論文

査読有り
2017年9月

Earth system feedback statistically extracted from the Indian Ocean deep-sea sediments recording Eocene hyperthermals

SCIENTIFIC REPORTS
  • Kazutaka Yasukawa
  • ,
  • Kentaro Nakamura
  • ,
  • Koichiro Fujinaga
  • ,
  • Minoru Ikehara
  • ,
  • Yasuhiro Kato

7
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1038/s41598-017-11470-z
出版者・発行元
NATURE PUBLISHING GROUP

Multiple transient global warming events occurred during the early Palaeogene. Although these events, called hyperthermals, have been reported from around the globe, geologic records for the Indian Ocean are limited. In addition, the recovery processes from relatively modest hyperthermals are less constrained than those from the severest and well-studied hothouse called the Palaeocene-Eocene Thermal Maximum. In this study, we constructed a new and high-resolution geochemical dataset of deep-sea sediments clearly recording multiple Eocene hyperthermals in the Indian Ocean. We then statistically analysed the high-dimensional data matrix and extracted independent components corresponding to the biogeochemical responses to the hyperthermals. The productivity feedback commonly controls and efficiently sequesters the excess carbon in the recovery phases of the hyperthermals via an enhanced biological pump, regardless of the magnitude of the events. Meanwhile, this negative feedback is independent of nannoplankton assemblage changes generally recognised in relatively large environmental perturbations.

Web of Science ® 被引用回数 : 2

リンク情報
DOI
https://doi.org/10.1038/s41598-017-11470-z
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000410297900018&DestApp=WOS_CPL

エクスポート
BibTeX RIS