Time marker of Cs-137 fallout maximum in lake sediments of Northwest China
Caesium-137 (Cs-137) has no natural source and is commonly employed in establishing the chronology of recent lake sediments in the Anthropocene epoch. Because of their location in the northern mid-latitude Westerlies circulation region, downwind of the Chernobyl accident and their proximity to the L...
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2020
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Online Access: | http://ir.ieecas.cn/handle/361006/15080 http://ir.ieecas.cn/handle/361006/15081 https://doi.org/10.1016/j.quascirev.2020.106413 |
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ftchinacascieeca:oai:ir.ieecas.cn:361006/15081 2023-06-11T04:12:41+02:00 Time marker of Cs-137 fallout maximum in lake sediments of Northwest China Lan, Jianghu Wang, Tianli Chawchai, Sakonvan Cheng, Peng Zhou, Kang'en Yu, Keke Yan, Dongna Wang, Yaqin Zang, Jingjie Liu, Yujie Tan, Liangcheng Ai, Li Xu, Hai 2020-08-01 http://ir.ieecas.cn/handle/361006/15080 http://ir.ieecas.cn/handle/361006/15081 https://doi.org/10.1016/j.quascirev.2020.106413 英语 eng PERGAMON-ELSEVIER SCIENCE LTD QUATERNARY SCIENCE REVIEWS http://ir.ieecas.cn/handle/361006/15080 http://ir.ieecas.cn/handle/361006/15081 doi:10.1016/j.quascirev.2020.106413 Chronology Radionuclides Recent lake sediment Ice core Anthropocene Central Asia HOLOCENE CLIMATE VARIABILITY TIEN-SHAN MOUNTAINS MUZTAGATA ICE CORE LAST 2000 YEARS LACUSTRINE SEDIMENTS ALTAI MOUNTAINS RESIDENCE TIME CENTRAL-ASIA BLACK-SEA VERTICAL DISTRIBUTIONS Physical Geography Geology Geography Physical Geosciences Multidisciplinary 期刊论文 2020 ftchinacascieeca https://doi.org/10.1016/j.quascirev.2020.106413 2023-05-08T13:24:53Z Caesium-137 (Cs-137) has no natural source and is commonly employed in establishing the chronology of recent lake sediments in the Anthropocene epoch. Because of their location in the northern mid-latitude Westerlies circulation region, downwind of the Chernobyl accident and their proximity to the Lop Nur Chinese Nuclear Testing (CNT) site, lake sediments in NW China record a(137)Cs fallout maximum of global atmospheric thermonuclear weapon tests (GTWT) in 1963-1964 Common Era (CE), with probably local fallout subpeaks due to the Chernobyl accident in 1986 CE and CNT in 1976 CE. This complexity means that the use of Cs-137 fallout maximum in lake sediments as a time marker in NW China is thus far not well constrained, impeding assessment of recent and future changes in paleoclimate and human activities. To identify the Cs-137 time marker and provide a reliable chronology of surface lake sediments for investigating paleoclimatic changes and for defining the Anthropocene epoch in NW China during the last 50-100 years, here we describe chronologies of 6 near-surface sediment cores from NW China based on Cs-137 and Pb-210 activities, and review the chronology of 23 lake sediments and 10 ice cores from NW China and central Asia based on Cs-137, Pb-210, Pu239+240, H-3, Am-241, and beta-activity dating methods, and annual layer counting, as well as Pu-240/Pu-239 isotopic ratios. Based on the potential influence of radioactivity transport from the Chernobyl accident and CNT, and the comparison with deposition records of 26 European lake sediments and 5 Alpine ice cores, we propose that the Cs-137 fallout maximum of lake sediments in NW China and central Asia is primarily attributable to GTWT and that there is no unambiguous evidence to confirm the Chernobyl- and CNT-derived Cs-137 local-fallout subpeaks. Taking into account the approximately one-year delay between injection of Cs-137 into the atmosphere and its incorporation in lake sediment records, we conclude that the Cs-137 fallout maximum in lake sediments of NW ... Report ice core Institute of Earth Environment: IEECAS OpenIR (Chinese Academy of Sciences) Quaternary Science Reviews 241 106413 |
institution |
Open Polar |
collection |
Institute of Earth Environment: IEECAS OpenIR (Chinese Academy of Sciences) |
op_collection_id |
ftchinacascieeca |
language |
English |
topic |
Chronology Radionuclides Recent lake sediment Ice core Anthropocene Central Asia HOLOCENE CLIMATE VARIABILITY TIEN-SHAN MOUNTAINS MUZTAGATA ICE CORE LAST 2000 YEARS LACUSTRINE SEDIMENTS ALTAI MOUNTAINS RESIDENCE TIME CENTRAL-ASIA BLACK-SEA VERTICAL DISTRIBUTIONS Physical Geography Geology Geography Physical Geosciences Multidisciplinary |
spellingShingle |
Chronology Radionuclides Recent lake sediment Ice core Anthropocene Central Asia HOLOCENE CLIMATE VARIABILITY TIEN-SHAN MOUNTAINS MUZTAGATA ICE CORE LAST 2000 YEARS LACUSTRINE SEDIMENTS ALTAI MOUNTAINS RESIDENCE TIME CENTRAL-ASIA BLACK-SEA VERTICAL DISTRIBUTIONS Physical Geography Geology Geography Physical Geosciences Multidisciplinary Lan, Jianghu Wang, Tianli Chawchai, Sakonvan Cheng, Peng Zhou, Kang'en Yu, Keke Yan, Dongna Wang, Yaqin Zang, Jingjie Liu, Yujie Tan, Liangcheng Ai, Li Xu, Hai Time marker of Cs-137 fallout maximum in lake sediments of Northwest China |
topic_facet |
Chronology Radionuclides Recent lake sediment Ice core Anthropocene Central Asia HOLOCENE CLIMATE VARIABILITY TIEN-SHAN MOUNTAINS MUZTAGATA ICE CORE LAST 2000 YEARS LACUSTRINE SEDIMENTS ALTAI MOUNTAINS RESIDENCE TIME CENTRAL-ASIA BLACK-SEA VERTICAL DISTRIBUTIONS Physical Geography Geology Geography Physical Geosciences Multidisciplinary |
description |
Caesium-137 (Cs-137) has no natural source and is commonly employed in establishing the chronology of recent lake sediments in the Anthropocene epoch. Because of their location in the northern mid-latitude Westerlies circulation region, downwind of the Chernobyl accident and their proximity to the Lop Nur Chinese Nuclear Testing (CNT) site, lake sediments in NW China record a(137)Cs fallout maximum of global atmospheric thermonuclear weapon tests (GTWT) in 1963-1964 Common Era (CE), with probably local fallout subpeaks due to the Chernobyl accident in 1986 CE and CNT in 1976 CE. This complexity means that the use of Cs-137 fallout maximum in lake sediments as a time marker in NW China is thus far not well constrained, impeding assessment of recent and future changes in paleoclimate and human activities. To identify the Cs-137 time marker and provide a reliable chronology of surface lake sediments for investigating paleoclimatic changes and for defining the Anthropocene epoch in NW China during the last 50-100 years, here we describe chronologies of 6 near-surface sediment cores from NW China based on Cs-137 and Pb-210 activities, and review the chronology of 23 lake sediments and 10 ice cores from NW China and central Asia based on Cs-137, Pb-210, Pu239+240, H-3, Am-241, and beta-activity dating methods, and annual layer counting, as well as Pu-240/Pu-239 isotopic ratios. Based on the potential influence of radioactivity transport from the Chernobyl accident and CNT, and the comparison with deposition records of 26 European lake sediments and 5 Alpine ice cores, we propose that the Cs-137 fallout maximum of lake sediments in NW China and central Asia is primarily attributable to GTWT and that there is no unambiguous evidence to confirm the Chernobyl- and CNT-derived Cs-137 local-fallout subpeaks. Taking into account the approximately one-year delay between injection of Cs-137 into the atmosphere and its incorporation in lake sediment records, we conclude that the Cs-137 fallout maximum in lake sediments of NW ... |
format |
Report |
author |
Lan, Jianghu Wang, Tianli Chawchai, Sakonvan Cheng, Peng Zhou, Kang'en Yu, Keke Yan, Dongna Wang, Yaqin Zang, Jingjie Liu, Yujie Tan, Liangcheng Ai, Li Xu, Hai |
author_facet |
Lan, Jianghu Wang, Tianli Chawchai, Sakonvan Cheng, Peng Zhou, Kang'en Yu, Keke Yan, Dongna Wang, Yaqin Zang, Jingjie Liu, Yujie Tan, Liangcheng Ai, Li Xu, Hai |
author_sort |
Lan, Jianghu |
title |
Time marker of Cs-137 fallout maximum in lake sediments of Northwest China |
title_short |
Time marker of Cs-137 fallout maximum in lake sediments of Northwest China |
title_full |
Time marker of Cs-137 fallout maximum in lake sediments of Northwest China |
title_fullStr |
Time marker of Cs-137 fallout maximum in lake sediments of Northwest China |
title_full_unstemmed |
Time marker of Cs-137 fallout maximum in lake sediments of Northwest China |
title_sort |
time marker of cs-137 fallout maximum in lake sediments of northwest china |
publisher |
PERGAMON-ELSEVIER SCIENCE LTD |
publishDate |
2020 |
url |
http://ir.ieecas.cn/handle/361006/15080 http://ir.ieecas.cn/handle/361006/15081 https://doi.org/10.1016/j.quascirev.2020.106413 |
genre |
ice core |
genre_facet |
ice core |
op_relation |
QUATERNARY SCIENCE REVIEWS http://ir.ieecas.cn/handle/361006/15080 http://ir.ieecas.cn/handle/361006/15081 doi:10.1016/j.quascirev.2020.106413 |
op_doi |
https://doi.org/10.1016/j.quascirev.2020.106413 |
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Quaternary Science Reviews |
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241 |
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106413 |
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1768388713646129152 |