期刊
QUATERNARY SCIENCE REVIEWS
卷 279, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.quascirev.2021.107239
关键词
Arctic ocean; Magnetostratigraphy; U-seriers isotopes; Paleoclimatology
The authors propose a climatostratigraphy of the Arctic Ocean based on previous research, which explores different sedimentation rates and leads to distinct climatostratigraphic inferences.
Xiao et al. (2021) propose a climatostratigraphy of the Arctic Ocean built from a Mn-based cyclostratigraphy of deep sediments tuned to stack marine isotope stratigraphy that was proposed by Jakobsson and others in 2000. This cyclostratigraphy led to infer relatively high sedimentation rates in the central Arctic Ocean during the last glacial/interglacial cycles. It however required a reinterpretation of the magnetostratigraphy by inferring long-duration reversals during the Brunhes epoch. It also bypassed chronological constraints from U-series isotopes data. More recent papers based notably on the decay of U-series isotopes in sedimentary sequences, invalidate the chronology of the Mn-based cyclostratigraphy but confirm earlier works. This revised chronostratigraphy, in accordance with that of pre-2000 papers, points to much lower sedimentation rate estimates. It leads to drastically distinct climatostratigraphic inferences, as illustrated in the present comment from a tentative re-interpretation of the Xiao et al.'s data. (C) 2021 Elsevier Ltd. All rights reserved.
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