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Datasets of project "Canary Islands Azores Gibraltar Observations"

Mostrando recursos 1 - 20 de 330

  1. Physical oceanography during METEOR cruise M37/2

    Müller, Thomas J; Wefer, Gerold

  2. Physical oceanography during cruise CORNIDE_DE_SAAVEDRA_198

    Gonzalez, Nicolas; MEDAR Group

  3. Geochemistry, fluxes and nitrogen isotopic composition data of traps LP1 and EBC2-1 and cores GeoB4242-4 and Geo4301-1

    Freudenthal, Tim; Neuer, Susanne; Meggers, Helge; Davenport, Robert; Wefer, Gerold
    We compare total and biogenic particle fluxes and stable nitrogen isotope ratios (d15N) at three mooring sites along a productivity gradient in the Canary Islands region with surface sediment accumulation rates and sedimentary d15N. Higher particle fluxes and sediment accumulation rates, and lower d15N were observed in the upwelling influenced eastern boundary region (EBC) compared to the oligotrophic sites north of Gran Canaria [European Station for Time-Series in the Ocean, Canary Islands (ESTOC]] and north of La Palma (LP). The impact of organic matter degradation and lateral particle advection on sediment accumulation was quantified with respect to the multi-year flux...

  4. Physical oceanography during cruise CORNIDE_DE_SAAVEDRA_299 (CANIGO)

    Gonzalez, Nicolas; MEDAR Group

  5. Planktic foraminifera analyses of surface sediments and satellite data in the Canary Islands region

    Meggers, Helge; Freudenthal, Tim; Nave, Silvia Osorio; Targarona, Jordi; Abrantes, Fatima F; Helmke, Peer
    The Canary Islands region occupies a key position with respect to biogeochemical cycles, with the zonal transition from oligotrophic to nutrient-rich waters and the contribution of Saharan dust to the particle flux. We present the distribution of geochemical proxies (TOC, carbonate, d15N, d13Corg, C/N-ratio) and micropaleontological parameters (diatoms, dinoflagellates, foraminifera, pteropods), in 80 surface-sediment samples in order to characterise the influence of coastally upwelled water on the domain of the subtropical gyre. Results of the surface-sediment analyses confirmed the high biomass gradient from the coast to the open ocean inferred from satellite data of surface chlorophyll or SST. The distribution of...

  6. Investigation of time series stations along a productivity gradient north of the Canary Islands

    Neuer, Susanne; Freudenthal, Tim; Davenport, Robert; Llinás, Octavio; Rueda, Mariá-José
    Three stations along a productivity gradient north of the Canary Islands were investigated for surface-water properties, particle flux, and composition (biogenic and lithogenic components, and stable nitrogen isotope composition, delta15N) and export production. Investigation sites along the east-west transect off the NW African upwelling margin included the European Station for Time-Series in the Ocean, Canary Islands (ESTOC), one location contiguous to the NW African upwelling zone in the Eastern Boundary Current (EBC) and one station north of the island La Palma (LP). The seasonality of surface-water properties along the transect was mainly influenced by the winter cooling and simultaneous phytoplankton...

  7. Geochemistry of sediments from the upwelling off Morocco

    Freudenthal, Tim; Meggers, Helge; Henderiks, Jorijntje; Kuhlmann, Holger; Moreno, Ana; Wefer, Gerold
    The high-productive upwelling area off Morocco is part of one of the four major trade-wind driven continental margin upwelling zones in the world oceans. While coastal upwelling occurs mostly on the shelf, biogenic particles derived from upwelling are deposited mostly at the upper continental slope. Nutrient-rich coastal water is transported within the Cape Ghir filament region at 30°N up to several hundreds of kilometers offshore. Both upwelling intensity and filament activity are dependent on the strength of the summer Trades. This study is aimed to reconstruct changes in trade wind intensity over the last 250,000 years by the analysis of...

  8. Flux data from trap LP1_trap

    Neuer, Susanne; Freudenthal, Tim; Davenport, Robert; Llinás, Octavio; Rueda, Mariá-José

  9. Flux data from trap EBC2-1_trap

    Neuer, Susanne; Freudenthal, Tim; Davenport, Robert; Llinás, Octavio; Rueda, Mariá-José

  10. Physical oceanography at station POS233/d-CTD-672_094

    Knoll, Michaela; Müller, Thomas J

  11. Physical oceanography at station POS233/c-CTD-671_093

    Knoll, Michaela; Müller, Thomas J

  12. Physical oceanography at station POS233/c-CTD-670_092

    Knoll, Michaela; Müller, Thomas J

  13. Physical oceanography at station POS233/c-CTD-665_091

    Knoll, Michaela; Müller, Thomas J

  14. Physical oceanography at station POS233/c-CTD-664_090

    Knoll, Michaela; Müller, Thomas J

  15. Physical oceanography at station POS233/c-CTD-663_089

    Knoll, Michaela; Müller, Thomas J

  16. Physical oceanography at station POS233/c-CTD-658_088

    Knoll, Michaela; Müller, Thomas J

  17. Physical oceanography at station POS233/c-CTD-657_087

    Knoll, Michaela; Müller, Thomas J

  18. Physical oceanography at station POS233/c-CTD-656_086

    Knoll, Michaela; Müller, Thomas J

  19. Physical oceanography at station POS233/c-CTD-655_085

    Knoll, Michaela; Müller, Thomas J

  20. Physical oceanography at station POS233/c-CTD-654_084

    Knoll, Michaela; Müller, Thomas J

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