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      https://www.ias.ac.in/article/fulltext/jess/127/04/0057

    • Keywords

       

      Palaeo-notch sediment; mid-to-late Holocene; climate change; weathering indices; TOC and TN; Svalbard.

    • Abstract

       

      The Arctic region is very sensitive to climate change and important in the Earth’s climate system. However, proxy datasets for Arctic climate are unevenly distributed and especially scarce for Svalbard because glaciers during the Little Ice Age, the most extensive in the Holocene, destroyed large quantities of sediment records in Svalbard. Fortunately, palaeo-notch sediments could withstand glaciers and bewell-preserved after deposition. In this study, we reconstructed a mid-to-late Holocene record of climate changes in a palaeo-notch sediment sequence from London Island. Multiple weathering indices were determined, they all showed consistent weathering conditions in the study area, and they were closelylinked to climate changes. Total organic carbon (TOC) and total nitrogen (TN) were also determined, and their variation profiles were similar to those of weathering indices. The climate change record in our sediment sequence is consistent with ice rafting record from North Atlantic and glacier activity from Greenland, Iceland and Svalbard, and four cold periods are clearly present. Our study provides arelatively long-term climate change record for climate conditions from mid-to-late Holocene in Svalbard.

    • Author Affiliations

       

      Zhongkang Yang1 2 Liguang Sun1 2 Xin Zhou2 Yuhong Wang2

      1. Anhui Province Key Laboratory of Polar Environment and Global Change, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China.
      2. Institute of Polar Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China.
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  • Journal of Earth System Science | News

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