Article
Chemistry, Multidisciplinary
Sarah S. Petters, Tianqu Cui, Zhenfa Zhang, Avram Gold, V. Faye McNeill, Jason D. Surratt, Barbara J. Turpin
Summary: This study investigated the rates, product branching ratios, and stereochemistry of organosulfates from reactions of dilute IEPDX under a range of sulfate concentrations and pH values. It was found that the regiochemistry and stereochemistry of products were affected by pH, with tertiary methyltetrol sulfate promoted by increasing solution acidity. The reaction rate constants under cloud-relevant conditions were significantly lower than those reported for aerosol-relevant conditions due to different solution activities.
ACS EARTH AND SPACE CHEMISTRY
(2021)
Article
Chemistry, Physical
Carmen M. Tovar, Alexander Haack, Ian Barnes, Iustinian Gabriel Bejan, Peter Wiesen
Summary: The reactivity of epoxides with chlorine atoms was evaluated using experimental determinations, theoretical calculations, and SAR estimations in this study. It was found that adding a CH2 group increases the reactivity towards chlorine atoms. Theoretical calculations were in good agreement with experimental findings, and the importance of considering geometrical distribution and ring influence for improving SAR calculations was discussed.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Multidisciplinary Sciences
Rahul A. Zaveri, Jian Wang, Jiwen Fan, Yuwei Zhang, John E. Shilling, Alla Zelenyuk, Fan Mei, Rob Newsom, Mikhail Pekour, Jason Tomlinson, Jennifer M. Comstock, Manish Shrivastava, Edward Fortner, Luiz A. T. Machado, Paulo Artaxo, Scot T. Martin
Summary: This study presents aircraft observations of rapid growth of anthropogenic nanoparticles downwind of an isolated metropolis in the Amazon rainforest. Model analysis suggests that the sustained particle growth to cloud condensation nuclei sizes is mainly caused by particle-phase diffusion-limited partitioning of semivolatile oxidation products of biogenic hydrocarbons. Cloud-resolving numerical simulations show that the increased cloud condensation nuclei concentrations in the urban plume significantly alter cloud formation and precipitation, suggesting an appreciable impact of anthropogenic aerosols on cloud life cycle in previously unpolluted forests of the world.
Article
Nanoscience & Nanotechnology
Sei-Woong Park, Seong-Yong Jeong, Young Kook Moon, KiBeom Kim, Ji-Wook Yoon, Jong-Heun Lee
Summary: This study reports a highly selective and sensitive sensor for detecting breath isoprene, which is of great significance for monitoring the physical and physiological status of human beings as well as the early diagnosis of cardiovascular diseases.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Alison M. Fankhauser, Ziying Lei, Kimberly R. Daley, Yao Xiao, Zhenfa Zhang, Avram Gold, Bruce S. Ault, Jason D. Surratt, Andrew P. Ault
Summary: Organosulfates formed from organic-derived oxidation products with sulfate ions contribute to a significant portion of secondary organic aerosol mass. However, the molecular structures of these organosulfates under atmospherically relevant conditions are not well understood. In this study, the protonation state and vibrational modes of 2-methyltetrol sulfates were investigated. It was found that these organosulfates are primarily deprotonated at atmospheric pH values.
JOURNAL OF PHYSICAL CHEMISTRY A
(2022)
Article
Biology
Toungporn Uttarotai, Sawannee Sutheeworapong, Andrew T. Crombie, J. Colin Murrell, Wuttichai Mhuantong, Nuttapol Noirungsee, Sunanta Wangkarn, Sakunnee Bovonsombut, Terry J. McGenity, Thararat Chitov
Summary: This study discovered a soil bacterium, Alcaligenes sp. 13f, capable of degrading isoprene and proposed the possibility of a different metabolic pathway for isoprene degradation.
Article
Biotechnology & Applied Microbiology
Meijie Li, Rumeng Yang, Jing Guo, Min Liu, Jianming Yang
Summary: This study successfully improved the thermostability of isoprene synthase through directed evolution. A tripartite protein folding system was used for high-throughput screening, resulting in the identification of three variants with higher stability. In vitro stability tests confirmed the increased stability of the variants. One of the variants also showed improved isoprene production.
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
(2023)
Article
Environmental Sciences
Srinivas Bikkina, Kimitaka Kawamura, Yosuke Sakamoto, Jun Hirokawa
Summary: Oxidation of isoprene can lead to the production of oxalic acid, with methylglyoxal identified as an important intermediate. The relative abundances of methylglyoxal and oxalic acid fluctuate significantly during the reaction, suggesting a complex pathway of oxalic acid formation under dry conditions. The study proposes new reaction schemes for interpreting the ambient SOA composition and highlights the stable character of C-2 towards oxidation by hydroxyl radicals.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Biotechnology & Applied Microbiology
Indrajeet Yadav, Akhil Rautela, Agendra Gangwar, Vigya Kesari, Aditya K. Padhi, Sanjay Kumar
Summary: In this study, fast-growing and CO2-tolerant cyanobacteria, Synechococcus elongatus UTEX 2973, were genetically engineered with Pueraria montana isoprene synthase (IspS) and isopentenyl diphosphate isomerase (IDI) to enhance isoprene production. The wild-type and recombinant strains were studied for growth and isoprene production in the presence of an inducer (IPTG) and/or inhibitor (alendronate). The results showed that isoprene production could be improved 4.7-fold using the inhibition strategy.
FERMENTATION-BASEL
(2023)
Article
Environmental Sciences
Wenfei Zhu, Song Guo, Zirui Zhang, Hui Wang, Ying Yu, Zheng Chen, Ruizhe Shen, Rui Tan, Kai Song, Kefan Liu, Rongzhi Tang, Yi Liu, Shengrong Lou, Yuanju Li, Wenbin Zhang, Zhou Zhang, Shijin Shuai, Hongming Xu, Shuangde Li, Yunfa Chen, Min Hu, Francesco Canonaco, Andre S. H. Prevot
Summary: The study conducted experiments on secondary organic aerosol (SOA) formation from urban cooking and vehicular sources using a high-resolution time-of-flight aerosol mass spectrometer. Results showed that cooking styles had a greater impact on aged COA mass spectra than oxidation conditions, while oxidation conditions significantly affected aged HOA spectra more than vehicle operating conditions. Mass spectra similarity analysis and positive matrix factorization were used to establish the POA and SOA mass spectra of these sources, and the improved ME-2 model better quantified the contribution of POA and SOA from cooking and vehicular sources compared to traditional ambient PMF results. This work established the vehicle and cooking SOA source profiles for the first time and can be further used in OA source apportionment in the ambient atmosphere.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Manish Shrivastava, Quazi Z. Rasool, Bin Zhao, Mega Octaviani, Rahul A. Zaveri, Alla Zelenyuk, Brian Gaudet, Ying Liu, John E. Shilling, Johannes Schneider, Christiane Schulz, Martin Zoeger, Scot T. Martin, Jianhuai Ye, Alex Guenther, Rodrigo F. Souza, Manfred Wendisch, Ulrich Poeschl
Summary: Combining aircraft measurements and model simulations, this study reveals the important role of in-plant biochemistry in fine particulate formation and atmosphere-biosphere- climate interactions over the Amazon rainforest. The study shows that direct emissions of certain gases formed by in-plant biochemical reactions explain a significant portion of sub-micrometer aerosol particles in the upper troposphere.
ACS EARTH AND SPACE CHEMISTRY
(2022)
Article
Energy & Fuels
Guangfeng Liu, Leiyu He, Zhaoqi Fan, Yilin He, Zheng Wu, Zhenjia Wang
Summary: This study investigates the natural gas solubility in brine and its influence on natural gas reserve and production in a tight gas reservoir through laboratory experiments, phase equilibrium calculations, and numerical evaluation. The research finds that solubility decreases with production and has an impact on cumulative gas production.
Article
Chemistry, Analytical
Qian Zheng, Jun Ho Lee, Seong-Jun Kim, Hyun-Sook Lee, Wooyoung Lee
Summary: The In2O3 nanoparticles exhibited excellent sensing performance for isoprene, showing high sensing response, rapid response time, low detection limit, and good long-term stability. Their sensitivity and ability to detect isoprene and H-2 in a mixture gas with other breath gases make them promising for breath isoprene analyzers when integrated into a gas chromatography system.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Thermodynamics
Huixing Zhu, Tianfu Xu, Xin Xin, Yilong Yuan, Guanhong Feng
Summary: This study introduces the concept of three-phase layer production and finds that the increase in pore water salinity is the main reason for the stable existence of the three-phase layer. The gas production rate of the three-phase layer is significantly higher compared to the gas hydrate-bearing layer. Additionally, the poor permeability of clayey silt reservoir results in a decline in gas production rate within a month.
Article
Environmental Sciences
Ana C. Morales, Thilina Jayarathne, Jonathan H. Slade, Alexander Laskin, Paul B. Shepson
Summary: Biogenic volatile organic compounds (BVOCs) emitted by plants are the largest source of non-methane hydrocarbons on Earth, with their photochemical oxidation playing a significant role in the production of secondary organic aerosols (SOA). Organic nitrates (RONO2) formed from the oxidation of BVOCs in the presence of NOx are important aerosol precursors and impact atmospheric oxidative capacity. The study on the OH-initiated oxidation of beta-ocimene reveals insights into the formation and fate of organic nitrates, beta-ocimene SOA yields, and NOx cycling in forested environments.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2021)
Article
Multidisciplinary Sciences
Eleni Dovrou, Kelvin H. Bates, Jonathan M. Moch, Loretta J. Mickley, Daniel J. Jacob, Frank N. Keutsch
Summary: Formaldehyde, the simplest and most abundant carbonyl in the atmosphere, contributes significantly to particulate matter formation via two in-cloud processing pathways. These pathways reduce the lifetime of sulfur dioxide and contribute to global sulfate.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Meteorology & Atmospheric Sciences
Hannah M. Allen, Kelvin H. Bates, John D. Crounse, Michelle J. Kim, Alexander P. Teng, Eric A. Ray, Paul O. Wennberg
Summary: Hydrogen peroxide (H2O2) and methyl hydroperoxide (MHP) are important tracers of HOx chemistry in the remote troposphere. A comparison between observations and models shows that the models under-predict H2O2 and over-predict MHP, with the differences attributed to recent convection activities.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2022)
Article
Meteorology & Atmospheric Sciences
Jinkyul Choi, Daven K. Henze, Hansen Cao, Caroline R. Nowlan, Gonzalo Gonzalez Abad, Hyeong-Ahn Kwon, Hyung-Min Lee, Yujin J. Oak, Rokjin J. Park, Kelvin H. Bates, Joannes D. Maasakkers, Armin Wisthaler, Andrew J. Weinheimer
Summary: We aim to reduce uncertainties in CH2O and VOC emissions by assimilating remote sensing data. We update a 3D transport model and constrain VOC emissions using CH2O observations. Our new inversion framework can be applied for future air quality campaigns.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2022)
Article
Multidisciplinary Sciences
James D. Cope, Kelvin H. Bates, Lillian N. Tran, Karizza A. Abellar, Tran B. Nguyen
Summary: In this study, we report the formation of sulfate anion radical (SO4•-) from the irradiation of liquid water in sulfate-containing organic aerosol particles under natural sunlight and laboratory UV radiation. Irradiation of aqueous sulfate mixed with atmospherically relevant organic compounds degrades the organics within the lifetime of aerosols. This reaction may have significant implications for our understanding of atmospheric sulfur reactions, aerosol properties, and organic aerosol lifetimes.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Chemistry, Multidisciplinary
Tran B. Nguyen, Kelvin H. Bates, Reina S. Buenconsejo, Sophia M. Charan, Eric E. Cavanna, David R. Cocker III, Douglas A. Day, Marla P. DeVault, Neil M. Donahue, Zachary Finewax, Luke F. Habib, Anne V. Handschy, Lea Hildebrandt Ruiz, Chung-Yi S. Hou, Jose L. Jimenez, Taekyu Joo, Alexandra L. Klodt, Weimeng Kong, Chen Le, Catherine G. Masoud, Matthew S. Mayernik, Nga L. Ng, Eric J. Nienhouse, Sergey A. Nizkorodov, John J. Orlando, Jeroen J. Post, Patrick O. Sturm, Bridget L. Thrasher, Geoffrey S. Tyndall, John H. Seinfeld, Steven J. Worley, Xuan Zhang, Paul J. Ziemann
Summary: ICARUS is an open access infrastructure for storing, sharing, discovering, and utilizing atmospheric chamber data. It supports the evaluation and revision of atmospheric model mechanisms, intercomparison of data and models, and the development of new model frameworks.
ACS EARTH AND SPACE CHEMISTRY
(2023)
Article
Meteorology & Atmospheric Sciences
Katherine R. Travis, James. H. Crawford, Amber J. Soja, Emily M. Gargulinski, Richard H. Moore, Elizabeth B. Wiggins, Glenn S. Diskin, Joshua P. Digangi, John B. Nowak, Hannah Halliday, Robert J. Yokelson, Jessica L. Mccarty, Isobel J. Simpson, Donald R. Blake, Simone Meinardi, Rebecca S. Hornbrook, Eric C. Apel, Alan J. Hills, Carsten Warneke, Matthew M. Coggon, Andrew W. Rollins, Jessica B. Gilman, Caroline C. Womack, Michael A. Robinson, Joseph M. Katich, Jeff Peischl, Georgios I. Gkatzelis, Ilann Bourgeois, Pamela S. Rickly, Aaron Lamplugh, Jack E. Dibb, Jose L. Jimenez, Pedro Campuzano-Jost, Douglas A. Day, Hongyu Guo, Demetrios Pagonis, Paul O. Wennberg, John D. Crounse, Lu Xu, Thomas F. Hanisco, Glenn M. Wolfe, Jin Liao, Jason M. St. Clair, Benjamin A. Nault, Alan Fried, Anne E. Perring
Summary: Agricultural and prescribed burning activities emit significant amounts of trace gases and aerosols. This study presents emission factors and ratios based on the FIREX-AQ campaign in the eastern United States in 2019, focusing on burning of crop residues and prescribed fire fuels. The study shows the importance of specific factors such as combustion efficiency, fuel type, and meteorological conditions in determining the emissions.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2023)
Article
Environmental Sciences
Laura Hyesung Yang, Daniel J. Jacob, Nadia K. Colombi, Shixian Zhai, Kelvin H. Bates, Viral Shah, Ellie Beaudry, Robert M. Yantosca, Haipeng Lin, Jared F. Brewer, Heesung Chong, Katherine R. Travis, James H. Crawford, Lok N. Lamsal, Ja-Ho Koo, Jhoon Kim
Summary: Aircraft observations from the KORUS-AQ campaign suggest that the GEOS-Chem CTM can accurately compute the vertical profiles of NO2, which are influenced by the diurnal variation in mixing depth. This finding helps explain the diurnal variation in NO2 and its implications for air quality.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Environmental Sciences
Pamela S. Rickly, Hongyu Guo, Pedro Campuzano-Jost, Jose L. Jimenez, Glenn M. Wolfe, Ryan Bennett, Ilann Bourgeois, John D. Crounse, Jack E. Dibb, Joshua P. DiGangi, Glenn S. Diskin, Maximilian Dollner, Emily M. Gargulinski, Samuel R. Hall, Hannah S. Halliday, Thomas F. Hanisco, Reem A. Hannun, Jin Liao, Richard Moore, Benjamin A. Nault, John B. Nowak, Jeff Peischl, Claire E. Robinson, Thomas Ryerson, Kevin J. Sanchez, Manuel Schoeberl, Amber J. Soja, Jason M. St Clair, Kenneth L. Thornhill, Kirk Ullmann, Paul O. Wennberg, Bernadett Weinzierl, Elizabeth B. Wiggins, Edward L. Winstead, Andrew W. Rollins
Summary: Fires emit sulfur that affects local air quality and climate. This study analyzes SO2 emission factors from US wildfires and agricultural fires and their relationship to sulfate and HMS formation.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2022)
Article
Meteorology & Atmospheric Sciences
Lu Xu, Matthew M. Coggon, Chelsea E. Stockwell, Jessica B. Gilman, Michael A. Robinson, Martin Breitenlechner, Aaron Lamplugh, John D. Crounse, Paul O. Wennberg, J. Andrew Neuman, Gordon A. Novak, Patrick R. Veres, Steven S. Brown, Carsten Warneke
Summary: We characterized and deployed the NH4+ CIMS technique using a focusing ion-molecule reactor (FIMR) and ammonium-water cluster (NH4+.H2O) as the reagent ion. The NH4+.H2O chemistry proved to be versatile and sensitive for measuring a wide range of oxygenated organic compounds. It offers the possibility to estimate sensitivities for analytes without calibration standards. The NH4+ CIMS was successfully deployed in the RECAP campaign and showed excellent performance in detecting compounds from various chemical classes.
ATMOSPHERIC MEASUREMENT TECHNIQUES
(2022)
Article
Meteorology & Atmospheric Sciences
Matthias Schneider, Benjamin Ertl, Qiansi Tu, Christopher J. Diekmann, Farahnaz Khosrawi, Amelie N. Roehling, Frank Hase, Darko Dubravica, Omaira E. Garcia, Eliezer Sepulveda, Tobias Borsdorff, Jochen Landgraf, Alba Lorente, Andre Butz, Huilin Chen, Rigel Kivi, Thomas Laemmel, Michel Ramonet, Cyril Crevoisier, Jerome Pernin, Martin Steinbacher, Frank Meinhardt, Kimberly Strong, Debra Wunch, Thorsten Warneke, Coleen Roehl, Paul O. Wennberg, Isamu Morino, Laura T. Iraci, Kei Shiomi, Nicholas M. Deutscher, David W. T. Griffith, Voltaire A. Velazco, David F. Pollard
Summary: The article presents a method for the synergetic use of IASI profile and TROPOMI total-column level 2 retrieval products, which combines the advantages of thermal infrared and scattered solar radiation observation data. The method is successfully validated for atmospheric methane (CH4) detection, showing reliable results compared to reference data from various measurement stations.
ATMOSPHERIC MEASUREMENT TECHNIQUES
(2022)
Article
Environmental Sciences
Glenn M. Wolfe, Thomas F. Hanisco, Heather L. Arkinson, Donald R. Blake, Armin Wisthaler, Tomas Mikoviny, Thomas B. Ryerson, Ilana Pollack, Jeff Peischl, Paul O. Wennberg, John D. Crounse, Jason M. St. Clair, Alex Teng, L. Gregory Huey, Xiaoxi Liu, Alan Fried, Petter Weibring, Dirk Richter, James Walega, Samuel R. Hall, Kirk Ullmann, Jose L. Jimenez, Pedro Campuzano-Jost, T. Paul Bui, Glenn Diskin, James R. Podolske, Glen Sachse, Ronald C. Cohen
Summary: This study investigates the impact of large wildfires on regional atmospheric composition and reveals the complex chemical processes involved. The research highlights the importance of considering the full range of reactive VOCs and relevant oxidant sources in accurately simulating smoke plume chemistry. The findings also suggest that oxygenated VOC photolysis is a major source of radicals, while HONO amplifies radical cycling and acts as a downwind NOx source.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2022)
Article
Environmental Sciences
Kelvin H. Bates, Guy J. P. Burke, James D. Cope, Tran B. Nguyen
Summary: The reaction of alpha-pinene with NO3 is important for the removal of alpha-pinene and NO3 at night, and it may have significant implications for secondary organic aerosol (SOA) and reactive nitrogen in the atmosphere.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2022)
Article
Geosciences, Multidisciplinary
Thomas E. Taylor, Christopher W. O'Dell, David Crisp, Akhiko Kuze, Hannakaisa Lindqvist, Paul O. Wennberg, Abhishek Chatterjee, Michael Gunson, Annmarie Eldering, Brendan Fisher, Matthaus Kiel, Robert R. Nelson, Aronne Merrelli, Greg Osterman, Frederic Chevallier, Paul Palmer, Liang Feng, Nicholas M. Deutscher, Manvendra K. Dubey, Dietrich G. Feist, Omaira E. Garcia, David W. T. Griffith, Frank Hase, Laura T. Iraci, Rigel Kivi, Cheng Liu, Martine De Maziere, Isamu Morino, Justus Notholt, Young-Suk Oh, Hirofumi Ohyama, David F. Pollard, Markus Rettinger, Matthias Schneider, Coleen M. Roehl, Mahesh Kumar Sha, Kei Shiomi, Kimberly Strong, Ralf Sussmann, Yao Te, Voltaire A. Velazco, Mihalis Vrekoussis, Thorsten Warneke, Debra Wunch
Summary: This article introduces the estimation of carbon dioxide concentration using TANSO-FTS measurement data and performs bias correction and quality filtering. The test results show that the v9 ACOS GOSAT XCO2 product has improved and is consistent with other measurement data. The use of this dataset can provide valuable reference for carbon cycle research.
EARTH SYSTEM SCIENCE DATA
(2022)
