20/07/2021

Post-doc position: Archaeological charred woods and reconstruction of past climates

This job offer has expired


  • ORGANISATION/COMPANY
    Université Pierre et Marie Curie/Paris 6
  • RESEARCH FIELD
    Environmental scienceGlobal change
    GeosciencesOther
    HistoryMedieval history
  • RESEARCHER PROFILE
    First Stage Researcher (R1)
  • APPLICATION DEADLINE
    25/08/2021 23:00 - Europe/Athens
  • LOCATION
    France › Paris
  • TYPE OF CONTRACT
    Temporary
  • JOB STATUS
    Full-time
  • HOURS PER WEEK
    40
  • OFFER STARTING DATE
    01/11/2021

OFFER DESCRIPTION

SCIENTIFIC CONTEXT

This post-doc project aims to investigate how post-depositional processes modify the geochemical signatures of ancient charcoals and consequently, δ13C-based climate reconstruction. The work is part of a larger project focused on Medieval Climatic Optimum, socio-economic development and its forestry consequences. This project relies on an interdisciplinary collaboration between dendro-anthracologists, palynologists, biogeochemists, soil scientists, and historians. This project is funded by the Domaine d’intérêt majeur Matériaux anciens et patrimoniaux in the framework of the DIM-MAP call for post-doctoral funding.

PROJECT AIMS AND JOB PROFILE

Produced by the use of wood as fuel or during forest fires, charcoals are ubiquitous in soils and sediments. Persisting in soil and sediments over millennia, ancient charcoals offer then a unique window to reconstruct palaeoclimate changes provided carbonisation and post-depositional processes do not bias the use of their stable carbon isotope composition (δ13C) as a climate proxy. The objectives of this project are (i) to assess the effects of fire and of post-depositional processes on the geochemistry of woods and (ii) to apply these insights to reconstruct past climate modifications determining the δ13C isotopic composition in archaeological charred woods. To this end, the project is composed of three parts. The first part will aim to understand how the heterogeneity of carbonization impacts the initial chemical properties of wood, in particular its δ13C isotopic composition. Different taxa often found in archaeological contexts will then be charred experimentally at different temperatures. Combination of Rock-Eval thermal analysis, Raman spectroscopy, infrared spectroscopy and gas chromatography coupled with an isotope ratio mass spectrometer (GC-irMS) will be used to determine the geochemical and δ13C isotopic compositions of studied woods. The second part of the project will aim to investigate how post-depositional processes modifies our perception of (i) the carbonization undergone by charred wood and of (ii) climate proxies. This will be achieved through the incubation of charcoals into soil. The geochemical properties of charcoals will be investigated following the procedure defined in the first part of the project. Finally, the third part of this project will consist in reconsidering δ13C-based climate reconstruction according to the application of previous key insights on archaeological charred woods.

More Information

Eligibility criteria

GENERAL INFORMATION

Contract duration: 12 months

Location: Paris

The post-doctoral candidate will be hosted in METIS and will work with AASPE and MONARIS Research Units. Several missions in Nancy (LEMTA) are scheduled.

Worktime percentage: Full time

Qualification required: PhD (Postdoc experience < 2 years)

Starting date : November 2021

Deadline for application (CV (including the list of publications) + application letter + thesis reports): August 25th, 2021

Interviews: Early september

Required Research Experiences

  • RESEARCH FIELD
    GeosciencesOther
  • YEARS OF RESEARCH EXPERIENCE
    1 - 4
  • RESEARCH FIELD
    HistoryMedieval history
  • YEARS OF RESEARCH EXPERIENCE
    1 - 4

Offer Requirements

  • REQUIRED EDUCATION LEVEL
    Environmental science: PhD or equivalent
    Geosciences: PhD or equivalent
    History: PhD or equivalent

Skills/Qualifications

The candidate should be trained in Earth Sciences, with a strong taste for biogeochemistry and lab work. Knowledge and/or interest for archaeology, dendrology, geology or soil science would be highly appreciated.

 

Specific Requirements

Interdisciplinarity: work between different laboratories.

Project in relation with the progress of the restoration work of the cathedral.

Work in clean labs with strong acids.

Work location(s)
1 position(s) available at
METIS
France
Paris
75252
4 place Jussieu

EURAXESS offer ID: 666250

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