DOI: 10.1002/2014GL060267
论文题名: Deep water paleo-iceberg scouring on top of Hovgaard Ridge-Arctic Ocean
作者: Arndt J.E. ; Niessen F. ; Jokat W. ; Dorschel B.
刊名: Geophysical Research Letters
ISSN: 0094-9947
EISSN: 1944-9678
出版年: 2014
卷: 41, 期: 14 起始页码: 5068
结束页码: 5074
语种: 英语
英文关键词: Arctic
; bathymetry
; Fram Strait
; glacial history
; iceberg scours
; seafloor morphology
Scopus关键词: Bathymetry
; Earth sciences
; Geophysics
; Arctic
; Continental margin
; Fram strait
; Glacial history
; Glacial maxima
; Multibeam echo sounder
; Seafloor morphologies
; Subbottom profilers
; Sea ice
; deep sea
; echo sounder
; ice sheet
; ice thickness
; iceberg
; paleoclimate
; scour
; Arctic Ocean
; Anna
英文摘要: In multibeam echosounder and subbottom profiler data acquired during R/V Polarstern cruise ARK-VII/3a from the Hovgaard Ridge (Fram Strait), we found evidence for very deep (>1200 m) iceberg scouring. Five elongated seafloor features have been detected that are interpreted to be iceberg scours. The scours are oriented in north-south/south-north direction and are about 15 m deep, 300 m wide, and 4 km long crossing the entire width of the ridge. They are attributed to multiple giant paleo-icebergs that most probably left the Arctic Ocean southward through Fram Strait. The huge keel depths are indicative of ice sheets extending into the Arctic Ocean being at least 1200 m thick at the calving front during glacial maxima. The deep St. Anna Trough or grounded ice observed at the East Siberian Continental Margin are likely source regions of these icebergs that delivered freshwater to the Nordic Seas. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84904273104&doi=10.1002%2f2014GL060267&partnerID=40&md5=4109751d944c105608aea4e584619024
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7211
Appears in Collections: 气候减缓与适应
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作者单位: Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany
Recommended Citation:
Arndt J.E.,Niessen F.,Jokat W.,et al. Deep water paleo-iceberg scouring on top of Hovgaard Ridge-Arctic Ocean[J]. Geophysical Research Letters,2014-01-01,41(14).