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27 results on '"Hanna Elina Manninen"'

1. Terpene emissions from boreal wetlands can initiate stronger atmospheric new particle formation than boreal forests

Author

Heikki Junninen, Lauri Ahonen, Federico Bianchi, Lauriane Quéléver, Simon Schallhart, Lubna Dada, Hanna Elina Manninen, Katri Leino, Janne Lampilahti, Stephany Buenrostro Mazon, Pekka Rantala, Mari Räty, Jenni Kontkanen, Sara Negri, Diego Aliaga, Olga Garmash, Pavel Alekseychik, Helina Lipp, Kalju Tamme, Janne Levula, Mikko Sipilä, Mikael Ehn, Douglas Worsnop, Sergej Zilitinkevich, Ivan Mammarella, Janne Rinne, Timo Vesala, Tuukka Petäjä, Veli-Matti Kerminen, and Markku Kulmala

Subjects
Geology, QE1-996.5, Environmental sciences, GE1-350
Abstract

Boreal wetlands emit terpenes which initiate atmospheric new particle formation to an even greater degree than is usually seen over boreal forests, according to direct measurements of volatile organic compounds from a Finnish wetland.

Published
2022
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2. Refined classification and characterization of atmospheric new-particle formation events using air ions

Author

Janne Lampilahti, Veli-Matti Kerminen, Hanna Elina Manninen, Markku Kulmala, Robert Chellapermal, Heikki Junninen, Tuukka Petäjä, Stephany Buenrostro Mazon, Pauli Paasonen, Lubna Dada, Aerosol-Cloud-Climate -Interactions (ACCI), INAR Physics, and Institute for Atmospheric and Earth System Research (INAR)

Subjects
Atmospheric Science, 010504 meteorology & atmospheric sciences, Cloud cover, 116 Chemical sciences, 010501 environmental sciences, Atmospheric sciences, 114 Physical sciences, 01 natural sciences, CLOUD CONDENSATION NUCLEI, Ion, SMEAR-II, lcsh:Chemistry, Human health, Time windows, Cloud condensation nuclei, SPECTROMETER, Relative humidity, SIZE DISTRIBUTION DATA, 1172 Environmental sciences, 0105 earth and related environmental sciences, GROWTH-RATES, STATION, NUCLEATION-MODE PARTICLES, lcsh:QC1-999, HYYTIALA, lcsh:QD1-999, 13. Climate action, Environmental science, Classification methods, AEROSOL-PARTICLES, NEUTRAL CLUSTER, lcsh:Physics, Automated method
Abstract

Atmospheric new-particle formation (NPF) is a worldwide-observed phenomenon that affects the human health and the global climate. With a growing network of global atmospheric measurement stations, efforts towards investigating NPF have increased. In this study, we present an automated method to classify days into four categories including NPF events, non-events and two classes in between, which then ensures reproducibility and minimizes the hours spent on manual classification. We applied our automated method to 10 years of data collected at the SMEAR II measurement station in Hyytiälä, southern Finland using a Neutral cluster and Air Ion Spectrometer (NAIS). In contrast to the traditionally applied classification methods, which categorize days into events and non-events and ambiguous days as undefined days, our method is able to classify the undefined days as it accesses the initial steps of NPF at sub-3 nm sizes. Our results show that, on ∼24 % of the days in Hyytiälä, a regional NPF event occurred and was characterized by nice weather and favourable conditions such as a clear sky and low condensation sink. Another class found in Hyytiälä is the transported event class, which seems to be NPF carried horizontally or vertically to our measurement location and it occurred on 17 % of the total studied days. Additionally, we found that an ion burst, wherein the ions apparently fail to grow to larger sizes, occurred on 18 % of the days in Hyytiälä. The transported events and ion bursts were characterized by less favourable ambient conditions than regional NPF events and thus experienced interrupted particle formation or growth. Non-events occurred on 41 % of the days and were characterized by complete cloud cover and high relative humidity. Moreover, for regional NPF events occurring at the measurement site, the method identifies the start time, peak time and end time, which helps us focus on variables within an exact time window to better understand NPF at a process level. Our automated method can be modified to work in other measurement locations where NPF is observed.

Published
2018

3. Supplementary material to 'Molecular understanding of the suppression of new-particle formation by isoprene'

Author

Martin Heinritzi, Lubna Dada, Mario Simon, Dominik Stolzenburg, Andrea C. Wagner, Lukas Fischer, Lauri R. Ahonen, Stavros Amanatidis, Rima Baalbaki, Andrea Baccarini, Paulus S. Bauer, Bernhard Baumgartner, Federico Bianchi, Sophia Brilke, Dexian Chen, Randall Chiu, Antonio Dias, Josef Dommen, Jonathan Duplissy, Henning Finkenzeller, Carla Frege, Claudia Fuchs, Olga Garmash, Hamish Gordon, Manuel Granzin, Imad El Haddad, Xucheng He, Johanna Helm, Victoria Hofbauer, Christopher R. Hoyle, Juha Kangasluoma, Timo Keber, Changhyuk Kim, Andreas Kürten, Houssni Lamkaddam, Janne Lampilahti, Tiia M. Laurila, Chuan Ping Lee, Katrianne Lehtipalo, Markus Leiminger, Huajun Mai, Vladimir Makhmutov, Hanna Elina Manninen, Ruby Marten, Serge Mathot, Roy Lee Mauldin, Bernhard Mentler, Ugo Molteni, Tatjana Müller, Wei Nie, Tuomo Nieminen, Antti Onnela, Eva Partoll, Monica Passananti, Tuukka Petäjä, Joschka Pfeifer, Veronika Pospisilova, Lauriane Quéléver, Matti P. Rissanen, Clémence Rose, Siegfried Schobesberger, Wiebke Scholz, Kay Scholze, Mikko Sipilä, Gerhard Steiner, Yuri Stozhkov, Christian Tauber, Yee Jun Tham, Miguel Vazquez-Pufleau, Annele Virtanen, Alexander L. Vogel, Rainer Volkamer, Robert Wagner, Mingyi Wang, Lena Weitz, Daniela Wimmer, Mao Xiao, Chao Yan, Penglin Ye, Qiaozhi Zha, Xueqin Zhou, Antonio Amorim, Urs Baltensperger, Armin Hansel, Markku Kulmala, António Tomé, Paul M. Winkler, Douglas R. Worsnop, Neil M. Donahue, Jasper Kirkby, and Joachim Curtius

Published
2020

4. Features in air ions measured by an air ion spectrometer (AIS) at Dome C

Author

Hanna Elina Manninen, Angelo Lupi, Christian Lanconelli, Ella-Maria Duplissy, Riikka Väänänen, Aki Virkkula, Vito Vitale, Paolo Grigioni, Xuemeng Chen, Markku Kulmala, Veli-Matti Kerminen, Maurizio Busetto, Massimo Del Guasta, Tuukka Petäjä, Grigioni, P., and Department of Physics

Subjects
Atmospheric Science, 010504 meteorology & atmospheric sciences, Meteorology, FORMATION EVENTS, Nucleation, Analytical chemistry, INTERMEDIATE IONS, 010501 environmental sciences, CHEMICAL-COMPOSITION, 114 Physical sciences, 01 natural sciences, CLOUD CONDENSATION NUCLEI, Ion, lcsh:Chemistry, BOREAL FOREST, Cloud condensation nuclei, NUCLEATION MODE PARTICLES, 0105 earth and related environmental sciences, Range (particle radiation), GROWTH-RATES, ARCTIC BACKGROUND SITE, Ice crystals, AEROSOL-SIZE DISTRIBUTIONS, Chemistry, Charged particle, lcsh:QC1-999, Aerosol, ATMOSPHERIC AEROSOLS, lcsh:QD1-999, 13. Climate action, Particle, lcsh:Physics
Abstract

An air ion spectrometer (AIS) was deployed for the first time at the Concordia station at Dome C (75°06′ S, 123°23′ E; 3220 m a. s. l. ), Antarctica during the period 22 December 2010–16 November 2011 for measuring the number size distribution of air ions. In this work, we present results obtained from this air ion data set together with aerosol particle and meteorological data. The main processes that modify the number size distribution of air ions during the measurement period at this high-altitude site included new particle formation (NPF, observed on 85 days), wind-induced ion formation (observed on 36 days), and ion production and loss associated with cloud/fog formation (observed on 2 days). For the subset of days when none of these processes seemed to operate, the concentrations of cluster ions (0.9–1.9 nm) exhibited a clear seasonality, with high concentrations in the warm months and low concentrations in the cold. Compared to event-free days, days with NPF were observed with higher cluster ion concentrations. A number of NPF events were observed with restricted growth below 10 nm, which were termed as suppressed NPF. There was another distinct feature, namely a simultaneous presence of two or three separate NPF and subsequent growth events, which were named as multi-mode NPF events. Growth rates (GRs) were determined using two methods: the appearance time method and the mode fitting method. The former method seemed to have advantages in characterizing NPF events with a fast GR, whereas the latter method is more suitable when the GR was slow. The formation rate of 2 nm positive ions (J2+) was calculated for all the NPF events for which a GR in the 2–3 nm size range could be determined. On average, J2+ was about 0.014 cm−3 s−1. The ion production in relation to cloud/fog formation in the size range of 8–42 nm seemed to be a unique feature at Dome C, which has not been reported elsewhere. These ions may, however, either be multiply charged particles but detected as singly charged in the AIS, or be produced inside the instrument, due to the breakage of cloud condensation nuclei (CCN), possibly related to the instrumental behaviour under the extremely cold condition. For the wind-induced ion formation, our observations suggest that the ions originated more likely from atmospheric nucleation of vapours released from the snow than from mechanical charging of shattered snow flakes and ice crystals.

Published
2017

5. From boreal forest to mountain top

Author

Jenni Kontkanen, Katrianne Lehtipalo, Juha Pekka Kangasluoma, Hanna Elina Manninen, Emma Järvinen, Jani Pietari Hakala, Ari Laaksonen, Clemence Rose, Karine Sellegri, Eija Asmi, Tuukka Petäjä, and Markku Kulmala

14. Molecular mechanisms behind nocturnal new particle formation

Author

Ismael Kenneth Ortega Colomer, Tanja Suni, Michael Helmut Boy, Tiia Grönholm, Markku Kulmala, Heikki Junninen, Mikael Ehn, Douglas Worsnop, Hanna Elina Manninen, Hanna Tuula Katariina Vehkamäki, Hanele Hakola, Heidi Hellen, Tuomas Valmari, and Hannu Arvela

16. Nucleation Studies within the EUCAARI Project

Author

Veli-Matti Kerminen, Heikki Lihavainen, David Brus, Eija Vartiainen, Mikko Sipilä, Hanna Elina Manninen, Theo Kurtén, Hanna Tuula Katariina Vehkamäki, Ismael Kenneth Ortega Colomer, and Aadu Mirme

18. Formation and growth of atmospheric aerosols: cluster evaporation

Author

Markku Kulmala, Theo Christian Kurten, Hanna Tuula Katariina Vehkamäki, Tuukka Petäjä, Ismael Kenneth Ortega Colomer, Mikael Ehn, Heikki Junninen, Tuomo Nieminen, Katrianne Lehtipalo, Ilona Riipinen, Hanna Elina Manninen, Pauli Johannes Paasonen, Mikko Sipilä, Olli Wilkman, Miikka Dal Maso, Douglas Worsnop, and Veli-Matti Kerminen

26. Prescribed forest burning experiment in June 2009

Author

Aki Olavi Virkkula, Janne Levula, Toivo Pohja, Gerardus De Leeuw, David Schultz, Clements, C., Kukkonen, K., Nikmo, J., Sofiev, M., Pirjola, L., Liisa Kulmala, Jukka Pumpanen, Timo Vesala, Antti-Jussi Kieloaho, Hermanni Aaltonen, Mari Pihlatie, Silja Häme, Hanna Elina Manninen, Heikki Junninen, Tuomo Nieminen, and Markku Kulmala

27. Ion-induced sulfuric acid–ammonia nucleation drives particle formation in coastal Antarctica

Author

Tuija Jokinen, Ella-Maria Duplissy, Markku Kulmala, Juha Kangasluoma, Heikki Junninen, Tuukka Petäjä, Veli-Matti Kerminen, Hanna Elina Manninen, Mikko Sipilä, Jasper Kirkby, Jenni Kontkanen, P. Tisler, Aki Virkkula, Douglas R. Worsnop, Ville Vakkari, INAR Physics, Institute for Atmospheric and Earth System Research (INAR), and Polar and arctic atmospheric research (PANDA)

Subjects
Atmospheric Science, Materials science, 010504 meteorology & atmospheric sciences, Nucleation, Cosmic ray, 010501 environmental sciences, 114 Physical sciences, 01 natural sciences, CONDENSATION, Atmosphere, SOUTH-POLE, MSA, ddc:550, Cloud condensation nuclei, SPECTROMETER, 14. Life underwater, Research Articles, Physics::Atmospheric and Oceanic Physics, 0105 earth and related environmental sciences, SIZE DISTRIBUTIONS, GROWTH-RATES, Multidisciplinary, Condensation, OH, AEROSOL, SciAdv r-articles, COSMIC-RAYS, Trace gas, Aerosol, 13. Climate action, Chemical physics, Particle, H2SO4, Research Article
Abstract

Antarctica is producing atmospheric aerosol of its own from trace gases emitted by the coastal flora and fauna., Formation of new aerosol particles from trace gases is a major source of cloud condensation nuclei (CCN) in the global atmosphere, with potentially large effects on cloud optical properties and Earth’s radiative balance. Controlled laboratory experiments have resolved, in detail, the different nucleation pathways likely responsible for atmospheric new particle formation, yet very little is known from field studies about the molecular steps and compounds involved in different regions of the atmosphere. The scarcity of primary particle sources makes secondary aerosol formation particularly important in the Antarctic atmosphere. Here, we report on the observation of ion-induced nucleation of sulfuric acid and ammonia—a process experimentally investigated by the CERN CLOUD experiment—as a major source of secondary aerosol particles over coastal Antarctica. We further show that measured high sulfuric acid concentrations, exceeding 107 molecules cm−3, are sufficient to explain the observed new particle growth rates. Our findings show that ion-induced nucleation is the dominant particle formation mechanism, implying that galactic cosmic radiation plays a key role in new particle formation in the pristine Antarctic atmosphere.

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