Sökning: "Lomonosov ridge"

Visar resultat 1 - 5 av 10 avhandlingar innehållade orden Lomonosov ridge.

1. 1. Lipid biomarkers and other geochemical indicators in paleoenvironmental studies of two Arctic systems : a Russian permafrost peatland and marine sediments from the Lomonosov Ridge

   Författare :Rina Argelia Andersson; Magnus Mörth; Richard Pancost; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; lipid biomarkers; peat; permafrost; Arctic Ocean; marine sediments; geokemi; Geochemistry;

   Sammanfattning : The reconstruction of past environmental conditions is a fascinating research area that attracts the interest of many individuals in various geological disciplines. Paleoenvironmental reconstruction studies can shed light on the understanding of past climates and are a key to the prediction of future climate changes and their consequences. LÄS MER

3. 2. The geochemistry of two selected areas of the deep sea, the TAG hydrothermal mound, Mid-Atlantic Ridge and the Lomonosov Ridge, central Arctic Ocean

   Författare :Hakam Al-Hanbali; Gustaf Arrhenius; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biogeochemistry; biogeokemi;

   Sammanfattning : .... LÄS MER

4. 3. Problems of stratigraphic correlation across the Arctic Ocean

   Författare :Emma Sellén; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Sedimentology; Sedimentologi;

   Sammanfattning : Published articles on Arctic Ocean sedimentation rates generally falls into two categories; one suggesting mm/ka-scale sedimentation rates in the Amerasian Basin and the other cm/ka-scale rates in the Eurasian Basin. This is due to the interpretation of the first measured paleomagnetic polarity change in sediment cores as either the Brunhes-Matuyama (781 ka) reversal or as the short time magnetic excursion, Biwa II (220 ka) within the Brunhes Chron. LÄS MER

5. 4. Quaternary paleoceanography of the Arctic Ocean : A study of sediment stratigraphy and physical properties

   Författare :Emma Sellén; Martin Jakobsson; Jan Backman; Dorthe Klitgaard-Kristensen; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Arctic Ocean; sedimentology; Quaternary; stratigraphy; physical properties; Earth sciences; Geovetenskap; Quaternary geology; Kvartärgeologi; Sedimentology; Sedimentologi; Marine Geoscience; marin geovetenskap;

   Sammanfattning : A Quaternary perspective on the paleoceanographic evolution of the central Arctic Ocean has been obtained in this PhD thesis by studying sediment cores from all of the Arctic’s major submarine ridges and plateaus. The included cores were mainly recovered during the Healy-Oden Trans-Arctic expedition in 2005 and the Lomonosov Ridge off Greenland expedition in 2007. LÄS MER

7. 5. Late Quaternary Biostratigraphy and Paleoceanography of the central Arctic Ocean

   Författare :Daniela Hanslik; Martin Jakobsson; Marit-Solveig Seidenkrantz; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Arctic Ocean; Quaternary; biostratigraphy; foraminifera; paleoceanography; Other earth sciences; Övrig geovetenskap; Marine Geoscience; marin geovetenskap;

   Sammanfattning : The central Arctic Ocean is one of the least explored deep sea regions and long biostratigraphic sediment records are sparse. The main focus of this thesis is the Arctic Ocean foraminiferal record and its application to reconstruct paleoceanographic variations and summer sea ice cover changes between late Quaternary interglacial periods. LÄS MER