Distribution and fall-out of 137Cs and other radionuclides over Antarctica
Abstract This article aims to give a comprehensive view of the distribution patterns for natural and artifical radionuclides over Antarctica. We focus this study on 137 Cs, 210 Pb and tritium. Applying various statistical methods, we show that the deposition of radionuclides reveals a structured dis...
Published in: | Journal of Glaciology |
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Cambridge University Press (CUP)
1997
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Online Access: | http://dx.doi.org/10.1017/s0022143000035024 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000035024 |
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crcambridgeupr:10.1017/s0022143000035024 2024-03-03T08:38:48+00:00 Distribution and fall-out of 137Cs and other radionuclides over Antarctica Pourchet, M. Bartarya, S. K. Maignan, M. Jouzel, J. Pinglot, J. F. Aristarain, A.J. Furdada, G. Kotlyakov, V. M. Mosley-Thompson, E. Preiss, N. Young, N.W. 1997 http://dx.doi.org/10.1017/s0022143000035024 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000035024 en eng Cambridge University Press (CUP) Journal of Glaciology volume 43, issue 145, page 435-445 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1997 crcambridgeupr https://doi.org/10.1017/s0022143000035024 2024-02-08T08:41:37Z Abstract This article aims to give a comprehensive view of the distribution patterns for natural and artifical radionuclides over Antarctica. We focus this study on 137 Cs, 210 Pb and tritium. Applying various statistical methods, we show that the deposition of radionuclides reveals a structured distribution, although local drift redistribution and the snow-surface roughness disturb the representativeness of samples and produce a “noise” effect. The deposition of 137 Cs over Antarctica (885 TBq) represents 0.09% of the total deposition of this radionuclide in the world and the correlation between 137 Cs fluxes and accumulation shows two sub-populations. For the stations with a mean annual temperature above −21° C, a strong correlation is found, whereas the correlation is lower for locations with temperatures below −21° C. The flux of 210 Pb varies from 0.9 to 8.2 Bq m −1 a − 1 with values strongly correlated with the accumulation and a well-defined spatial structure. The same mechanism governs the deposition of artificial and natural tritium but it clearly differs from that of other radionuclides associated with particulate material. The “dry fall-out” accounts for between 60 and 80% of the total fall-out for the artificial radionuclides and around 40% for 210 Pb. This difference is likely related to a tropospheric fraction for 210 Pb. Despite its isolated location, the radioactive fall-out of artificial long-lived radionuclides over Antarctica has been ten times greater than for natural radionuclides. Article in Journal/Newspaper Antarc* Antarctica Journal of Glaciology Cambridge University Press Journal of Glaciology 43 145 435 445 |
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Open Polar |
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Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Pourchet, M. Bartarya, S. K. Maignan, M. Jouzel, J. Pinglot, J. F. Aristarain, A.J. Furdada, G. Kotlyakov, V. M. Mosley-Thompson, E. Preiss, N. Young, N.W. Distribution and fall-out of 137Cs and other radionuclides over Antarctica |
topic_facet |
Earth-Surface Processes |
description |
Abstract This article aims to give a comprehensive view of the distribution patterns for natural and artifical radionuclides over Antarctica. We focus this study on 137 Cs, 210 Pb and tritium. Applying various statistical methods, we show that the deposition of radionuclides reveals a structured distribution, although local drift redistribution and the snow-surface roughness disturb the representativeness of samples and produce a “noise” effect. The deposition of 137 Cs over Antarctica (885 TBq) represents 0.09% of the total deposition of this radionuclide in the world and the correlation between 137 Cs fluxes and accumulation shows two sub-populations. For the stations with a mean annual temperature above −21° C, a strong correlation is found, whereas the correlation is lower for locations with temperatures below −21° C. The flux of 210 Pb varies from 0.9 to 8.2 Bq m −1 a − 1 with values strongly correlated with the accumulation and a well-defined spatial structure. The same mechanism governs the deposition of artificial and natural tritium but it clearly differs from that of other radionuclides associated with particulate material. The “dry fall-out” accounts for between 60 and 80% of the total fall-out for the artificial radionuclides and around 40% for 210 Pb. This difference is likely related to a tropospheric fraction for 210 Pb. Despite its isolated location, the radioactive fall-out of artificial long-lived radionuclides over Antarctica has been ten times greater than for natural radionuclides. |
format |
Article in Journal/Newspaper |
author |
Pourchet, M. Bartarya, S. K. Maignan, M. Jouzel, J. Pinglot, J. F. Aristarain, A.J. Furdada, G. Kotlyakov, V. M. Mosley-Thompson, E. Preiss, N. Young, N.W. |
author_facet |
Pourchet, M. Bartarya, S. K. Maignan, M. Jouzel, J. Pinglot, J. F. Aristarain, A.J. Furdada, G. Kotlyakov, V. M. Mosley-Thompson, E. Preiss, N. Young, N.W. |
author_sort |
Pourchet, M. |
title |
Distribution and fall-out of 137Cs and other radionuclides over Antarctica |
title_short |
Distribution and fall-out of 137Cs and other radionuclides over Antarctica |
title_full |
Distribution and fall-out of 137Cs and other radionuclides over Antarctica |
title_fullStr |
Distribution and fall-out of 137Cs and other radionuclides over Antarctica |
title_full_unstemmed |
Distribution and fall-out of 137Cs and other radionuclides over Antarctica |
title_sort |
distribution and fall-out of 137cs and other radionuclides over antarctica |
publisher |
Cambridge University Press (CUP) |
publishDate |
1997 |
url |
http://dx.doi.org/10.1017/s0022143000035024 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000035024 |
genre |
Antarc* Antarctica Journal of Glaciology |
genre_facet |
Antarc* Antarctica Journal of Glaciology |
op_source |
Journal of Glaciology volume 43, issue 145, page 435-445 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000035024 |
container_title |
Journal of Glaciology |
container_volume |
43 |
container_issue |
145 |
container_start_page |
435 |
op_container_end_page |
445 |
_version_ |
1792507247286288384 |