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Bathymetry and deep-water exchange across the central Lomonosov Ridge at 88°-89°N
Stockholm University, Faculty of Science, Department of Geology and Geochemistry. Marin geovetenskap.
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2007 (English)In: Deep-Sea Research I, Vol. 54, 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 2500m 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.

Place, publisher, year, edition, pages
2007. Vol. 54, 1197-1208 p.
Keyword [en]
Arctic Ocean, bathymetry, oceanography
Identifiers
URN: urn:nbn:se:su:diva-19545DOI: doi:10.1016/j.dsr.2007.05.010ISI: 000249238400001OAI: oai:DiVA.org:su-19545DiVA: diva2:186069
Available from: 2007-11-12 Created: 2007-11-12 Last updated: 2011-01-11Bibliographically approved

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