Features in air ions measured by an air ion spectrometer (AIS) at Dome C
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 f...
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ftcern:oai:inspirehep.net:1675163 2024-09-15T17:46:16+00:00 Features in air ions measured by an air ion spectrometer (AIS) at Dome C Chen, Xuemeng Virkkula, Aki Kerminen, Veli-Matti Manninen, Hanna E Busetto, Maurizio Lanconelli, Christian Lupi, Angelo Vitale, Vito Del Guasta, Massimo Grigioni, Paolo Väänänen, Riikka Duplissy, Ella-Maria Petäjä, Tuukka Kulmala, Markku 2017 https://doi.org/10.5194/acp-17-13783-2017 http://cds.cern.ch/record/2320714 eng eng doi:10.5194/acp-17-13783-2017 http://cds.cern.ch/record/2320714 oai:inspirehep.net:1675163 Other 2017 ftcern https://doi.org/10.5194/acp-17-13783-2017 2024-07-22T15:39:44Z 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 ... Other/Unknown Material Antarc* Antarctica CERN Document Server (CDS) Atmospheric Chemistry and Physics 17 22 13783 13800 |
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Other Chen, Xuemeng Virkkula, Aki Kerminen, Veli-Matti Manninen, Hanna E Busetto, Maurizio Lanconelli, Christian Lupi, Angelo Vitale, Vito Del Guasta, Massimo Grigioni, Paolo Väänänen, Riikka Duplissy, Ella-Maria Petäjä, Tuukka Kulmala, Markku Features in air ions measured by an air ion spectrometer (AIS) at Dome C |
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description |
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 ... |
author |
Chen, Xuemeng Virkkula, Aki Kerminen, Veli-Matti Manninen, Hanna E Busetto, Maurizio Lanconelli, Christian Lupi, Angelo Vitale, Vito Del Guasta, Massimo Grigioni, Paolo Väänänen, Riikka Duplissy, Ella-Maria Petäjä, Tuukka Kulmala, Markku |
author_facet |
Chen, Xuemeng Virkkula, Aki Kerminen, Veli-Matti Manninen, Hanna E Busetto, Maurizio Lanconelli, Christian Lupi, Angelo Vitale, Vito Del Guasta, Massimo Grigioni, Paolo Väänänen, Riikka Duplissy, Ella-Maria Petäjä, Tuukka Kulmala, Markku |
author_sort |
Chen, Xuemeng |
title |
Features in air ions measured by an air ion spectrometer (AIS) at Dome C |
title_short |
Features in air ions measured by an air ion spectrometer (AIS) at Dome C |
title_full |
Features in air ions measured by an air ion spectrometer (AIS) at Dome C |
title_fullStr |
Features in air ions measured by an air ion spectrometer (AIS) at Dome C |
title_full_unstemmed |
Features in air ions measured by an air ion spectrometer (AIS) at Dome C |
title_sort |
features in air ions measured by an air ion spectrometer (ais) at dome c |
publishDate |
2017 |
url |
https://doi.org/10.5194/acp-17-13783-2017 http://cds.cern.ch/record/2320714 |
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Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
doi:10.5194/acp-17-13783-2017 http://cds.cern.ch/record/2320714 oai:inspirehep.net:1675163 |
op_doi |
https://doi.org/10.5194/acp-17-13783-2017 |
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Atmospheric Chemistry and Physics |
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17 |
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22 |
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1810494267590705152 |