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Bathymetry and deep-water exchange across the central Lomonosov Ridge at 88-89 degrees N
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2007 (English)In: Deep Sea Research Part I: Oceanographic Research Papers, ISSN 0967-0637, E-ISSN 1879-0119, Vol. 54, no 8, 1197-1208 p.Article in journal (Refereed) Published
Abstract [en]

Seafloor mapping of the central Lomonosov Ridge using a multibeam echo-sounder during the Beringia/Healy-Oden Trans-Arctic Expedition (HOTRAX) 2005 shows that a channel across the ridge has a substantially shallower sill depth than the similar to 2500 m indicated in present bathymetric maps. The multibeam survey along the ridge crest shows a maximum sill depth of about 1870 m. A previously hypothesized exchange of deep water from the Amundsen Basin to the Makarov Basin in this area is not confirmed. On the contrary, evidence of a deep-water flow from the Makarov to the Amundsen Basin was observed, indicating the existence of a new pathway for Canadian Basin Deep Water toward the Atlantic Ocean. Sediment data show extensive current activity along the ridge crest and along the rim of a local Intra Basin within the ridge structure.(c) 2007 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
2007. Vol. 54, no 8, 1197-1208 p.
Keyword [en]
arctic ocean; lomonosov ridge; bathymetry; Sediments; deep water; overflow
National Category
Natural Sciences
Research subject
SWEDARCTIC 2005, Beringia 2005
Identifiers
URN: urn:nbn:se:polar:diva-3169DOI: 10.1016/j.dsr.2007.05.010OAI: oai:DiVA.org:polar-3169DiVA: diva2:1049793
Available from: 2016-11-25 Created: 2016-11-21 Last updated: 2016-11-25

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