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 (750-60 S, 123-230 E; 3220ma: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 t...
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ftenea:oai:iris.enea.it:20.500.12079/1472 2024-04-21T07:51:45+00:00 Features in air ions measured by an air ion spectrometer (AIS) at Dome C Grigioni, P. Grigioni, P. 2017 https://hdl.handle.net/20.500.12079/1472 https://doi.org/10.5194/acp-17-13783-2017 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85034658030&doi=10.5194%2facp-17-13783-2017&partnerID=40&md5=1787870352bb85b251c631d46be0bbad en eng Copernicus GmbH volume:17 issue:22 numberofpages:13783 - 13800 journal:ATMOSPHERIC CHEMISTRY AND PHYSICS http://hdl.handle.net/20.500.12079/1472 doi:10.5194/acp-17-13783-2017 info:eu-repo/semantics/altIdentifier/scopus/Scopus ID: 2-s2.0-85034658030 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85034658030&doi=10.5194%2facp-17-13783-2017&partnerID=40&md5=1787870352bb85b251c631d46be0bbad info:eu-repo/semantics/article 2017 ftenea https://doi.org/20.500.12079/147210.5194/acp-17-13783-2017 2024-03-27T15:05:15Z An air ion spectrometer (AIS) was deployed for the first time at the Concordia station at Dome C (750-60 S, 123-230 E; 3220ma: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 (JC 2 ) was calculated for all the NPF events for which a GR in the 2-3 nm size range could be determined. On average, JC 2 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 ... Article in Journal/Newspaper Antarc* Antarctica ENEA-IRIS Open Archive (Agenzia nazionale per le nuove tecnologie, l'energia e lo sviluppo economico sostenibile) Atmospheric Chemistry and Physics 17 22 13783 13800 |
institution |
Open Polar |
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ENEA-IRIS Open Archive (Agenzia nazionale per le nuove tecnologie, l'energia e lo sviluppo economico sostenibile) |
op_collection_id |
ftenea |
language |
English |
description |
An air ion spectrometer (AIS) was deployed for the first time at the Concordia station at Dome C (750-60 S, 123-230 E; 3220ma: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 (JC 2 ) was calculated for all the NPF events for which a GR in the 2-3 nm size range could be determined. On average, JC 2 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 ... |
author2 |
Grigioni, P. |
format |
Article in Journal/Newspaper |
author |
Grigioni, P. |
spellingShingle |
Grigioni, P. Features in air ions measured by an air ion spectrometer (AIS) at Dome C |
author_facet |
Grigioni, P. |
author_sort |
Grigioni, P. |
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 |
publisher |
Copernicus GmbH |
publishDate |
2017 |
url |
https://hdl.handle.net/20.500.12079/1472 https://doi.org/10.5194/acp-17-13783-2017 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85034658030&doi=10.5194%2facp-17-13783-2017&partnerID=40&md5=1787870352bb85b251c631d46be0bbad |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
volume:17 issue:22 numberofpages:13783 - 13800 journal:ATMOSPHERIC CHEMISTRY AND PHYSICS http://hdl.handle.net/20.500.12079/1472 doi:10.5194/acp-17-13783-2017 info:eu-repo/semantics/altIdentifier/scopus/Scopus ID: 2-s2.0-85034658030 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85034658030&doi=10.5194%2facp-17-13783-2017&partnerID=40&md5=1787870352bb85b251c631d46be0bbad |
op_doi |
https://doi.org/20.500.12079/147210.5194/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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13783 |
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13800 |
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1796935058766954496 |