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Report from Joint GEOTRACES-PAGES Workshop available


The Report from the Joint GEOTRACES-PAGES workshop on trace element and isotope proxies in paleoceanography held in Aix-Marseille, France, on 3-5 December 2018 is now published on the Past Global Changes Magazine (May 2019).

Please download and read the report here.

PAGES Magazine

Trace element and isotope proxies in paleoceanography: Starting a new synergic effort around marine geochemical proxies
Past Global Changes Magazine, vol. 27(1), 35, 2019
DOI: https://doi.org/10.22498/pages.27.1.35

 

 

Postdoctoral Position at the University of Southern California, USA

 Postdoctoral position in ocean metals ecology

The John Lab at the University of Southern California seeks a post-doctoral research associate to study the role of metals in ocean ecology. The applicant will develop large-volume trace-metal clean mesocosms. This experimental setup will allow us to explore the role of trace-metals on ocean ecology, moving beyond the ‘instantaneous’ effects measured in typical bottle incubations towards longer-term ecosystem-scale experimentation. Initial experiments will focus on the role of iron from dust in supporting nitrogen fixation in the oceans, with further experiments based on the specific skills and interests of the postdoc, and on opportunities for cross-disciplinary collaboration. Possible areas of further research include the biological cycling of trace-metal isotopes, the role of trace-metals in viral ecology, or the use of mesocosms to constrain global numerical models of metal cycling. The postdoc will have frequent opportunities for collaboration and travel through the Simons Collaboration on Ocean Processes and Ecology (SCOPE) project. Applicants should send a CV and a cover letter describing areas of research interest to Professor Seth John (sethjohn@usc.edu).

Postdoctoral position at the University of Liverpool, UK

Exciting opportunity for a Postdoctoral Researcher to join Professor Tagliabue's research group at the University of Liverpool. This post is linked to the "Bermuda Atlantic Iron Time-series" (BAIT) project, which is a new joint NSF-NERC funded project that links world leading laboratories in the UK and USA. BAIT will bring together observations and modelling to better understand the processes regulating the ocean iron cycle in the upper ocean over the seasonal cycle, using the Bermuda Atlantic Time Series as a natural laboratory. You should have a PhD in ocean biogeochemistry or a related discipline and will be based in the School of Environmental Sciences at the University of Liverpool; the post is available immediately for 24 months.

Closing date: 13 June 2019

For further information: https://bit.ly/2VteY26

 

Survey about GEOTRACES

We need your input to help the GEOTRACES project review the achievements of its first 10 years and plan its next phase. GEOTRACES is the largest international project in the history of chemical oceanography and the results of the project will likely have impacts for decades.

The Scientific Committee on Oceanic Research (SCOR) sponsors the international GEOTRACES project, which is creating a worldwide dataset of the concentrations and distributions of trace elements and isotopes in the ocean.

GEOTRACES is being reviewed by SCOR in the project's mid-life, to help assess the past performance of the project and plan for its future. This survey will contribute to the ongoing review.

Please answer the survey questions to help provide community input to the review. It should only take 10-15 minutes to complete. We need your input by 15 June.

The survey can be found at: https://www.surveymonkey.com/r/Y3T9QB5.

Thank you!

Postdoc in biological fractionation of non-traditional isotopes, LOV, Villefranche-sur-Mer, France

General information

Workplace : Lab of Oceanography of Villefranche-sur-Mer, France (http://www.lov.obs-vlfr.fr/)
Date of publication : 20th May 2019
Type of Contract : FTC Scientist (full time)
Contract Period : between 18 to 24 months according to experience
Expected date of employment : 1st October 2019
Remuneration : between 2500 and 3500 euros gross monthly according to experience
Desired level of education : PhD
Experience required : Indifferent
Deadline for application: 30th June 2019

Missions

The relationships between the concentrations of trace metals and marine biomass and biodiversity remain uncertain. The ISO2MET ANR project targets to apply stable isotope fractionations of trace metals in marine ecotoxicology, and to determine the relationship

Activities

The post-doc will focus his/her activity on characterizing and quantifying biological fractionation of lithium, copper and zinc isotopes in the marine environment. The post-doc will also participate to the experimental work initiated at the cellular level, in collaboration with a laboratory located at the Faculty of Medicine in Nice. At the organism level, the candidate will perform high sensitivity isotopic measurements on plankton, plankton-feeders, fishes, bivalves and corals, collected in contrasted environments, or cultured under controlled conditions. The objective is to establish the control laws of biological isotope fractionations in the ocean and to provide new approaches in ecotoxicology, paleoenvironment and medical fields.

Skills

Candidates should hold a PhD in non-traditional isotopes in the environment and have significant skills in biology and/or paleo-environments. Experience in modeling isotopic and geochemical data would be an asset. The capacity to work in a multidisciplinary team, and the ability to communicate and write easily in English is essential. Additional expertise will be appreciated in ecotoxicology and environmental science.

Work context

LOV is a joint research unit of both the CNRS and Sorbonne University, and is a French marine station specialized in plankton ecology, ocean acidification and marine biogeochemical cycles. At LOV, the post-doc will participate to the newly formed Chemistry-Ocean-Climate (CHOC) team dynamics, that involve 8 researchers, technical staffs and several PhD students. In the context of the project, the post-doc will be part of the ANR ISO2MET team and will benefit from the interdisciplinary and numerous interactions of its members from LOV, LP2M (Nice), IAEA-Monaco, LIENSs (LaRochelle) and ENS-Lyon (https://anr.fr/Project-ANR-18-CE34-0002).

Equipped clean laboratories, ICP-OES, ICP-MS, GC and EA-IRMS are part of the CHOC and the LIENSs platforms. MC-ICP-MS are available in ENS-Lyon. Modeling is performed in collaboration with Nice University biophysicists.

Application

Send applications (CV, name of two referents, motivation letter) or questions to nathalie.vigier@obs-vlfr.fr and to isabelle.maire@obs-vlfr.fr, before 30th June 2019.

Two postdoctoral opportunities, LEMAR, Plouzané, France


1. Postdoctoral Researcher – Ocean Biogeochemistry Modelling 24 months, Plouzané, France

Job description:

The postdoctoral researcher will work on a recently funded ANR project entitled “BIIM” (Biogeochemical Impact of Iron released by Marine particles of sedimentary and hydrothermal origin) which aims to 1) assess the processes leading to the net dissolution of abiotic particulate iron from sedimentary and hydrothermal origin, and 2) evaluate its impact on marine biogeochemistry.

In particular, the postdoctoral researcher will be in charge of setting up the numerical simulation of this newly considered iron compartment. The modelisation will have more specifically to take into account the impact of external parameters (e.g. T°, light, bacteria abundance) on the dissolution of these iron particles. The selected candidate will have to write the equations describing the time evolution of the dissolved iron originating from the iron particles. A 0D model derived from these equations will then have to be coded in Fortran (in order to be easily incorporated in the full 3D biogeochemical model, later in the project) and used to numerically simulate the role of the various in-situ environmental parameters (e.g. T°, light, sediment types) on the dissolved iron concentration. Results of the 0D simulations will be confronted to the comparable experimental data to refine the parameterization. In some cases, this confrontation between the 0D simulations and the experimental data may lead us to modify the experimental design, which has been thought to be flexible. Then, the processes modelled in 0D will be embedded in a 3D ocean biogeochemical model (PISCES) by adding the code corresponding to the influence of the iron particles on the dissolved iron to the PISCES iron module. The end goal of this work is to produce an assessment of the global biogeochemical impact of iron particles on the dissolved iron distribution and variability that, in turn, will impact global biological production patterns. He/She is expected to publish the results in high-impact journals and participate to international conferences. Previous experience with biogeochemical modelling (Unix/Linux environment, Fortran) and knowledge in trace metal biogeochemical cycles are required. Excellent oral and written English and ability to work within a multidisciplinary team are compulsory.

How to apply

To apply, a CV, a letter of application (2 pages max) and the names of three referees should be emailed to helene.planquette@univ-brest.fr

Closing date for applications

All applications for this post should be received in advance of on Monday 17th June 2019. Please note that late applications will not be accepted. Starting date would ideally be in September 2019.

Contact

For further information, contact Dr Thomas Gorgues : thomas.gorgues@ird.fr

 

2- Postdoctoral Researcher – Trace metal ocean biogeochemistry 12 months, renewable 12 months, Plouzané, France

Job description

The postdoctoral researcher will work on a recently funded ANR project entitled “BIIM” (Biogeochemical Impact of Iron released by Marine particles of sedimentary and hydrothermal origin) which aims to 1) assess the processes leading to the net dissolution of abiotic particulate iron from sedimentary and hydrothermal origin, and 2) evaluate its impact on marine biogeochemistry.

In particular, the postdoctoral researcher will be in charge of undertaking careful dissolution experiments of sedimentary and hydrothermal particles. Analyses will include SF-ICP-MS (Element XR/SeaFAST), iron organic speciation by competitive ligand exchange adsorptive cathodic stripping voltammetry (CLE-ACSV) and SEM/XDS imaging. He/She will interpret the results regarding the parameters affecting the dissolution of iron from suspended sedimentary particles. He/she will be interacting with the modellers so that outputs of these experiments can be embedded in biogeochemical models. The end goal of this work is to produce an assessment of the global biogeochemical impact of iron particles on the dissolved iron distribution and variability that, in turn, will impact global biological production patterns.

Previous experience with trace metal clean analytical techniques is required. Excellent oral and written English and ability to work within a multidisciplinary team are compulsory. He/She is expected to publish the results in high-impact journals and participate to international conferences. Strong knowledge in trace metal biogeochemical cycles are required.

How to apply

To apply, a CV, a letter of application (2 pages max) and the names of three referees should be emailed to helene.planquette@univ-brest.fr

Closing date for applications

All applications for this post should be received in advance of on Tuesday 25th June 2019. Please note that late applications will not be accepted. Please note that late applications will not be accepted. Starting date would ideally be in September 2019.

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