Sökning: "bulk sediment"
Visar resultat 6 - 10 av 24 avhandlingar innehållade orden bulk sediment.
6. Quaternary paleoceanography of the Arctic Ocean : A study of sediment stratigraphy and physical properties
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. Paleoceanography of the Eastern Equatorial Pacific over the last eight million years
Sammanfattning : Many studies have investigated the evolution of the Eastern Equatorial Pacific (EEP) Ocean paleoceanography since the late Neogene because of its role in regulating the Earth’s climate and because global climate has undergone major changes during this time period. However, current understanding of the EEP paleoceanography encounters two basic problems. LÄS MER
8. Holocene vegetation dynamics and climate changes in the Torneträsk area, northern Sweden
Sammanfattning : The aim of this study was to reconstruct the Holocene vegetation history and the climate changes in a subarctic area. The results are based on pollen and macrofossil records from six lakes in the Torneträsk area. The lakes are situated at altitudes between 370 and 999 m a.s. LÄS MER
9. Deposit-feeding in benthic macrofauna : Tracer studies from the Baltic Sea
Sammanfattning : A low content of organic matter, which is largely refractory in nature, is characteristic of most sediments, meaning that aquatic deposit-feeders live on a very poor food source. The food is derived mainly from sedimenting phytodetritus, and in temperate waters like the Baltic Sea, from seasonal phytoplankton blooms. LÄS MER
10. The role of sediments in the biogeochemical cycles of nutrients in the Gulf of Riga
Sammanfattning : The sediment biogeochemistry of C, N, P and biologic silica (BSi) plays an important role in cycling of these elements in aquatic ecosystems. In shallow coastal and estuarine systems, water-sediment nutrient dynamics can influence biological processes (e.g., primary production) in overlying waters. LÄS MER