Abstrakti
Highly oxygenated organic molecules (HOM) are formed in the atmosphere via autoxidation involving peroxy radicals arising from volatile organic compounds (VOC). HOM condense on pre-existing particles and can be involved in new particle formation. HOM thus contribute to the formation of secondary organic aerosol (SOA), a significant and ubiquitous component of atmospheric aerosol known to affect the Earth's radiation balance. HOM were discovered only very recently, but the interest in these compounds has grown rapidly. In this Review, we define HOM and describe the currently available techniques for their identification/quantification, followed by a summary of the current knowledge on their formation mechanisms and physicochemical properties. A main aim is to provide a common frame for the currently quite fragmented literature on HOM studies. Finally, we highlight the existing gaps in our understanding and suggest directions for future HOM research.
| Alkuperäiskieli | Englanti |
|---|---|
| Sivut | 3472-3509 |
| Sivumäärä | 38 |
| Julkaisu | Chemical Reviews |
| Vuosikerta | 119 |
| Numero | 6 |
| DOI - pysyväislinkit | |
| Tila | Julkaistu - 27 maalisk. 2019 |
| Julkaistu ulkoisesti | Kyllä |
| OKM-julkaisutyyppi | A2 Katsausartikkeli tieteellisessä aikakauslehdessä |
Rahoitus
Federico Bianchi, born in Bergamo, Italy, in 1984, graduated in chemistry from University of Milan. After working for four years as a Marie Curie student at the CLOUD project in CERN and at the Paul Scherrer Institute, he received his Ph.D. in atmospheric chemistry from the Eidgenössische Technische Hochschule (ETH) Zürich (2014). In 2015, he took his postdoc at the University of Helsinki, and in 2016 he was awarded with the Postdoc.Mobility fellowships given by the Swiss National Science Foundation. In 2017, he received the Arne Richter Award for Outstanding Early Career Scientists given by the European Geosciences Union. After being awarded with an Academy of Finland Postdoctoral Researchers, he was appointed as Assistant Professor on atmosphere and cryosphere interactions at the University of Helsinki. His research interests are the formation of new particles in several environments, from pristine free troposphere to polluted megacities. Heikki Junninen, Senior Research Fellow, Ph.D., has a long history in atmospheric sciences. He graduated in environmental chemistry from the University of Kuopio (2001) and received his Ph.D. in physics at the University of Helsinki (2014). He has expertise on aerosol and mass spectrometric instrumentation, software development, and statistical modelling. He is leading the development of software package for mass spectrometry data analysis and data management software for environmental stations. He was awarded by Estonian Research Council with a Top Scientist Grant on “Chemical composition and interactions in atmosphere: from gases to aerosols and climate change” (2017), now acting as a Senior Research Fellow and a group leader at the University of Tartu, Institute of Physics. He has educated three Master and two Bachelor students and is currently supervising three Doctoral students and one Masters student. He has published 133 peer reviewed papers (Nature 6, Science 4), h-factor 43, and has 6534 citations. He is highly cited scientist (Clarivate Analytics, 2018) and owns six patents and three nonpatented invention reports. Mikael Ehn, born in Vaasa, Finland, in 1980, graduated in Physics from the University of Helsinki in 2005 and received his Ph.D. in aerosol physics from the same institution in 2010 under the supervision of Professor Markku Kulmala. After two years as a postdoc at the Research Center Jülich, Germany, with Dr. Thomas Mentel, he was appointed University Lecturer in physics in 2013 and Associate Professor (tenure track) in 2016, at the University of Helsinki. In 2014, he received a European Research Council Starting Grant and in 2018 an Academy of Finland Research Fellowship. His current research focuses on processes leading from volatile organic emissions to low-volatile vapors and secondary organic aerosol, primarily utilizing various mass spectrometric techniques. We thank Ugo Molteni, Liine Heikkinen, Rasmus V. Otkjær, and Kristian H. Møller for useful discussion. We thank the CSC Centre for Scientific Computing in Finland and the Danish Center for Scientific Computing from the Copenhagen University. We also thank the Center for Exploitation of Solar Energy founded by the University of Copenhagen, the Swedish Strategic Research Program MERGE, and the European Regional Development Fund (project MOBTT42). This research has received funding from the Swiss National Science Foundation (P2EZP2_168787), the Academy of Finland (grant no. 1315203, 266388 and 299574), the U.S. National Science Foundation (grant nos. AGS 1801897, ACS 1508526), the U.S. Department of Energy’s Office of Science (grant no. DESC0018221), and the European Research Council starting grant COALA (grant no. 638703).
!!ASJC Scopus subject areas
- Yleinen kemia