Investigating local and remote terrestrial influence on air masses at contrasting Antarctic sites using Radon-222 and back trajectories
We report on the first summer of high-sensitivity radon measurementsfrom a two-filter detector at 12Jang Bogo Station(Terra Nova Bay), and contrast them with simultaneousobservations at King 13Sejong Station (King George Island).King Sejong radon concentrations were characteristic of a 14marinebasel...
Published in: | Journal of Geophysical Research: Atmospheres |
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Online Access: | http://hdl.handle.net/11585/615852 https://doi.org/10.1002/2017JD026833 http://onlinelibrary.wiley.com/doi/10.1002/2017JD026833/full |
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ftunibolognairis:oai:cris.unibo.it:11585/615852 2023-09-05T13:14:58+02:00 Investigating local and remote terrestrial influence on air masses at contrasting Antarctic sites using Radon-222 and back trajectories S. D. Chambers T. Choi S. -.J. Park A. G. Williams S. -.B. Hong L. Tositti A. D. Griffiths J. Crawford E. Pereira Chambers, S. D. Choi, T. Park, S. -. J. Williams, A. G. Hong, S. -. B. Tositti, L. Griffiths, A. D. Crawford, J. Pereira, E. 2017 STAMPA http://hdl.handle.net/11585/615852 https://doi.org/10.1002/2017JD026833 http://onlinelibrary.wiley.com/doi/10.1002/2017JD026833/full eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000419950200010 volume:122 issue:24 firstpage:13525 lastpage:13544 numberofpages:20 journal:JOURNAL OF GEOPHYSICAL RESEARCH. ATMOSPHERES http://hdl.handle.net/11585/615852 doi:10.1002/2017JD026833 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85039150884 http://onlinelibrary.wiley.com/doi/10.1002/2017JD026833/full Radon-222 Antarctica back-trajectories air masses classification info:eu-repo/semantics/article 2017 ftunibolognairis https://doi.org/10.1002/2017JD026833 2023-08-21T20:51:37Z We report on the first summer of high-sensitivity radon measurementsfrom a two-filter detector at 12Jang Bogo Station(Terra Nova Bay), and contrast them with simultaneousobservations at King 13Sejong Station (King George Island).King Sejong radon concentrations were characteristic of a 14marinebaseline station (0.02 –0.3 Bq m-3), whereas Jang Bogo values were highly variable (0.06 –155.2 Bq m-3), mainlydue toemissions from exposed coastal ground(estimated mean flux 0.09–0.1116atoms cm-2s-1)and shallow atmospheric mixing depths.For wind speeds of ≤3.5 m s-1the influence 17of local radon emissions became increasingly more prominent at both sites. A cluster analysis of 18back trajectories from King Sejong (62S) revealed a fairly even distribution between air masses that 19had passed recently over South America, the Southern Ocean and Antarctica, whereasat Jang Bogo 20(75S) 80% of events had recently passed over the Ross Ice Shelf and West Antarctica, 12% were 21synoptically forced over Cape Adare, and 8% were associated with subsidence over the Antarctic 22interior and katabatic flowto the station. When cross-checked againstradonconcentrations, only 23half of the back trajectories ending atJang Bogo that hadindicateddistant contact with non-polar 24southern hemisphere continents within the past 10 days showed actual signs of terrestrial influence.25A simple-to-implement technique based on high-pass filtered absolute humidity is developedto 26distinguish betweenpredominantly katabatic, oceanic and near-coastal airmasses for 27characterisation of trace gas and aerosol measurementsat coastal East Antarctic sites. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Shelf King George Island Ross Ice Shelf Southern Ocean West Antarctica IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) Antarctic Southern Ocean The Antarctic King George Island West Antarctica Terra Nova Bay Ross Ice Shelf Adare ENVELOPE(170.233,170.233,-71.283,-71.283) Cape Adare ENVELOPE(175.000,175.000,-71.000,-71.000) Bogo ENVELOPE(9.783,9.783,63.095,63.095) Journal of Geophysical Research: Atmospheres 122 24 13,525 13,544 |
institution |
Open Polar |
collection |
IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) |
op_collection_id |
ftunibolognairis |
language |
English |
topic |
Radon-222 Antarctica back-trajectories air masses classification |
spellingShingle |
Radon-222 Antarctica back-trajectories air masses classification S. D. Chambers T. Choi S. -.J. Park A. G. Williams S. -.B. Hong L. Tositti A. D. Griffiths J. Crawford E. Pereira Investigating local and remote terrestrial influence on air masses at contrasting Antarctic sites using Radon-222 and back trajectories |
topic_facet |
Radon-222 Antarctica back-trajectories air masses classification |
description |
We report on the first summer of high-sensitivity radon measurementsfrom a two-filter detector at 12Jang Bogo Station(Terra Nova Bay), and contrast them with simultaneousobservations at King 13Sejong Station (King George Island).King Sejong radon concentrations were characteristic of a 14marinebaseline station (0.02 –0.3 Bq m-3), whereas Jang Bogo values were highly variable (0.06 –155.2 Bq m-3), mainlydue toemissions from exposed coastal ground(estimated mean flux 0.09–0.1116atoms cm-2s-1)and shallow atmospheric mixing depths.For wind speeds of ≤3.5 m s-1the influence 17of local radon emissions became increasingly more prominent at both sites. A cluster analysis of 18back trajectories from King Sejong (62S) revealed a fairly even distribution between air masses that 19had passed recently over South America, the Southern Ocean and Antarctica, whereasat Jang Bogo 20(75S) 80% of events had recently passed over the Ross Ice Shelf and West Antarctica, 12% were 21synoptically forced over Cape Adare, and 8% were associated with subsidence over the Antarctic 22interior and katabatic flowto the station. When cross-checked againstradonconcentrations, only 23half of the back trajectories ending atJang Bogo that hadindicateddistant contact with non-polar 24southern hemisphere continents within the past 10 days showed actual signs of terrestrial influence.25A simple-to-implement technique based on high-pass filtered absolute humidity is developedto 26distinguish betweenpredominantly katabatic, oceanic and near-coastal airmasses for 27characterisation of trace gas and aerosol measurementsat coastal East Antarctic sites. |
author2 |
Chambers, S. D. Choi, T. Park, S. -. J. Williams, A. G. Hong, S. -. B. Tositti, L. Griffiths, A. D. Crawford, J. Pereira, E. |
format |
Article in Journal/Newspaper |
author |
S. D. Chambers T. Choi S. -.J. Park A. G. Williams S. -.B. Hong L. Tositti A. D. Griffiths J. Crawford E. Pereira |
author_facet |
S. D. Chambers T. Choi S. -.J. Park A. G. Williams S. -.B. Hong L. Tositti A. D. Griffiths J. Crawford E. Pereira |
author_sort |
S. D. Chambers |
title |
Investigating local and remote terrestrial influence on air masses at contrasting Antarctic sites using Radon-222 and back trajectories |
title_short |
Investigating local and remote terrestrial influence on air masses at contrasting Antarctic sites using Radon-222 and back trajectories |
title_full |
Investigating local and remote terrestrial influence on air masses at contrasting Antarctic sites using Radon-222 and back trajectories |
title_fullStr |
Investigating local and remote terrestrial influence on air masses at contrasting Antarctic sites using Radon-222 and back trajectories |
title_full_unstemmed |
Investigating local and remote terrestrial influence on air masses at contrasting Antarctic sites using Radon-222 and back trajectories |
title_sort |
investigating local and remote terrestrial influence on air masses at contrasting antarctic sites using radon-222 and back trajectories |
publishDate |
2017 |
url |
http://hdl.handle.net/11585/615852 https://doi.org/10.1002/2017JD026833 http://onlinelibrary.wiley.com/doi/10.1002/2017JD026833/full |
long_lat |
ENVELOPE(170.233,170.233,-71.283,-71.283) ENVELOPE(175.000,175.000,-71.000,-71.000) ENVELOPE(9.783,9.783,63.095,63.095) |
geographic |
Antarctic Southern Ocean The Antarctic King George Island West Antarctica Terra Nova Bay Ross Ice Shelf Adare Cape Adare Bogo |
geographic_facet |
Antarctic Southern Ocean The Antarctic King George Island West Antarctica Terra Nova Bay Ross Ice Shelf Adare Cape Adare Bogo |
genre |
Antarc* Antarctic Antarctica Ice Shelf King George Island Ross Ice Shelf Southern Ocean West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Ice Shelf King George Island Ross Ice Shelf Southern Ocean West Antarctica |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000419950200010 volume:122 issue:24 firstpage:13525 lastpage:13544 numberofpages:20 journal:JOURNAL OF GEOPHYSICAL RESEARCH. ATMOSPHERES http://hdl.handle.net/11585/615852 doi:10.1002/2017JD026833 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85039150884 http://onlinelibrary.wiley.com/doi/10.1002/2017JD026833/full |
op_doi |
https://doi.org/10.1002/2017JD026833 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
122 |
container_issue |
24 |
container_start_page |
13,525 |
op_container_end_page |
13,544 |
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1776196820193509376 |