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Late Quaternary cyclic variations of ice sheet and paleoproductivity in the Amundsen Sea sector, Antarctica
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Mengshan Ju1, 2, Zhihua Chen1, 2, *, Renjie Zhao1, Xiangqin Wang1, Yuanhui Huang1, Shulan Ge1, 2, Zheng Tang1
Haiyang Xuebao | 2019, 41(9) : 40 - 51
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Haiyang Xuebao | 2019, 41(9): 40-51
• Special Column of Polar Research •
Late Quaternary cyclic variations of ice sheet and paleoproductivity in the Amundsen Sea sector, Antarctica
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Mengshan Ju1, 2, Zhihua Chen1, 2, *, Renjie Zhao1, Xiangqin Wang1, Yuanhui Huang1, Shulan Ge1, 2, Zheng Tang1
Affiliations
  • 1 First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
  • 2 Laboratory for Marine Geology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266061, China
Published: 2019-09-25 doi: 10.3969/j.issn.0253-4193.2019.09.004
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Core AMS01 dredged on the northwestern continental rise of the Amundsen Sea was used to reconstruct the history of ice sheet and paleoproductivity since MIS9 (about 34 ka BP) based on the analyses of color reflectance, grain size and geochemical proxies. The results show that: (1) Grain size and paleoproductivity proxies of the core exhibits evident glacial–interglacial cycles of Quaternary; (2) The interglacials such as MIS9, MIS7 and MIS5 have low sedimentation rates, brown sediments, low ice-rafted detritus (IRD) contents and high paleoproductivity, indicating warm climate, limited sea ice and large-scale retreat of the ice sheet in the Amundsen Sea sector; (3) Glacial ages such as MIS8c, MIS8a, MIS6 and MIS2 have relatively high sedimentation rates, gray sediments, high IRD and low biological components, which indicate the ice sheet expanded greatly to the edge of the continental shelf, and the continental rise became a proximal environment close to the grounded ice sheet and/or floating ice shelf with dense sea ice and icebergs, and significantly lowered marine productivity; (4) In the glacials and interglacials, ice sheet and paleoproductivity also have certain fluctuations, especially in MIS8b interstadial, the light brown sediments with low IRD and elevated marine productivity make it be like the environment of interglacial period, which indicates that the ice sheet and ocean in the Amundsen Sea sector are more sensitive to climate change than those in the East Antarctica.

West Antarctica  /  the Amundsen Sea  /  Late Quaternary  /  ice sheet  /  paleoproductivity
Mengshan Ju, Zhihua Chen, Renjie Zhao, Xiangqin Wang, Yuanhui Huang, Shulan Ge, Zheng Tang. Late Quaternary cyclic variations of ice sheet and paleoproductivity in the Amundsen Sea sector, Antarctica[J]. Haiyang Xuebao, 2019 , 41 (9) : 40 -51 . DOI: 10.3969/j.issn.0253-4193.2019.09.004
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Article Info
doi: 10.3969/j.issn.0253-4193.2019.09.004
  • Receive Date：2019-01-07
  • Online Date：2026-04-03
  • Published：2019-09-25
Article Data
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  • Received：2019-01-07
  • Revised：2019-02-28
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Affiliations
    1 First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
    2 Laboratory for Marine Geology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266061, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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