Postdoctoral position in ocean biogeochemistry modellingExternal

News Overview

Contact: Dr Thomas Gorgues
E-mail: thomas.gorgues [at] ird.fr
Deadline: June 17, 2019

GEOTRACES are seeking a postdoctoral researcher who 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 [dot] planquetteatuniv-brest [dot] fr