Han, Yongming;
An, Zhisheng;
Lei, Dewen;
Zhou, Weijian;
Zhang, Luyuan;
Zhao, Xue;
Yan, Dongna;
... Dusek, Ulrike; + view all
(2023)
The Sihailongwan Maar Lake, northeastern China as a candidate Global Boundary Stratotype Section and Point for the Anthropocene Series.
Anthropocene Review
10.1177/20530196231167019.
(In press).
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Abstract
Sihailongwan Maar Lake, located in Northeast China, is a candidate Global boundary Stratotype Section and Point (GSSP) for demarcation of the Anthropocene. The lake’s varved sediments are formed by alternating allogenic atmospheric inputs and authigenic lake processes and store a record of environmental and human impacts at a continental-global scale. Varve counting and radiometric dating provided a precise annual-resolution sediment chronology for the site. Time series records of radioactive (239,240Pu, 129I and soot 14C), chemical (spheroidal carbonaceous particles, polycyclic aromatic hydrocarbons, soot, heavy metals, δ13C, etc), physical (magnetic susceptibility and grayscale) and biological (environmental DNA) indicators all show rapid changes in the mid-20th century, coincident with clear lithological changes of the sediments. Statistical analyses of these proxies show a tipping point in 1954 CE. 239,240Pu activities follow a typical unimodal globally-distributed profile, and are proposed as the primary marker for the Anthropocene. A rapid increase in 239,240Pu activities at 88 mm depth in core SHLW21-Fr-13 (1953 CE) is synchronous with rapid changes of other anthropogenic proxies and the Great Acceleration, marking the onset of the Anthropocene. The results indicate that Sihailongwan Maar Lake is an ideal site for the Anthropocene GSSP.
| Type: | Article |
|---|---|
| Title: | The Sihailongwan Maar Lake, northeastern China as a candidate Global Boundary Stratotype Section and Point for the Anthropocene Series |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1177/20530196231167019 |
| Publisher version: | https://doi.org/10.1177/20530196231167019 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Life Sciences & Biomedicine, Physical Sciences, Environmental Sciences, Environmental Studies, Geosciences, Multidisciplinary, Environmental Sciences & Ecology, Geology, Anthropocene, artificial radioisotopes, GSSP, Sihailongwan Maar Lake, varve lamination, NUCLEAR ACTIVITIES, VARVED SEDIMENTS, VERTICAL DISTRIBUTIONS, SOURCE IDENTIFICATION, LAMINATED SEDIMENTS, JILIN PROVINCE, VOLCANIC FIELD, ICE-CORE, I-129, RECORD |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL SLASH UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of S&HS UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of S&HS > Dept of Geography |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10168947 |
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