Rekonstruktion der Variabilität von radiogenen Isotopensignaturen des Labradorwassers und dessen Stärke im Holozän.
Physik, Chemie und Biologie des Meeres
Zusammenfassung der Projektergebnisse
The new data allowed us to shed light on the reliability of the Nd isotope system as a water mass tracer, providing crucial information for the ongoing discussion. The produced dataset is the first comprehensive analysis of the end member water mass sources that directly contribute to the Labrador Sea Water and as follows the North Atlantic Deep Water. New data for the first time showed no major change in the end-member water mass signatures over the course of the Holocene. This suggest that unradiogenic excursion recorded off the coast of Nova Scotia either driven by strengthening of the Labrador Current influence or (and) changes in the sediment source inputs and weathering regime. Analysis of the changes in the water mass circulation over the Holocene period, caused by melt water perturbations will shed light on the long-term effects of the climate change on the ocean water mass transport and causal relationship between the ocean and the atmosphere. Major findings achieved in this project were: New rare earth element data from Hudson strait sediments supports the important role of the detrital carbonate dissolution on the signatures recorded by authigenic phases and benthic and planktonic foraminifera. - New Nd, Hf and Pb isotope data show no major changes in the end-member water mass signatures. - Unradiogenic excursion in the Nd isotope data off the Nova Scotian shelf during the middle and late Holocene indicate strengthening of the Labrador Current.
Projektbezogene Publikationen (Auswahl)
-
Biogenic carbonate fluxes and preservation in the northwestern Labrador Sea since the Last Glacial Maximum. Palaeogeography, Palaeoclimatology, Palaeoecology, 576, 110498.
Marshall, Nicole R.; de Vernal, Anne; Mucci, Alfonso; Filippova, Alexandra; Kienast, Markus; Gibb, Olivia & Hillaire-Marcel, Claude
-
Reconstructing the Holocene Variability of the Strength and Radiogenic Isotope Composition of Labrador Sea Water. Goldschmidt Conference, virtual, Flash Talk
Alexandra Filippova, Anna J. Pieńkowski, Ed Hathorne & Martin Frank
-
Glacial weathering and erosion inputs into the Labrador Sea during the last 18 kyrs. International Conference on Paleoceanography, Poster, Virtual
Alexandra Filippova, Anna J. Pieńkowski, Ed Hathorne & Martin Frank
-
Reconstructing the history of meltwater inputs into the Canadian Arctic Archipelago and Hudson Strait. Past Global Changes Conference, Talk, Virtual
Alexandra Filippova, Anna J. Pieńkowski, Ed Hathorne & Martin Frank
-
The Labrador Sea: What the past can tell us about future? Marine Carbon Sinks workshop, poster.
Alexandra Filippova
-
The Labrador Sea: What the past can tell us about future? Science day at Geomar Helmholtz Centre for Ocean Research Kiel, poster, in person.
Alexandra Filippova
-
Authigenic and Detrital Carbonate Nd Isotope Records Reflect Pulses of Detrital Material Input to the Labrador Sea During the Heinrich Stadials. Paleoceanography and Paleoclimatology, 38(2).
Filippova, Alexandra; Frank, Martin; Kienast, Markus; Gutjahr, Marcus; Hathorne, Ed C. & Hillaire‐Marcel, Claude
-
Water mass circulation in the Labrador Sea based on radiogenic isotopes. GEOMAR Espresso talk series (Invited talk)
Alexandra Filippova
