Volume 40 Issue 5
May  2021
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Zhongyan Shen, Tao Zhang, Jinyao Gao, Chunguo Yang, Qingsheng Guan. Glacial bedforms in the Northwind Abyssal Plain, Chukchi Borderland[J]. Acta Oceanologica Sinica, 2021, 40(5): 114-119. doi: 10.1007/s13131-021-1728-z
Citation: Zhongyan Shen, Tao Zhang, Jinyao Gao, Chunguo Yang, Qingsheng Guan. Glacial bedforms in the Northwind Abyssal Plain, Chukchi Borderland[J]. Acta Oceanologica Sinica, 2021, 40(5): 114-119. doi: 10.1007/s13131-021-1728-z

Glacial bedforms in the Northwind Abyssal Plain, Chukchi Borderland

doi: 10.1007/s13131-021-1728-z
Funds:  The National Natural Science Foundation of China under contract No. 41976079; the Chinese Polar Environment Comprehensive Investigation and Assessment Programmes under contract No. CHINARE-03-03.
More Information
  • Corresponding author: E-mail: yangchunguo@sio.org.cn
  • Received Date: 2020-04-01
  • Accepted Date: 2020-06-03
  • Available Online: 2021-04-26
  • Publish Date: 2021-05-01
  • A series of sub-parallel linear glacial scours are identified on the crest of the Baoshi Seamount in the Northwind Abyssal Plain by compiling new multibeam data acquired during the 9th Chinese Arctic Research Expedition (CHINARE-Arc9) in 2018 and previously published data. The new data reveal scours that developed at water depths of 850–1 030 m with an orientation of about 75°/255°. The maximum water depth occurs in the southernmost scour and is deeper than that from previous investigations, which showed a maximum scouring depth of about 900 m on the seamount. The topographic and geomorphological characteristics suggest that these scours resulted from erosion by the ice shelf extending from the Chukchi margin and/or Laurentide Ice Sheet that grounded on the crest of the seamount and moved in a NE–SW direction. Other possibilities of their genesis include armadas of large icebergs/multi-keel icebergs calved from the Chukchi Shelf or the Laurentide Ice Sheet. The new data provide new constraints for assessing the extent and volume of the ice sheet in the Chukchi area during glacial maxima.
  • †These authors contributed equally
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