Intermediate ions as a strong indicator of new particle formation bursts in a boreal forest
Secondary aerosol formation from gas-phase precursors is a frequent phenomenon occurring in a boreal environment. Traditionally, this process is identified visually from observational data on total and ion number size distributions. Here, we introduce a new, objective classification method for the n...
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/165318 2024-01-07T09:40:47+01:00 Intermediate ions as a strong indicator of new particle formation bursts in a boreal forest Leino, Katri Nieminen, Tuomo Manninen, Hanna E. Petäjä, Tuukka Kerminen, Veli-Matti Kulmala, Markku Department of Physics Aerosol-Cloud-Climate -Interactions (ACCI) 2016-08-08T09:05:01Z 13 application/pdf http://hdl.handle.net/10138/165318 eng eng Finnish Environment Institute This research was supported by the European Research Council (ERC) Advanced Grant (ATM-NUCLE, 227463), the European Union's Horizon 2020 research and innovation programme under grant agreement no. 654109 (ACTRIS-2), CRAICC project (Cryosphere-Atmosphere Interaction in a Changing Arctic Climate) and the Academy of Finland Centre of Excellence program (projects no. 1118615 and 272041). The research leading to these results has received funding also from the European Union Seventh Framework Programme (FP7/2007-2013 ACTRIS) under grant agreement no. 262254 and European Union's Horizon 2020 research and innovation programme under grant agreement no. 654109 (ACTRIS2). Leino , K , Nieminen , T , Manninen , H E , Petäjä , T , Kerminen , V-M & Kulmala , M 2016 , ' Intermediate ions as a strong indicator of new particle formation bursts in a boreal forest ' , Boreal Environment Research , vol. 21 , no. 3-4 , pp. 274-286 . ORCID: /0000-0002-1881-9044/work/102822671 84970968608 7ec499e2-8ea4-44e7-83d7-703a54a50597 http://hdl.handle.net/10138/165318 000378019700007 other openAccess info:eu-repo/semantics/openAccess AEROSOL-SIZE DISTRIBUTIONS ATMOSPHERIC IONS FORMATION EVENTS GROWTH-RATES SMEAR-II NUCLEATION AIR SPECTROMETER MOBILITY CLUSTERS 114 Physical sciences 1172 Environmental sciences Article publishedVersion 2016 ftunivhelsihelda 2023-12-14T00:09:28Z Secondary aerosol formation from gas-phase precursors is a frequent phenomenon occurring in a boreal environment. Traditionally, this process is identified visually from observational data on total and ion number size distributions. Here, we introduce a new, objective classification method for the new particle formation events based on measured intermediate-ion concentrations. The intermediate-ion concentration is a suitable indicator of new particle formation, because it is linked to the atmospheric new particle formation. The concentration of intermediate ions is typically very low (below 5 cm(-3)) when there is no new particle formation or precipitation events occurring. In this study, we analysed concentrations of negative intermediate ions at the Station for Measuring Ecosystem Atmosphere Relations (SMEAR II) in Hyytiala, Finland, during the years 2003-2013. We found that the half-hour median concentration of negative intermediate ions in sizes 2-4 nm was > 20 cm(-3) during 77.5% of event days classified by traditional method. The corresponding value was 92.3% in the case of 2-7 nm negative ions. In addition, the intermediate-ion concentration varied seasonally in a similar manner as the number of event days, peaking in the spring. A typical diurnal variation of the intermediate-ion concentration resembled that of the particle concentration during the event days. We developed here a new method for classifying new particle formation events based on intermediate-ion concentrations. The new method is complementary to the traditional event analysis and it can also be used as an automatic way of determining new particle formation events from large data sets. Peer reviewed Article in Journal/Newspaper Arctic Boreal Environment Research HELDA – University of Helsinki Open Repository |
institution |
Open Polar |
collection |
HELDA – University of Helsinki Open Repository |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
AEROSOL-SIZE DISTRIBUTIONS ATMOSPHERIC IONS FORMATION EVENTS GROWTH-RATES SMEAR-II NUCLEATION AIR SPECTROMETER MOBILITY CLUSTERS 114 Physical sciences 1172 Environmental sciences |
spellingShingle |
AEROSOL-SIZE DISTRIBUTIONS ATMOSPHERIC IONS FORMATION EVENTS GROWTH-RATES SMEAR-II NUCLEATION AIR SPECTROMETER MOBILITY CLUSTERS 114 Physical sciences 1172 Environmental sciences Leino, Katri Nieminen, Tuomo Manninen, Hanna E. Petäjä, Tuukka Kerminen, Veli-Matti Kulmala, Markku Intermediate ions as a strong indicator of new particle formation bursts in a boreal forest |
topic_facet |
AEROSOL-SIZE DISTRIBUTIONS ATMOSPHERIC IONS FORMATION EVENTS GROWTH-RATES SMEAR-II NUCLEATION AIR SPECTROMETER MOBILITY CLUSTERS 114 Physical sciences 1172 Environmental sciences |
description |
Secondary aerosol formation from gas-phase precursors is a frequent phenomenon occurring in a boreal environment. Traditionally, this process is identified visually from observational data on total and ion number size distributions. Here, we introduce a new, objective classification method for the new particle formation events based on measured intermediate-ion concentrations. The intermediate-ion concentration is a suitable indicator of new particle formation, because it is linked to the atmospheric new particle formation. The concentration of intermediate ions is typically very low (below 5 cm(-3)) when there is no new particle formation or precipitation events occurring. In this study, we analysed concentrations of negative intermediate ions at the Station for Measuring Ecosystem Atmosphere Relations (SMEAR II) in Hyytiala, Finland, during the years 2003-2013. We found that the half-hour median concentration of negative intermediate ions in sizes 2-4 nm was > 20 cm(-3) during 77.5% of event days classified by traditional method. The corresponding value was 92.3% in the case of 2-7 nm negative ions. In addition, the intermediate-ion concentration varied seasonally in a similar manner as the number of event days, peaking in the spring. A typical diurnal variation of the intermediate-ion concentration resembled that of the particle concentration during the event days. We developed here a new method for classifying new particle formation events based on intermediate-ion concentrations. The new method is complementary to the traditional event analysis and it can also be used as an automatic way of determining new particle formation events from large data sets. Peer reviewed |
author2 |
Department of Physics Aerosol-Cloud-Climate -Interactions (ACCI) |
format |
Article in Journal/Newspaper |
author |
Leino, Katri Nieminen, Tuomo Manninen, Hanna E. Petäjä, Tuukka Kerminen, Veli-Matti Kulmala, Markku |
author_facet |
Leino, Katri Nieminen, Tuomo Manninen, Hanna E. Petäjä, Tuukka Kerminen, Veli-Matti Kulmala, Markku |
author_sort |
Leino, Katri |
title |
Intermediate ions as a strong indicator of new particle formation bursts in a boreal forest |
title_short |
Intermediate ions as a strong indicator of new particle formation bursts in a boreal forest |
title_full |
Intermediate ions as a strong indicator of new particle formation bursts in a boreal forest |
title_fullStr |
Intermediate ions as a strong indicator of new particle formation bursts in a boreal forest |
title_full_unstemmed |
Intermediate ions as a strong indicator of new particle formation bursts in a boreal forest |
title_sort |
intermediate ions as a strong indicator of new particle formation bursts in a boreal forest |
publisher |
Finnish Environment Institute |
publishDate |
2016 |
url |
http://hdl.handle.net/10138/165318 |
genre |
Arctic Boreal Environment Research |
genre_facet |
Arctic Boreal Environment Research |
op_relation |
This research was supported by the European Research Council (ERC) Advanced Grant (ATM-NUCLE, 227463), the European Union's Horizon 2020 research and innovation programme under grant agreement no. 654109 (ACTRIS-2), CRAICC project (Cryosphere-Atmosphere Interaction in a Changing Arctic Climate) and the Academy of Finland Centre of Excellence program (projects no. 1118615 and 272041). The research leading to these results has received funding also from the European Union Seventh Framework Programme (FP7/2007-2013 ACTRIS) under grant agreement no. 262254 and European Union's Horizon 2020 research and innovation programme under grant agreement no. 654109 (ACTRIS2). Leino , K , Nieminen , T , Manninen , H E , Petäjä , T , Kerminen , V-M & Kulmala , M 2016 , ' Intermediate ions as a strong indicator of new particle formation bursts in a boreal forest ' , Boreal Environment Research , vol. 21 , no. 3-4 , pp. 274-286 . ORCID: /0000-0002-1881-9044/work/102822671 84970968608 7ec499e2-8ea4-44e7-83d7-703a54a50597 http://hdl.handle.net/10138/165318 000378019700007 |
op_rights |
other openAccess info:eu-repo/semantics/openAccess |
_version_ |
1787421571480027136 |