Chinese Journal of Polar Research

Chinese Journal of Polar Research ›› 2020, Vol. 32 ›› Issue (1): 121-131.DOI: 10.13679/j.jdyj.20190004

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Advances of using highly branched isoprenoids (HBIs) as a polar sea ice proxy

Wu Jiaqi1,2, Zhao Jun1,2, Han Zhengbing1,2, Li Dong1,2, Zhang Haifeng1,2, Fan Gaojing1,2, Guo Xiaoze1,2, Jin Haiyan1,2, Pan Jianming1,2, Zhang Haisheng1,2   

  1. 1.Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China;
    2.Key Laboratory of Marine Ecosystem Dynamics, Ministry of Natural Resources, Hangzhou 310012, China
  • Received:2019-01-21 Revised:2019-04-13 Online:2020-03-30 Published:2020-03-30
  • Contact: Jian-Ming -PAN

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Abstract:

Understanding long-term sea ice variations is crucial for reconstruction of past climate and prediction of future climate. Recently, highly branched isoprenoids (HBIs), which is an organic geochemical lipid biomarker, has been proposed as a possible indicator of polar sea ice conditions. Mono-HBI (IP25) and dine-HBI (IPSO25), which are produced by diatoms living in association with seasonal sea ice, have been considered as potential measures of Arctic and Antarctic sea ice, respectively. In this paper, we summarize the research on polar sea ice reconstruction using HBIs. These include verification of proxies, factors influencing effectiveness of proxies, and development and application of indices to categorize sea ice conditions and reconstruct sea ice concentration quantitatively. We also highlight research gaps and propose future research directions in this field.

Key words: highly branched isoprenoid, sea ice reconstruction, IP25, IPSO25