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Datasets of project "Biological Oceanography @ AWI"

Mostrando recursos 1 - 20 de 1.226

  1. Biogeochemical characterization of pennate diatom and Melosira arctica ice algal aggregates in the Central Arctic Ocean collected in summer 2011 and 2012

    Fernández-Méndez, Mar; Wenzhöfer, Frank; Peeken, Ilka; Sørensen, Heidi L; Glud, Ronnie N; Hendricks, Stefan; Nicolaus, Marcel; Katlein, Christian; Nöthig, Eva-Maria; Bakker, Karel; Boetius, Antje
    Sea-ice diatoms are known to accumulate in large aggregates in and under the sea ice including melt ponds. In the Arctic, they can contribute substantially to particle export when sinking from the ice. The role and regulation of microbial aggregation in the highly seasonal, nutrient- and light-limited Arctic sea-ice ecosystem is not yet well understood, and may vary in relation to the fate of the Arctic sea-ice cover. To elucidate the mechanism controlling the formation and export of algal aggregates from sea ice, we investigated samples taken in late summer 2011 and 2012, during two cruises to the Eurasian Basin...

  2. Biogeochemical characterization of pennate diatom and Melosira arctica ice algal aggregates in the Central Arctic Ocean collected in summer 2011 and 2012

    Fernández-Méndez, Mar; Wenzhöfer, Frank; Peeken, Ilka; Sørensen, Heidi L; Glud, Ronnie N; Hendricks, Stefan; Nicolaus, Marcel; Katlein, Christian; Nöthig, Eva-Maria; Bakker, Karel; Boetius, Antje
    Sea-ice diatoms are known to accumulate in large aggregates in and under the sea ice including melt ponds. In the Arctic, they can contribute substantially to particle export when sinking from the ice. The role and regulation of microbial aggregation in the highly seasonal, nutrient- and light-limited Arctic sea-ice ecosystem is not yet well understood, and may vary in relation to the fate of the Arctic sea-ice cover. To elucidate the mechanism controlling the formation and export of algal aggregates from sea ice, we investigated samples taken in late summer 2011 and 2012, during two cruises to the Eurasian Basin...

  3. First results from the Arctic Mid-Ocean Ridge Expedition with POLARSTERN and HEALY

    Thiede, Jörn; Barrais, Jörg; Drachev, Sergej; Gauger, Steffen; Haas, Christian; Hartmann, Thomas; Hatzky, Jörn; König-Langlo, Gert; Lieser, Jan L; Niessen, Frank; Schenke, Hans Werner; Shevchenko, Vladimir P; Snow, Jonathan E; Spielhagen, Robert F

  4. First results from the Arctic Mid-Ocean Ridge Expedition with POLARSTERN and HEALY

    Thiede, Jörn; Barrais, Jörg; Drachev, Sergej; Gauger, Steffen; Haas, Christian; Hartmann, Thomas; Hatzky, Jörn; König-Langlo, Gert; Lieser, Jan L; Niessen, Frank; Schenke, Hans Werner; Shevchenko, Vladimir P; Snow, Jonathan E; Spielhagen, Robert F

  5. Physical oceanography during POLARSTERN cruise ANT-XXVII/3 (PS77, CAMBIO)

    Graeve, Martin; Bohlmann, Harald; Fillinger, Laura; Gerdes, Dieter; Knust, Rainer

  6. Physical oceanography during POLARSTERN cruise ANT-XXVII/3 (PS77, CAMBIO)

    Graeve, Martin; Bohlmann, Harald; Fillinger, Laura; Gerdes, Dieter; Knust, Rainer

  7. Physical oceanography during POLARSTERN cruise ANT-XXVII/3 (PS77, CAMBIO)

    Graeve, Martin; Bohlmann, Harald; Fillinger, Laura; Gerdes, Dieter; Knust, Rainer

  8. Physical oceanography during POLARSTERN cruise ANT-X/6

    Smetacek, Victor; de Baar, Hein J W; Bathmann, Ulrich; Lochte, Karin; Rutgers van der Loeff, Michiel M

  9. Physical oceanography during POLARSTERN cruise ANT-X/6

    Smetacek, Victor; de Baar, Hein J W; Bathmann, Ulrich; Lochte, Karin; Rutgers van der Loeff, Michiel M

  10. Physical, chemical and biological oceanography during Polarstern cruise ANT-X/6

    Smetacek, Victor; de Baar, Hein J W; Bathmann, Ulrich; Lochte, Karin; Rutgers van der Loeff, Michiel M
    The R.V. Polarstern cruise ANT X/6, part of the international Southern Ocean JGOFS programme, investigated phytoplankton spring bloom development and its biogeochemical effects in different water masses of the Atlantic sector of the Southern Ocean: the Polar Frontal region (PFr), the southern Antarctic Circumpolar Current zone (sACC), its boundary with the Weddell Gyre (AWB) and the marginal ice zone (MIZ). The relative roles of physical stability, iron limitation and grazing pressure in enhancing or constraining phytoplankton biomass accumulation were examined. Three sections were carried out between the PFr and the ice edge along the 6°W meridian from early October to...

  11. Physical, chemical and biological oceanography during Polarstern cruise ANT-X/6

    Smetacek, Victor; de Baar, Hein J W; Bathmann, Ulrich; Lochte, Karin; Rutgers van der Loeff, Michiel M
    The R.V. Polarstern cruise ANT X/6, part of the international Southern Ocean JGOFS programme, investigated phytoplankton spring bloom development and its biogeochemical effects in different water masses of the Atlantic sector of the Southern Ocean: the Polar Frontal region (PFr), the southern Antarctic Circumpolar Current zone (sACC), its boundary with the Weddell Gyre (AWB) and the marginal ice zone (MIZ). The relative roles of physical stability, iron limitation and grazing pressure in enhancing or constraining phytoplankton biomass accumulation were examined. Three sections were carried out between the PFr and the ice edge along the 6°W meridian from early October to...

  12. Physiology, growth and development of larval krill ''Euphausia superba'' in autumn and winter in the Lazarev Sea, Antarctica

    Meyer, Bettina; Fuentes, Veronica; Guerra, Citlali; Schmidt, Katrin; Atkinson, Angus; Spahic, Susanne; Cisewski, Boris; Freier, Ulrich; Olariaga, Alejandro; Bathmann, Ulrich
    The physiological condition of larval Antarctic krill was investigated during austral autumn 2004 and winter 2006 in the Lazarev Sea, to provide better understanding of a critical period of their life cycle. The condition of larvae was quantified in both seasons by determining their body length (BL), dry mass (DM), elemental- and biochemical composition, as well as stomach content analysis, and rates of metabolism and growth. Overall the larvae in autumn were in better condition under the ice than in open water, and for those under the ice there was a decrease in condition from autumn to winter. Thus growth...

  13. Physiology, growth and development of larval krill ''Euphausia superba'' in autumn and winter in the Lazarev Sea, Antarctica

    Meyer, Bettina; Fuentes, Veronica; Guerra, Citlali; Schmidt, Katrin; Atkinson, Angus; Spahic, Susanne; Cisewski, Boris; Freier, Ulrich; Olariaga, Alejandro; Bathmann, Ulrich
    The physiological condition of larval Antarctic krill was investigated during austral autumn 2004 and winter 2006 in the Lazarev Sea, to provide better understanding of a critical period of their life cycle. The condition of larvae was quantified in both seasons by determining their body length (BL), dry mass (DM), elemental- and biochemical composition, as well as stomach content analysis, and rates of metabolism and growth. Overall the larvae in autumn were in better condition under the ice than in open water, and for those under the ice there was a decrease in condition from autumn to winter. Thus growth...

  14. Physiology, growth and development of larval krill ''Euphausia superba'' in autumn and winter in the Lazarev Sea, Antarctica

    Meyer, Bettina; Fuentes, Veronica; Guerra, Citlali; Schmidt, Katrin; Atkinson, Angus; Spahic, Susanne; Cisewski, Boris; Freier, Ulrich; Olariaga, Alejandro; Bathmann, Ulrich
    The physiological condition of larval Antarctic krill was investigated during austral autumn 2004 and winter 2006 in the Lazarev Sea, to provide better understanding of a critical period of their life cycle. The condition of larvae was quantified in both seasons by determining their body length (BL), dry mass (DM), elemental- and biochemical composition, as well as stomach content analysis, and rates of metabolism and growth. Overall the larvae in autumn were in better condition under the ice than in open water, and for those under the ice there was a decrease in condition from autumn to winter. Thus growth...

  15. Growth rates of Euphausia superba at station PS69/515-A

    Meyer, Bettina; Fuentes, Veronica; Guerra, Citlali; Schmidt, Katrin; Atkinson, Angus; Spahic, Susanne; Cisewski, Boris; Freier, Ulrich; Olariaga, Alejandro; Bathmann, Ulrich

  16. Growth rates of Euphausia superba at station PS69/515-A

    Meyer, Bettina; Fuentes, Veronica; Guerra, Citlali; Schmidt, Katrin; Atkinson, Angus; Spahic, Susanne; Cisewski, Boris; Freier, Ulrich; Olariaga, Alejandro; Bathmann, Ulrich

  17. Growth rates of Euphausia superba at station PS69/515-A

    Meyer, Bettina; Fuentes, Veronica; Guerra, Citlali; Schmidt, Katrin; Atkinson, Angus; Spahic, Susanne; Cisewski, Boris; Freier, Ulrich; Olariaga, Alejandro; Bathmann, Ulrich

  18. Growth rates of Euphausia superba at station PS69/498-C

    Meyer, Bettina; Fuentes, Veronica; Guerra, Citlali; Schmidt, Katrin; Atkinson, Angus; Spahic, Susanne; Cisewski, Boris; Freier, Ulrich; Olariaga, Alejandro; Bathmann, Ulrich

  19. Growth rates of Euphausia superba at station PS69/498-C

    Meyer, Bettina; Fuentes, Veronica; Guerra, Citlali; Schmidt, Katrin; Atkinson, Angus; Spahic, Susanne; Cisewski, Boris; Freier, Ulrich; Olariaga, Alejandro; Bathmann, Ulrich

  20. Growth rates of Euphausia superba at station PS69/498-C

    Meyer, Bettina; Fuentes, Veronica; Guerra, Citlali; Schmidt, Katrin; Atkinson, Angus; Spahic, Susanne; Cisewski, Boris; Freier, Ulrich; Olariaga, Alejandro; Bathmann, Ulrich

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