Characterising terrestrial influences on Antarctic air masses using Radon-222 measurements at King George Island
We report on one year of high-precision direct hourly radon observations at King Sejong Station (King George Island) beginning in February 2013. Findings are compared with historic and ongoing radon measurements from other Antarctic sites. Monthly median concentrations reduced from 72 mBq m −3 in la...
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ftdoajarticles:oai:doaj.org/article:2049f975e6254d1289ac3f2c9a690021 2023-05-15T14:05:29+02:00 Characterising terrestrial influences on Antarctic air masses using Radon-222 measurements at King George Island S. D. Chambers S.-B. Hong A. G. Williams J. Crawford A. D. Griffiths S.-J. Park 2014-09-01T00:00:00Z https://doi.org/10.5194/acp-14-9903-2014 https://doaj.org/article/2049f975e6254d1289ac3f2c9a690021 EN eng Copernicus Publications http://www.atmos-chem-phys.net/14/9903/2014/acp-14-9903-2014.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 doi:10.5194/acp-14-9903-2014 https://doaj.org/article/2049f975e6254d1289ac3f2c9a690021 Atmospheric Chemistry and Physics, Vol 14, Iss 18, Pp 9903-9916 (2014) Physics QC1-999 Chemistry QD1-999 article 2014 ftdoajarticles https://doi.org/10.5194/acp-14-9903-2014 2022-12-31T13:34:03Z We report on one year of high-precision direct hourly radon observations at King Sejong Station (King George Island) beginning in February 2013. Findings are compared with historic and ongoing radon measurements from other Antarctic sites. Monthly median concentrations reduced from 72 mBq m −3 in late-summer to 44 mBq m −3 in late winter and early spring. Monthly 10th percentiles, ranging from 29 to 49 mBq m −3 , were typical of oceanic baseline values. Diurnal cycles were rarely evident and local influences were minor, consistent with regional radon flux estimates one tenth of the global average for ice-free land. The predominant fetch region for terrestrially influenced air masses was South America (47–53° S), with minor influences also attributed to aged Australian air masses and local sources. Plume dilution factors of 2.8–4.0 were estimated for the most terrestrially influenced (South American) air masses, and a seasonal cycle in terrestrial influence on tropospheric air descending at the pole was identified and characterised. Article in Journal/Newspaper Antarc* Antarctic King George Island Directory of Open Access Journals: DOAJ Articles Antarctic King George Island King Sejong Station ENVELOPE(-58.783,-58.783,-62.220,-62.220) Atmospheric Chemistry and Physics 14 18 9903 9916 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
Physics QC1-999 Chemistry QD1-999 S. D. Chambers S.-B. Hong A. G. Williams J. Crawford A. D. Griffiths S.-J. Park Characterising terrestrial influences on Antarctic air masses using Radon-222 measurements at King George Island |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
We report on one year of high-precision direct hourly radon observations at King Sejong Station (King George Island) beginning in February 2013. Findings are compared with historic and ongoing radon measurements from other Antarctic sites. Monthly median concentrations reduced from 72 mBq m −3 in late-summer to 44 mBq m −3 in late winter and early spring. Monthly 10th percentiles, ranging from 29 to 49 mBq m −3 , were typical of oceanic baseline values. Diurnal cycles were rarely evident and local influences were minor, consistent with regional radon flux estimates one tenth of the global average for ice-free land. The predominant fetch region for terrestrially influenced air masses was South America (47–53° S), with minor influences also attributed to aged Australian air masses and local sources. Plume dilution factors of 2.8–4.0 were estimated for the most terrestrially influenced (South American) air masses, and a seasonal cycle in terrestrial influence on tropospheric air descending at the pole was identified and characterised. |
format |
Article in Journal/Newspaper |
author |
S. D. Chambers S.-B. Hong A. G. Williams J. Crawford A. D. Griffiths S.-J. Park |
author_facet |
S. D. Chambers S.-B. Hong A. G. Williams J. Crawford A. D. Griffiths S.-J. Park |
author_sort |
S. D. Chambers |
title |
Characterising terrestrial influences on Antarctic air masses using Radon-222 measurements at King George Island |
title_short |
Characterising terrestrial influences on Antarctic air masses using Radon-222 measurements at King George Island |
title_full |
Characterising terrestrial influences on Antarctic air masses using Radon-222 measurements at King George Island |
title_fullStr |
Characterising terrestrial influences on Antarctic air masses using Radon-222 measurements at King George Island |
title_full_unstemmed |
Characterising terrestrial influences on Antarctic air masses using Radon-222 measurements at King George Island |
title_sort |
characterising terrestrial influences on antarctic air masses using radon-222 measurements at king george island |
publisher |
Copernicus Publications |
publishDate |
2014 |
url |
https://doi.org/10.5194/acp-14-9903-2014 https://doaj.org/article/2049f975e6254d1289ac3f2c9a690021 |
long_lat |
ENVELOPE(-58.783,-58.783,-62.220,-62.220) |
geographic |
Antarctic King George Island King Sejong Station |
geographic_facet |
Antarctic King George Island King Sejong Station |
genre |
Antarc* Antarctic King George Island |
genre_facet |
Antarc* Antarctic King George Island |
op_source |
Atmospheric Chemistry and Physics, Vol 14, Iss 18, Pp 9903-9916 (2014) |
op_relation |
http://www.atmos-chem-phys.net/14/9903/2014/acp-14-9903-2014.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 doi:10.5194/acp-14-9903-2014 https://doaj.org/article/2049f975e6254d1289ac3f2c9a690021 |
op_doi |
https://doi.org/10.5194/acp-14-9903-2014 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
14 |
container_issue |
18 |
container_start_page |
9903 |
op_container_end_page |
9916 |
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1766277392184115200 |