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1 x 1,0 Postdoc Researcher

Post-Doctoral Researcher

The MARUM - Centre for Marine Environmental Sciences at the University of Bremen, is
offering (under the condition of job release) as soon as possible and until December, 31st, 2021

                              One post-doctoral Researcher

                          Salary group 13 TV-L / full-time position

The employment is fixed-term and governed by the Act of Academic Fixed-Term Contract, §2
I (Wissenschaftszeitvertragsgesetz – WissZeitVG). Therefore, candidates may only be
considered for appointment if they still have the respective qualification periods available
in accordance with § 2 (1) WissZeitVG.

MARUM and University of Bremen provides an ideal environment for postdoctoral researchers
to become excellent in their field of expertise and to develop their personal skills to
further their career. The Research Faculty offers plenty of opportunities for transdisciplinary
exchange and collaboration across different disciplines in marine sciences. Postdoctoral researchers
can make use of coaching and mentoring offers as well as a dedicated course and training programme.

As part of a larger project (REEBUS, Work-package 6: “Carbon fluxes in the water column”) between
GEOMAR and the MARUM and University of Bremen we offer a post-doctoral position at the MARUM and
University of Bremen to study the mechanisms driving export and attenuation of organic matter in
low oxygen eddies. The experimental work will be done during a sea-going expedition north of Cape
Verde, which is the corridor for low oxygen eddies originating from the cost of northwest Africa.
Currently we know little about particle transport, carbon export and turnover processes of settling
organic aggregates within eddies with strong oxygen depletion. In the oxygenated water column, we
typically observe strong flux attenuation in the upper few hundred meters due to efficient microbial
degradation and high zooplankton grazing on settling aggregates. However, strong oxygen depletion might
reduce and alter microbial degradation and zooplankton grazing, which potentially decrease the attenuation
in the upper water column, finally allowing higher export of organic matter within these eddies.

We will combine in situ observations with on-board laboratory studies:

  1. Biogeochemical fluxes using drifting sediment traps,
  2. Gel-traps to make detailed studies of individual settling aggregates,
  3. In situ camera systems to determine vertical distribution of aggregate types, abundance, and size-distribution,
  4. Marine snow catchers to collect undisturbed in situ formed aggregates for laboratory measurements of composition,
    size-specific settling velocities, and size-specific microbial degradation,
  5. Direct observations of zooplankton aggregate feeding using infra-red video recordings of in situ collected
    zooplankton and marine snow,
  6. In situ zooplankton sampling to determine vertical community distribution.

This work will be done in parallel to detailed oceanographic studies of eddy-dynamics, autonomous systems for
in situ observations (gliders, wave-gliders, and drifters), air-sea exchange of CO2, primary production,
microbial dynamics, and long-term export from deep ocean sediment traps at site CVOO north of the Cape Verdes.

Specific duties will include:

  • Participation in expeditions (scheduled Nov-Dec 2019).
  • Willingness to spend time for shorter field campaigns at the research station in Mindelo, Cape Verde.
  • Particle sampling using drifting sediment traps, in situ particle cameras, zooplankton nets and marine
    snow catchers.
  • On-board laboratory work to measure aggregate composition, size, settling, microbial respiration, and video
    recordings of zooplankton feeding on in situ collected marine aggregates.
  • Determination of in situ zooplankton abundance and composition.
  • Image analyses of particle type, abundance and size-distribution in relation to water column structure
    (temperature, salinity, fluorescence, oxygen, etc.).
  • Statistical analyses of large data sets.
  • Participation in meetings, analyses of data, and preparation of publications.

Your profile:

  • A PhD in biogeochemistry and/or marine biology with knowledge of phyto/zooplankton ecology and/or
    carbon/nutrient cycles.
  • Knowledge/interest in the functioning of the biological carbon pump/carbon cycle.
  • Skills in oceanography, marine biology, plankton ecology, and/or microbiology.

MARUM has developed into an internationally recognized centre for marine research with a focus on the
geosciences, anchored at the University of Bremen.

The University of Bremen follows a diversity strategy. It strives to increase the number of women in the
academy and strongly encourages applications from suitably qualified female candidates. International
applications and applications of academics with a migration background are explicitly welcome. Disabled
persons with the same professional and personal qualifications will be given preference.

We look forward to receiving your application either in German or in English with the usual document
(letter of motivation, a curriculum vitae, copies of scientific degrees, reference letters) until the
December, 27, 2018 send your application under the reference number A326/18 to:

Gerhard Fischer and Morten Iversen:
www.gfischer@marum.de & www.miversen@marum.de


Erstellt am 06.12.18 von Rebekka Rosner