Please use this identifier to cite or link to this item:
Authors: Ha, Sangbeom* 
Colizza, Ester* 
Torricella, Fiorenza* 
Langone, Leonardo* 
Giglio, Federico* 
Kuhn, Gerhard* 
Macrì, Patrizia* 
Khim, Boo-Keun* 
Title: Glaciomarine sediment deposition on the continental slope and rise of the central Ross Sea since the Last Glacial Maximum
Journal: Marine Geology 
Series/Report no.: /445 (2022)
Publisher: Elsevier
Issue Date: 2022
DOI: 10.1016/j.margeo.2022.106752
Abstract: The continental margin of the Ross Sea has been consistently sensitive to the advance and retreat of the Ross Ice Sheet (RIS) between the interglacial and glacial periods. This study examines changes of the glaciomarine sedimentation on the continental slope and rise to the eastern side of Hillary Canyon in the central Ross Sea, using three gravity cores collected at increasing water depths. Besides older AMS 14C ages of bulk sediments, based on the analytical results, sediment lithology was divided into units A, B1, and B2, representing Holocene, deglacial, and glacial periods, respectively. The sedimentation rate decreased as the water depth increased, with a higher sedimentation rate in the deglacial period (unit B1) than the Holocene (unit A). Biological productivity proxies were significantly higher in glacial unit B2 than in interglacial unit A, with transitional values observed in deglacial unit B1. Biological productivity generally decreased in the Antarctic continental margin during the glacial period because of extensive sea ice coverage. The higher biogenic contents in unit B2 are primarily attributed to the increased transport of eroded and reworked shelf sediments that contained abundant biogenic components to the continental slope and rise beneath the advancing RIS. Thus, glacial sedimentation on the continental slope and rise of the central Ross Sea was generally governed by the activity of the RIS, which generated melt-water plumes and debris flows at the front of the grounding line, although the continental rise might have experienced seasonally open conditions and lateral effects due to the bottom current.
Appears in Collections:Article published / in press

Files in This Item:
File Description SizeFormat
JQSR_Kim et al. 2021_draft_c.pdf3.76 MBAdobe PDFView/Open
Show full item record

Page view(s)

checked on Mar 29, 2023


checked on Mar 29, 2023

Google ScholarTM