239,240Pu and 236U records of an ice core from the eastern Tien Shan (Central Asia)
Radioisotopes (239Pu, 240Pu, 236U) formed during atmospheric nuclear weapons testing (NWT) can be used for dating and therefore be applied as markers of the beginning of the Anthropocene Epoch. Moreover, 240Pu/239Pu ratios enable source identification (general fallout, local emission sources). Ice c...
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Cambridge University Press
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ftdoajarticles:oai:doaj.org/article:a2fed532982c42fc908222730b6a03e5 2023-05-15T16:38:45+02:00 239,240Pu and 236U records of an ice core from the eastern Tien Shan (Central Asia) CHAOMIN WANG SHUGUI HOU HONGXI PANG YAPING LIU HEINZ WALTER GÄGGELER MARCUS CHRISTL HANS-ARNO SYNAL 2017-10-01T00:00:00Z https://doi.org/10.1017/jog.2017.59 https://doaj.org/article/a2fed532982c42fc908222730b6a03e5 EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143017000594/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2017.59 0022-1430 1727-5652 https://doaj.org/article/a2fed532982c42fc908222730b6a03e5 Journal of Glaciology, Vol 63, Pp 929-935 (2017) glacier chemistry ice core mountain glaciers Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2017 ftdoajarticles https://doi.org/10.1017/jog.2017.59 2023-03-12T01:30:59Z Radioisotopes (239Pu, 240Pu, 236U) formed during atmospheric nuclear weapons testing (NWT) can be used for dating and therefore be applied as markers of the beginning of the Anthropocene Epoch. Moreover, 240Pu/239Pu ratios enable source identification (general fallout, local emission sources). Ice core segments from a 57.6 m ice core to bedrock from eastern Tien Shan, China were selected for 239,240Pu and 236U analyses by using compact low-energy accelerator mass spectrometry. The observed 240Pu/239Pu atom ratios were 0.18 ± 0.02, with one exception, indicating global fallout. No evidence for emissions from the nearby local sources Lop Nor was observed. The total deposition rates during NWT for 239Pu and 240Pu amount to 1.55 × 109 atoms·cm−2 and 3.1 × 108 atoms·cm−2, respectively. With the higher undisturbed fallout of 239Pu compared with values reported for glaciers from European Alps at Col du Dome and Colle Gnifetti as well as from the polar region, the eastern Tien Shan glacier would be an ideal site for defining the start of the Anthropocene. 236U is a rather new environmental tracer, while little is known about its global fallout from NWT. The observed deposition flux of 236U during NWT amounts to 3.5 × 108 atoms·cm−2 at the drill site. The average 236U/239Pu ratio of 0.27 ± 0.09 is in good agreement with literature values from global fallout. Article in Journal/Newspaper ice core Journal of Glaciology Directory of Open Access Journals: DOAJ Articles Core Mountain ENVELOPE(-127.187,-127.187,53.466,53.466) Journal of Glaciology 63 241 929 935 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
glacier chemistry ice core mountain glaciers Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
glacier chemistry ice core mountain glaciers Environmental sciences GE1-350 Meteorology. Climatology QC851-999 CHAOMIN WANG SHUGUI HOU HONGXI PANG YAPING LIU HEINZ WALTER GÄGGELER MARCUS CHRISTL HANS-ARNO SYNAL 239,240Pu and 236U records of an ice core from the eastern Tien Shan (Central Asia) |
topic_facet |
glacier chemistry ice core mountain glaciers Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
Radioisotopes (239Pu, 240Pu, 236U) formed during atmospheric nuclear weapons testing (NWT) can be used for dating and therefore be applied as markers of the beginning of the Anthropocene Epoch. Moreover, 240Pu/239Pu ratios enable source identification (general fallout, local emission sources). Ice core segments from a 57.6 m ice core to bedrock from eastern Tien Shan, China were selected for 239,240Pu and 236U analyses by using compact low-energy accelerator mass spectrometry. The observed 240Pu/239Pu atom ratios were 0.18 ± 0.02, with one exception, indicating global fallout. No evidence for emissions from the nearby local sources Lop Nor was observed. The total deposition rates during NWT for 239Pu and 240Pu amount to 1.55 × 109 atoms·cm−2 and 3.1 × 108 atoms·cm−2, respectively. With the higher undisturbed fallout of 239Pu compared with values reported for glaciers from European Alps at Col du Dome and Colle Gnifetti as well as from the polar region, the eastern Tien Shan glacier would be an ideal site for defining the start of the Anthropocene. 236U is a rather new environmental tracer, while little is known about its global fallout from NWT. The observed deposition flux of 236U during NWT amounts to 3.5 × 108 atoms·cm−2 at the drill site. The average 236U/239Pu ratio of 0.27 ± 0.09 is in good agreement with literature values from global fallout. |
format |
Article in Journal/Newspaper |
author |
CHAOMIN WANG SHUGUI HOU HONGXI PANG YAPING LIU HEINZ WALTER GÄGGELER MARCUS CHRISTL HANS-ARNO SYNAL |
author_facet |
CHAOMIN WANG SHUGUI HOU HONGXI PANG YAPING LIU HEINZ WALTER GÄGGELER MARCUS CHRISTL HANS-ARNO SYNAL |
author_sort |
CHAOMIN WANG |
title |
239,240Pu and 236U records of an ice core from the eastern Tien Shan (Central Asia) |
title_short |
239,240Pu and 236U records of an ice core from the eastern Tien Shan (Central Asia) |
title_full |
239,240Pu and 236U records of an ice core from the eastern Tien Shan (Central Asia) |
title_fullStr |
239,240Pu and 236U records of an ice core from the eastern Tien Shan (Central Asia) |
title_full_unstemmed |
239,240Pu and 236U records of an ice core from the eastern Tien Shan (Central Asia) |
title_sort |
239,240pu and 236u records of an ice core from the eastern tien shan (central asia) |
publisher |
Cambridge University Press |
publishDate |
2017 |
url |
https://doi.org/10.1017/jog.2017.59 https://doaj.org/article/a2fed532982c42fc908222730b6a03e5 |
long_lat |
ENVELOPE(-127.187,-127.187,53.466,53.466) |
geographic |
Core Mountain |
geographic_facet |
Core Mountain |
genre |
ice core Journal of Glaciology |
genre_facet |
ice core Journal of Glaciology |
op_source |
Journal of Glaciology, Vol 63, Pp 929-935 (2017) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143017000594/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2017.59 0022-1430 1727-5652 https://doaj.org/article/a2fed532982c42fc908222730b6a03e5 |
op_doi |
https://doi.org/10.1017/jog.2017.59 |
container_title |
Journal of Glaciology |
container_volume |
63 |
container_issue |
241 |
container_start_page |
929 |
op_container_end_page |
935 |
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1766029080677842944 |