin Gao, Huabin Dong, Shiyi Chen, Limin Zeng, Min Hu, Hongli Wang, Shengrong Lou, Wenfei Zhu, Song Guo
Summary: The study in Yangtze River Delta region indicates the significant impact of semi-volatile organic compounds (SVOCs) on secondary organic aerosol (SOA) formation, with a good correlation between secondary organic carbon (SOC) and odd oxygen (Ox) showing the important role of photochemical reactions in SOA formation.
ATMOSPHERIC ENVIRONMENT
(2021)
Article
Meteorology & Atmospheric Sciences
Chenyang Bi, Jordan E. Krechmer, Manjula R. Canagaratna, Gabriel Isaacman-VanWertz
Summary: This study examines the bias in log-linear calibration relationships in the context of CIMS and proposes a parameter-explicit solution for completely removing the inherent bias. A simplified correction method is suggested for cases where comprehensive bias correction is not possible, showing an average elimination of bias but not for each individual compound.
ATMOSPHERIC MEASUREMENT TECHNIQUES
(2021)
Review
Meteorology & Atmospheric Sciences
Li Xu, Lin Du, Narcisse T. Tsona, Maofa Ge
Summary: Anthropogenic emissions significantly impact the formation of biogenic secondary organic aerosol through changes in radical chemistry, gas-particle partitioning, and sulfuric acid formation. Effective pollutant mitigation policies are crucial in reducing the formation of biogenic SOA and improving the overall air quality.
ADVANCES IN ATMOSPHERIC SCIENCES
(2021)
Article
Environmental Sciences
Francisco Javier Gomez-Moreno, Elisabeth Alonso-Blanco, Elias Diaz, Esther Coz, Francisco Molero, Lourdes Nunez, Magdalena Palacios, Marcos Barreiro, Javier Fernandez, Pedro Salvador, Maria Pineiro-Iglesias, Purificacion Lopez-Mahia, Esther Borras, Teresa Vera, Amalia Munoz, Torsten Tritscher, Sebastian Schmitt, Begona Artinano
Summary: A field campaign was conducted in the Madrid region to investigate the influence of volatile organic compounds (VOCs) on the formation of new particles in ambient air. Measurements of gas and particle properties and composition were carried out at different sites, revealing that new particle formation events occurred at a regional scale and exhibited variations among the sites.
ENVIRONMENTAL RESEARCH COMMUNICATIONS
(2022)
Article
Environmental Sciences
Philipp G. Eger, Luc Vereecken, Rolf Sander, Jan Schuladen, Nicolas Sobanski, Horst Fischer, Einar Karu, Jonathan Williams, Ville Vakkari, Tuukka Petaja, Jos Lelieveld, Andrea Pozzer, John N. Crowley
Summary: By measuring gas-phase pyruvic acid in the boreal forest, the impact of its photolysis on the formation of acetaldehyde and peroxy radicals was studied. The results show that the photolysis of pyruvic acid is a significant source of acetaldehyde and acetylperoxy radicals.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2021)
Article
Engineering, Environmental
Emma L. D'Ambro, Noora Hyttinen, Kristian H. Moller, Siddharth Iyer, Rasmus Otkjaer, David M. Bell, Jiumeng Liu, Felipe D. Lopez-Hilfiker, Siegfried Schobesberger, John E. Shilling, Alla Zelenyuk, Henrik G. Kjaergaard, Joel A. Thornton, Theo Kurten
Summary: This study presents chamber-based measurements of Delta 3-carene oxidation products and develops an oxidation mechanism based on computational methods. The research shows the presence of highly oxidized organic molecules during Delta 3-carene oxidation, and highlights the importance of alkoxy bond scission and hydrogen abstraction from methyl groups in HOM formation.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Environmental Sciences
Elisa Mannisto, Henni Ylanne, Mari Losoi, Markku Keinanen, Pasi Yli-Pirila, Aino Korrensalo, Jaana Back, Heidi Hellen, Annele Virtanen, Eeva-Stiina Tuittila
Summary: The quantity and quality of BVOC emissions from peatland ecosystems in southern Finland are influenced by vegetation and peatland type, with isoprene being the dominant compound. Climate change, including increased shrub cover and more frequent extreme weather events, may have a negative impact on total BVOC emissions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Agronomy
Thaomy Vo, Celia L. Faiola
Summary: Biogenic volatile organic compounds (BVOCs) play a crucial role in ecological and atmospheric processes, but their emission rates and composition can change under plant stress. This study investigated the effects of acute ozone exposure on BVOC emissions in Canary Island pines, commonly used in urban landscaping. The results showed that ozone exposure did not exacerbate urban air quality degradation in these pines.
AGRICULTURAL AND FOREST METEOROLOGY
(2023)
Article
Engineering, Environmental
Linyu Gao, Angela Buchholz, Zijun Li, Junwei Song, Magdalena Vallon, Feng Jiang, Ottmar Mohler, Thomas Leisner, Harald Saathoff
Summary: "We investigated the secondary organic aerosol (SOA) formed from the oxidation of beta-caryophyllene at different tropospheric temperatures. Positive matrix factorization (PMF) analysis was used to separate the SOA products detected by a chemical ionization mass spectrometer (FIGAERO-CIMS). We observed a nonmonotonic dependence of particle volatility on formation temperature due to temperature-dependent formation pathways. The PMF analysis grouped the detected ions into 11 compound groups that act as indicators for the underlying formation mechanisms."
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Natalie R. Smith, Giuseppe V. Crescenzo, Allan K. Bertram, Sergey A. Nizkorodov, Celia L. Faiola
Summary: Plant stress can affect the emissions of volatile organic compounds, which in turn can impact the properties of secondary organic aerosols (SOA). This study examined the chemical composition and viscosity of SOA generated from healthy and aphid-stressed Canary Island pine trees. The results show that aphid-stressed pine tree SOA has higher viscosity, which is attributed to the increased fraction of sesquiterpenes in the emissions.
ACS EARTH AND SPACE CHEMISTRY
(2023)
Article
Geosciences, Multidisciplinary
Theodore Khadir, Ilona Riipinen, Sini Talvinen, Dominic Heslin-Rees, Christopher Poehlker, Luciana Rizzo, Luiz A. T. Machado, Marco A. Franco, Leslie A. Kremper, Paulo Artaxo, Tuukka Petaja, Markku Kulmala, Peter Tunved, Annica M. L. Ekman, Radovan Krejci, Annele Virtanen
Summary: Interactions between atmospheric aerosols, clouds, and precipitation have significant impacts on Earth's radiative balance and air quality, but their effects are still poorly constrained. Precipitation can serve as both a source and a sink for particles, but the magnitude of these sources and sinks remains uncertain. In this study, multi-year in situ observations from various environments were analyzed, revealing links between recent precipitation and increased particle concentrations, including cloud condensation nuclei (CCN)-sized particles. In some cases, the particle source introduced by precipitation was equal to or even greater than the corresponding removal effect. These findings emphasize the importance of considering cloud-processed material in determining surface-level particle concentrations and the value of long-term observational data for understanding aerosol particle life cycles. Quantitative assessment of large-scale significance can be achieved through robust patterns identified in sufficiently long data series.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
Anna Lintunen, Juho Aalto, Ari Asmi, Mika Aurela, Jaana Back, Mikael Ehn, Ekaterina Ezhova, Hannele Hakola, Kari Hartonen, Jussi Heinonsalo, Heidi Hellen, Teemu Holtta, Tuija Jokinen, Leena Jarvi, Heikki Jarvinen, Juha Kangasluoma, Veli-Matti Kerminen, Pasi Kolari, Kajar Koster, Egle Koster, Liisa Kulmala, Theo Kurten, Ari Laaksonen, Hanna K. Lappalainen, Tuomas Lauril, Katrianne Lehtipalo, Heikki Lihavainen, Annalea Lohila, Mari Losoi, Annikki Makela, Risto Makkonen, Ivan Mammarella, Santtu Mikkone, Dmitri Moisseev, Anne Ojala, Tuukka Petaja, Mari Pihlatie, Albert Porcar-Castell, Arnaud P. Praplan, Jouni Pulliainen, Jukka Pumpanen, Pekka Rantala, Marja-Liisa Riekkola, Kaisa Rissanen, Sami Romakkaniemi, Jose Ruiz-Jimenez, Nina Sarnela, Simon Schallhar, Pauliina Schiestl-Aalt, Janne Rinne, Eeva-Stiina Tuittila, Hanna Vehkamaki, Timo Vesala, Yrjo Viisanen, Annele Virtanen, Ilona Ylivink, Pertti Hari, Markku Kulmala
Summary: The study of atmospheric processes related to climate requires a multidisciplinary approach, and the Academy of Finland Centre of Excellence in atmospheric sciences (CoE ATM) has been conducting extensive research for 18 years. The work in the CoE ATM has improved our understanding of biogeochemical cycles, ecosystem processes, aerosols, ions, neutral clusters, cloud formation, and their interactions. Through a combination of observations, remote sensing, experiments, and modeling, the CoE ATM has enabled improved conceptual understanding across spatial and temporal scales, serving as a platform for multidisciplinary research.
BOREAL ENVIRONMENT RESEARCH
(2023)
Article
Engineering, Environmental
Linyu Gao, Angela Buchholz, Zijun Li, Junwei Song, Magdalena Vallon, Feng Jiang, Ottmar Mohler, Thomas Leisner, Harald Saathoff
Summary: We investigated the secondary organic aerosol (SOA) generated from the ozonolysis of β-caryophyllene over a wide range of temperatures (213-313 K) and found a nonmonotonic dependence of particle volatility on formation temperature, primarily due to temperature-dependent formation pathways of β-caryophyllene oxidation products. Positive matrix factorization (PMF) was used to deconvolute the detected SOA products and revealed different compound groups with varying volatilities, providing new insights into the temperature-dependent formation mechanisms of β-caryophyllene-derived SOA particles.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Lucia Caudillo, Mihnea Surdu, Brandon Lopez, Mingyi Wang, Markus Thoma, Steffen Brakling, Angela Buchholz, Mario Simon, Andrea C. Wagner, Tatjana Mueller, Manuel Granzin, Martin Heinritzi, Antonio Amorim, David M. Bell, Zoe Brasseur, Lubna Dada, Jonathan Duplissy, Henning Finkenzeller, Xu-Cheng He, Houssni Lamkaddam, Naser G. A. Mahfouz, Vladimir Makhmutov, Hanna E. Manninen, Guillaume Marie, Ruby Marten, Roy L. Mauldin, Bernhard Mentler, Antti Onnela, Tuukka Petaja, Joschka Pfeifer, Maxim Philippov, Ana A. Piedehierro, Birte Rorup, Wiebke Scholz, Jiali Shen, Dominik Stolzenburg, Christian Tauber, Ping Tian, Antonio Tome, Nsikanabasi Silas Umo, Dongyu S. Wang, Yonghong Wang, Stefan K. Weber, Andre Welti, Marcel Zauner-Wieczorek, Urs Baltensperger, Richard C. Flagan, Armin Hansel, Jasper Kirkby, Markku Kulmala, Katrianne Lehtipalo, Douglas R. Worsnop, Imad El Haddad, Neil M. Donahue, Alexander L. Vogel, Andreas Kuerten, Joachim Curtius
Summary: The complete chemical characterization of nanoparticles is challenging due to their abundance but negligible mass. This study compares different techniques for the chemical composition analysis of secondary organic aerosol nanoparticles. The experiments were conducted at the CLOUD chamber, and simultaneous measurements were performed using four different techniques. The results generally agree on the important compounds found in the nanoparticles, but each technique captures different parts of the organic spectrum, potentially due to factors such as thermal decomposition or sampling artifacts.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Environmental Sciences
Lejish Vettikkat, Pasi Miettinen, Angela Buchholz, Pekka Rantala, Hao Yu, Simon Schallhart, Tuukka Petaja, Roger Seco, Elisa Mannisto, Markku Kulmala, Eeva-Stiina Tuittila, Alex B. Guenther, Siegfried Schobesberger
Summary: Wetlands cover a small portion of the land surface but boreal wetlands are experiencing significant warming and emit climate-relevant volatile organic compounds. This study presents the first-ever measurements of terpene emissions from a boreal fen wetland and found that isoprene was the dominant compound emitted. The emissions showed a strong exponential dependence on temperature and were significantly higher than previous estimates.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Environmental Sciences
Zijun Li, Angela Buchholz, Luis M. F. Barreira, Arttu Ylisirnio, Liqing Hao, Iida Pullinen, Siegfried Schobesberger, Annele Virtanen
Summary: Many recent studies on secondary organic aerosols (SOA) have focused on biogenic SOA particles formed in pristine environments with low NOx conditions. However, there is a lack of knowledge about the evaporation and volatility of biogenic SOA particles formed in the presence of high concentrations of NOx. This study investigates the isothermal evaporation and composition evolution of alpha-pinene SOA particles formed under both low NOx and high NOx conditions, providing detailed insights into the processes controlling their evaporation.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Forestry
Jouni Kilpelainen, Timo Domisch, Tarja Lehto, Minna Kivimaenpaa, Francoise Martz, Sirpa Piirainen, Tapani Repo
Summary: The aboveground parts of boreal forest trees grow earlier in the growing season, while the roots mostly grow later. This study aimed to investigate whether root growth follows soil temperature or if shoot growth also demands resources in the early growing season. The researchers examined the direct effects of different soil temperature patterns on the physiology and leaf anatomy of silver birch seedlings.
Article
Meteorology & Atmospheric Sciences
Lisa J. Beck, Siegfried Schobesberger, Mikko Sipila, Veli-Matti Kerminen, Markku Kulmala
Summary: This study proposes a theoretical method to estimate sulfuric acid concentration based on ambient ion composition and concentration measurements, validated with accurate observations using CI-APi-TOF instruments. The developed estimate works well during daytime in a boreal forest, but underestimates sulfuric acid concentration in the Antarctic atmosphere during new particle formation events.
ATMOSPHERIC MEASUREMENT TECHNIQUES
(2022)
Article
Environmental Sciences
Noora Hyttinen, Iida Pullinen, Aki Nissinen, Siegfried Schobesberger, Annele Virtanen, Taina Yli-Juuti
Summary: Accurate determination of gas-to-particle partitioning is crucial for modeling secondary organic aerosol formation. In this study, we estimated the saturation vapor pressures of alpha-pinene-ozonolysis-derived secondary organic aerosol constituents using experimental and computational methods. The results showed a good agreement between the two methods for molecules with molar masses around 190 g mol(-1) and higher.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2022)