PhD student on Fe-Mn colimitation of Antarctic phytoplankton, University of Bremen, Germany

The working group Ecotrace embedded in the Marine Botany Department at the University Bremen offers the position of a PhD Researcher in Antarctic phytoplankton ecophysiology for the duration of 3 years starting from September/October 2018. Salary will be according to the German Federal pay scale (TV-L 13).

Job Description:
The Southern Ocean (SO) exerts a disproportional control on the global carbon cycle, thus affecting climate at a global scale. Southern Ocean phytoplankton are major drivers of global carbon cycling accounting for 20% of the global annual primary production. In the SO, the biological uptake of carbon dioxide is mainly controlled by the availability of the trace metal iron (Fe) and light, both being essential for photosynthesis. Whereas most studies so far focused on disentangling how Fe and light influence SO phytoplankton growth and productivity, almost nothing is known whether other trace metals such as manganese (Mn) also act as limiting or co-limiting nutrient in the SO. Mn is required for various cellular processes in phytoplankton cells and has been suggested to be (co-)limiting with Fe in some parts of the SO such as the Drake Passage. Currently, we lack information on growth, photosynthesis, oxidative stress and Mn and Fe requirements under Fe-Mn limitation for SO phytoplankton species. This research project aims to improve our understanding about the potential effects of Fe-Mn co-limitation on SO phytoplankton physiology and their implications for the ecology and biogeochemistry in the present and future SO. To this end, the responses of SO phytoplankton will be studied in response to altered Fe and Mn availabilities under different light conditions, simulating different climate change scenarios. A multidisciplinary approach will be followed that integrates biology and marine chemistry and combines laboratory and field work. Laboratory experiments with ecologically and biogeochemically important phytoplankton species of the SO will provide a mechanistic understanding on physiological processes such as photosynthesis and trace metal requirements. Shipboard manipulation experiments with natural SO phytoplankton assemblages of different regions of the SO will further reveal the occurrence of Fe-Mn co-limitation and will help to identify phytoplankton species in the field, which are particularly sensitive, but also tolerant towards altered trace metal and light availabilities. All together this research project will help to assess an ecophysiological explanation for the spatial distribution of SO key phytoplankton species in the present and the future SO. Improved knowledge on the functioning and the sensitivity of the SO ecosystem is pivotal to improve our existing predictive tools (e.g. modelling) and increase our understanding on the mechanisms, by which the SO affects climatic processes at global scale.

The successful candidate should hold a Master’s degree (or comparable) in biology, marine biology, marine chemistry or environmental sciences. Ideally the candidate is experienced in:
- applying methods in plant physiology

- trace metal clean working techniques
- culturing marine phytoplankton
- trace metal chemistry

The candidate should be highly motivated and able to work in a small, closely cooperating team. The international nature of the project requires fluency in spoken and written English and good presentation and publication skills. In addition, the successful candidate should have good team spirit. The successful candidate will be embedded in the working group Ecotrace, headed by Prof. Dr. Scarlett Trimborn.

Conditions of employment:
The position is limited to 3 years and will start in October 2018, if possible. As the University of Bremen intends to increase the proportion of female employees in science, women are particularly encouraged to apply. In case of equal personal aptitudes and qualification, disabled persons will be given priority. Applicants with a migration background are welcome.

How to Apply & What to Do in Case of Questions:
Applications should comprise a motivation letter, complete CV including any achievements, degree certificates (including list of courses and grades), names and contact details of at least two referees, and a list of your publications.

Please send your application until August 31 as a single pdf-file not exceeding 10 MByte via e-mail to: Prof. Dr. Scarlett Trimborn, scarlett.trimborn at


Post-doctoral Associate, Rutgers, The State University of New Jersey, USA

Post-doctoral Associate a the Department of Marine and Coastal Sciences, Rutgers, The State University of New Jersey

Job Summary: The Department of Marine and Coastal Sciences at Rutgers University invites applications for a Postdoctoral Research Associate. Areas of interest include: metal isotope geochemistry, sediment geochemistry, trace metal geochemistry, paleoreconstruction of ocean anoxia. The candidate will be based in Dr. Silke Severmann’s lab on the New Brunswick campus. Additional duties include helping undergraduate students conduct independent research projects, presenting and publishing research results. For more information please contact Silke Severmann (

Job Description: The focus of the work is an ongoing project to measure U and Cr stable isotopes in modern marine environments. These two transition metals and their isotopes find application in the reconstruction of past ocean anoxia and changes in the biological pump. The primary aim is to contribute to the calibration of these two isotope proxies and improve interpretation of their geological records. Specifically, the project seeks to provide a detailed understanding of the dominant isotope effects associated with different sedimentary sinks and their uptake mechanism. Field sampling for this project has recently been completed. The candidate will be responsible for implementing a method to analyze U and Cr isotopes in marine sediments, porewaters and seawater.

Minimum Requirements: Applicant must have a PhD in chemical oceanography, biogeochemistry, analytical chemistry or a related field. If not a US citizen or greencard holder, applicants must be eligible for a J1 visa.

Preferred Requirements: The successful candidate will have demonstrated expertise in (1) metal isotope analysis, (2) trace metal analytical techniques, and (3) have a strong publication record. Prior research experience in areas related to sediment geochemistry is helpful, but not essential. The candidate should have excellent oral and written English language communications skills.

For fullest consideration, applications should be received by July 30, 2018. Evaluation of applications and interviews of candidates will begin immediately until a suitable candidate is chosen. Applicants should include a cover letter, a curriculum vitae including a publication list, a research statement, and contact information for three references familiar with their work. Applications can be submitted here: or sent directly to The initial award is for one year, with the possibility of renewal for a second year depending upon satisfactory performance and available funding. The starting date is flexible, but summer/fall of 2018 is preferable.

Rutgers, The State University of New Jersey, is an Equal Opportunity/Affirmative Action Employer.  Qualified applicants will be considered for employment without regard to race, creed, color, religion, sex, sexual orientation, gender identity or expression, national origin, disability status, genetic information, protected veteran status, military status or any other category protected by law.  As an institution, we value diversity of background and opinion, and prohibit discrimination or harassment on the basis of any legally protected class in the areas of hiring, recruitment, promotion, transfer, demotion, training, compensation, pay, fringe benefits, layoff, termination or any other terms and conditions of employment.

Tenure-Track Faculty Position in Chemical Oceanography, University of South Florida, USA

The College of Marine Science at the University of South Florida invites applications for a tenure-track, nine-month academic appointment in Chemical Oceanography at the Assistant, Associate, or Professor level.  Rank is dependent on qualifications and experience.

We seek a Chemical Oceanographer who will contribute to an understanding of the ocean/climate system, from basic disciplinary topics to ecosystems analyses.  Qualified candidates will employ modern tools of multi-disciplinary science to understand regional and global issues critical to the ocean system. Candidates will be selected on the basis of their potential to conduct transformative research within their discipline, their productivity with respect to peer reviewed publications, acquisition of external research funding, and a potential for outstanding mentoring and teaching.  The successful candidate would be expected to contribute to core courses in oceanography and teach specialty courses at the graduate level.

Minimum Requirements: Must have a PhD in a relevant scientific discipline at the time of hire with research experience in the field of Chemical Oceanography.

Preferred qualifications: Applicants should be capable of interacting with colleagues in multi-disciplinary oceanographic research. 

For the Assistant Professor rank, candidates should have a record of scholarly products and demonstrate potential for a career of creative work and scholarly publications, demonstrate potential for acquisition of extramural research funding, exhibit a commitment to exemplary instruction and mentoring of graduate students, and demonstrate a culture of high ethics and service to their professional community and to the public.

For the Associate Professor / Professor rank, candidates should have an outstanding record in research including a substantive publication and other scholarly product record, evidence of success in attracting extramural research funding, a commitment to exemplary instruction and mentoring of graduate students, and demonstrate a culture of high ethics and service to their professional community and to the public.

Contact: For information regarding the available position, please contact Dr. Kristen Buck, kristenbuck@usf.eduor Tim Trowbridge,

Application procedures: Apply online at Careers@USFPlease submit a cover letter stating qualifications.  Please append research and teaching statements, curriculum vitae, and contact information for three referees. Position is open until filled, however, priority review of applications will begin by August 1, 2018.  Appointment is anticipated to commence August 1, 2019.

Faculty Position Announcement, Bar-Ilan University, Israel

The Department of Geography and Environment at Bar-Ilan University invites applications for a tenure track position in the field of Earth Sciences.

We are seeking outstanding applicants who hold a PhD in Earth Sciences or Physical Geography. The candidate should have a proven record of research and academic publications in the relevant field and preferably at least one year of postdoctoral experience. Preference will be given to candidates specializing in geomorphology, hydrology or soil science, and experience with geographical information systems is advantageous. The candidate will be expected to teach introductory and advanced courses, supervise graduate students, and conduct an active program of extramural research. The language of instruction is Hebrew. The appointment will commence in October 2019.

Applications will be considered according to the university's appointment procedures and suitability of the candidate to the unique nature of the University. Rank will be commensurate with the applicant's qualifications.

The deadline for submitting applications is August 1, 2018.

The application materials should include the following:

  • A letter of intent to teach in the department of Geography and Environment from October 2019
  • CV including a ranked list of publications (impact factor, journal ranking in the relevant field, and number of citations)
  • Copies of four publications
  • A short academic biography and an outline of future research plans
  • A brief description of courses the candidate could teach
  • Names and contact information of three professional referees.

Application materials should be sent electronically to:

Prof. Itamar Lensky, Chair
Department of Geography and Environment

Information about the Department of Geography and Environment can be found at:


MS/PhD Position available in Chemical Oceanography at USF, Florida, USA

MS/PhD Position available in Chemical Oceanography at USF College of Marine Science to begin Fall or Spring 2019

Project Area: Iron isotope biogeochemistry (MarMITE group)

Advisor: Dr. Tim Conway

The MarMITE group at the University of South Florida focuses on using trace metal isotope tracers in order to better understand the integral role of trace metals in modern carbon cycling and biogeochemical cycles. We also focus on how we can use these tracers to better understand the ocean system in the geological past and future climate. Iron is perhaps the most important of these metals and is an essential micronutrient in biogeochemical systems. In recent years iron isotopes have been used in order to constrain cycling and sources of iron to natural waters, including the ocean. We are looking for a highly motivated graduate student (PhD or MS) to join our group at USF, focusing one one of the projects below:

1) Investigating how Fe is released from atmospheric dust in the oceans. This NSF-funded project in collaboration with Oregon State will involve experimental lab work and field studies investigating the mechanisms by which different organic molecules enhance dissolution of metals from dust in seawater. This project involves funded fieldwork at Bermuda and in the Gulf of Mexico.

2) Sources, cycling and sinks of Fe throughout the oceans. This project will make use of samples from GEOTRACES section cruises from different areas of the Pacific and Atlantic to further our understanding of how Fe enters the oceans from sediments, hydrothermal vents and atmospheric dust in these regions. Future cruise participation is possible.

The student will measure trace metal concentrations and isotopes in USF's new Tampa Bay Plasma Facility, which includes an ISO-6 Clean lab dedicated for seawater processing, a SeaFast system, Thermo HR ICPMS Element XR and Thermo MC-ICPMS Neptune. Candidates must have a strong undergraduate background in chemical, earth or physical science. Laboratory experience in geochemistry is desirable, but not required. 

A minimum of 2 years of salary+tuition is available, with opportunities for extension through a wide range of college endowed fellowships or further grant funding, and research costs for the projects are fully funded. There will be opportunities for local and international cruises, and to present at national and international conferences.

The USF College of Marine Science is located on the water in sunny St Petersburg, Florida, and hosts a vibrant community of graduate students and faculty undertaking world class research in a range of oceanographic disciplines. For more information about the college please visit We strongly encourage diverse applications and equal opportunities.

Contact Tim Conway ( for more information and details on how to apply. The deadline for Fall admissions is Jan 15th, but earlier applications are encouraged! For spring admission please contact asap.

Intermediate Data Product 2017 Paper - In press

The Intermediate Data Product 2017 (IDP2017) paper is now in press and accessible online:  

Schlitzer, R., Anderson, R. F., Masferrer Dodas, E, et al., The GEOTRACES Intermediate Data Product 2017, (2018). Chemical Geology

This article is open-access, so please advertise and distribute as widely as possible!

 Data Product (IDP2017)


 Data Assembly Centre (GDAC)


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