PhD studentship: Impact of ocean acidification due to industrial era on inorganic geochemistry of deep-sea corals located in the North Atlantic and the high latitudes

Research field
Isotopic geochemistry / Earth and environmental science
Environment and pollution / Earth and environmental science

Title
Impact of ocean acidification due to industrial era on inorganic geochemistry of deep-sea corals located in the North Atlantic and the high latitudes

Abstract
What is the impact of ocean acidification due to industrial era on the development of North Atlantic deep-sea corals? Anthropogenic emissions of CO2 into the atmosphere are acidifying surface waters with values today greater than – 0.13 unit-pH (highest latitudes). Before 2100, such acidification could be tripled. For intermediate or deep waters of the highest latitudes, the fall of pH remains poorly quantified because that heavily depends on oceanic circulation. Thus the LSCE is developing the reconstruction technique of paleo-pH based on boron isotopes in biogenic carbonates. In the framework of the European FP7 Project EPOCA (European Project on OCean Acidification), this technique is today developing on deep corals (Lophelia pertusa; Madrepora occulata). Isotopic measurements of boron will be performed by using new generation mass spectrometer MC-ICPMS at LSCE in collaboration with IPG-Paris. Such measurements will be supplemented by a “multi-proxy” study including major and trace elements (ICP-QMS) as well as oxygen and carbon stable isotopes in order to constrain past changes of temperature. Other tracers more specific of the ocean circulation like radiocarbon or neodymium isotopes may occasionally be tracked. By such reconstruction of natural or anthropogenic changes of pH values, this thesis work has as main objectives to: 1) quantify acidification of intermediate or deep waters due to industrial era at high latitudes; 2) characterize the impact of such acidification on geochemistry of aragonite deep-sea corals;3)compare obtained resuts to model predictions.



Location
Laboratoire des Sciences du Climat et de l’Environnement
GEOchronologie-Traceurs-Archéométrie
Centre : Saclay
Starting date : 01/10/2010

Contact person
Eric DOUVILLE
CEA / DSM/LSCE
Domaine du CNRS
Avenue de la Terrasse
91198 Gif sur Yvette cedex
Phone : +33 169 824 351

University / Graduate School
Paris XI
Dynamique et Physicochimie de la Terre et des Planètes – Paris XI –

Thesis supervisor
Anne JUILLET-LECLERC
CEA / DSM/LSCE//PALEOC
Domaine du CNRS

CEA INSTN, March 2010. Job offer.

0 Responses to “PhD studentship: Impact of ocean acidification due to industrial era on inorganic geochemistry of deep-sea corals located in the North Atlantic and the high latitudes”



  1. Leave a Comment

Leave a Reply




				
  • Search

  • Categories

  • Tags

  • Post Date

Subscribe to the RSS feed

Follow AnneMarin on Twitter

Blog Stats

  • 1,409,772 hits

OA-ICC HIGHLIGHTS

Ocean acidification in the IPCC AR5 WG II

OUP book


%d bloggers like this: