20/04/2021
The Human Resources Strategy for Researchers
European Research Council

Researcher in cyclostratigraphy

This job offer has expired


  • ORGANISATION/COMPANY
    CNRS
  • RESEARCH FIELD
    Astronomy
    Environmental science
    Geosciences
  • RESEARCHER PROFILE
    First Stage Researcher (R1)
  • APPLICATION DEADLINE
    11/05/2021 23:59 - Europe/Brussels
  • LOCATION
    France › PARIS 14
  • TYPE OF CONTRACT
    Temporary
  • JOB STATUS
    Full-time
  • HOURS PER WEEK
    35
  • OFFER STARTING DATE
    01/09/2021
  • EU RESEARCH FRAMEWORK PROGRAMME
    H2020 / ERC

OFFER DESCRIPTION

The successful applicant will be working in the interdisciplinary AstroGeo team (Astronomy and Geology) at IMCCE (Paris Observatory) on the analysis of existing sedimentary data from Cenozoïc to Mesozoic Era. This will in many cases be performed in interaction with the researchers that are the most acquainted with these data. The objective of the postdoc is to establish a database of the most significant stratigraphic sequences, to analyse or re-analyse them with robust statistical methods that will have to be developed, and to provide some constraints on the astronomical solution. This work will be performed in close collaboration with the astronomers and mathematicians of the AstroGeo project. The postdoc may have to travel to several countries in Europe and to other part of the world.

A 3-year postdoctoral position (1 year, plus 2 additional years after successful evaluation of the first year) supported by the ERC AstroGeo (Astronomical Solutions over Geological Time) is offered at Institut de Mécanique Céleste et de Calcul des Ephémérides (IMCCE, Paris Observatory, France) to work with Pr. Jacques Laskar and his team on the analysis of long sequences of stratigraphic records from Cenozoic to Mesozoic Era. These analyses will be used to constrain the next generation of long term astronomical solutions for paleoclimate computations. The successful applicant will have the opportunity to contribute to a large collaborative project and to develop original methods for the statistical analysis of stratigraphic data.

According to Milankovitch's theory (Milankovitch, 1941), part of the large climatic changes of the past is due to the variations of the insolation on the surface of the Earth resulting from the deformation of its orbit resulting from the gravitational disturbances of the other planets. These variations can be extracted from the stratigraphic records accumulated over several million years (Ma). The correlation between the geological data and the calculations of celestial mechanics is now sufficiently established so that the geological time scales of the most recent periods are constructed using the astronomical solutions (Laskar et al, 2004). Moreover, in the past two decades a major effort has been devoted to extend this astronomical calibration over the entire Cenozoic, up to 66 Ma (e.g. Gradstein et al, 2020).

However, extending this work is difficult because celestial mechanics does not allow us to retrace the planetary orbits beyond 60 Ma due to the chaotic nature of the movement of the planets (Laskar, 1989). The AstroGeo project aims to overcome this predictability horizon, imposed by the laws of gravitation. This will be achieved by considering statistical methods and by using ancient geological data as an additional constraint in obtaining astronomical solutions. The feasibility of such approach was demonstrated by the recent analysis of the Newark sedimentary data record showing the possibility to recover the state of the solar system 200 Ma ago beyond the horizon of predictability imposed by the laws of Celestial Mechanics (Olsen et al., 2019). AstroGeo will more generally aim to bring astronomical solutions to a next level of accuracy and time validity.

More Information

Eligibility criteria

The applicant will have a solid formation in geology and stratigraphy.
Additional skills needed:
- Knowledge in cyclostratigraphy and Milankovitch cycles.
- Familiar with techniques of time series analysis and statistical data analysis.
- Proficiency in software tools and some software programming language as well as database management.
-Ability to collaborative research.
- Autonomy
- initiative.
- Excellent English level.

Additional comments

We are looking for a highly motivated researcher with experience starting from right after the PhD or more. The proposed salary will be adjusted to take into account the experience. The expected date of employment is September 1, 2021 with some flexibility.
The candidate should submit a cover letter, CV and list of publications on the CNRS job portal (https://emploi.cnrs.fr/). Letters of recommendation will be appreciated. Applications should be submitted preferably before May 31, 2021. Subsequent applications may be considered as long as the position remains unfilled. More information request and recommendation letters can be send to jacques.Laskar@obspm.fr. Benefits included: health insurance, maternity/paternity leave, lunch participation, family supplement for children, public transportation participation, retirement contribution.

Web site for additional job details

Required Research Experiences

  • RESEARCH FIELD
    Geosciences
  • YEARS OF RESEARCH EXPERIENCE
    None
  • RESEARCH FIELD
    Astronomy
  • YEARS OF RESEARCH EXPERIENCE
    None
  • RESEARCH FIELD
    Environmental science
  • YEARS OF RESEARCH EXPERIENCE
    None

Offer Requirements

  • REQUIRED EDUCATION LEVEL
    Geosciences: PhD or equivalent
    Astronomy: PhD or equivalent
    Environmental science: PhD or equivalent
  • REQUIRED LANGUAGES
    FRENCH: Basic
Work location(s)
1 position(s) available at
Institut de mécanique céleste et de calcul des éphémérides
France
PARIS 14

EURAXESS offer ID: 631311
Posting organisation offer ID: 21083

Disclaimer:

The responsibility for the jobs published on this website, including the job description, lies entirely with the publishing institutions. The application is handled uniquely by the employer, who is also fully responsible for the recruitment and selection processes.

 

Please contact support@euraxess.org if you wish to download all jobs in XML.