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jobTitle |
Post Doctoral Research Associate |
| 2b59c59b8b188fbe2c6521f3fc64e944 |
research overview |
<p>My main research interests are in understanding geological processes that control
environmental conditions at the surface of the Earth by developing and using chemical
and isotopic proxies, particularly non-traditional stable isotope systems. My current
projects focus on comprehending modern and past environments and on investigating
the distribution of isotopes in nature and the biogeochemical mechanisms that fractionate
these isotopes. This specifically includes:</p><ul><li><em>Determining past levels
of global seawater oxygenation.</em>I am currently working on establishing a multi-proxy
(Mo, Re and U stable isotopes) record of global ocean oxygenation spanning the large
climatic gradient of the Early Cenozoic (56-25 Ma). The combination of proxies with
different residence times in the ocean and different sensitivities to oxygen concentration
in seawater will allow us to refine our knowledge of past global seawater oxygenation
variations and to get a better understanding of the dominant factors driving episodes
of oceanic anoxia.</li></ul><p> </p><ul><li><em>Investigating the potential of
Li isotopes as tracers for weathering processes</em>. Li isotopes show major fractionation
during the weathering of continental silicate minerals as the lighter isotope is preferentially
retained in clay minerals. Variations in Li isotope signatures in the surface environment
can thus provide us with crucial information on present and past clay production and
thus weathering rates, which are intrinsically related to climate. I have investigated
Li fractionation processes both at the scale of water-rock interactions in the Strengbach
watershed (<a href="http://ohge.unistra.fr/" rel="nofollow">OHGE</a>, Vosges Mountains,
France), and at the continental scale by studying Li signatures of groundwater discharge
to the Bay of Bengal. I am also interested in developing the potential of Li isotopes
as a proxy for quantifying past weathering processes.</li></ul><p> </p><ul><li><em>Tracing
chemical fluxes in permafrost regions.</em>Boreal regions probably will be among the
areas most sensitive to climate change. The destabilisation of the permafrost, in
particular, will lead to major environmental disruptions. Thus, it is critical to
understand the functioning of permafrost ecosystems so we can identify their response
to global warming. I have studied the watershed of the Nizhnaya Tunguska (main tributary
of the Yenisei river) in Central Siberia where I investigated the sources and pathways
of dissolved chemical fluxes, the biogeochemical cycling of elements, and soil dynamics
using a wide range of isotopic tools such as Sr and Ca isotopes and U-series disequilibria.</li></ul> |
| 2b59c59b8b188fbe2c6521f3fc64e944 |
hasMembership |
faculty-of-science |
| 2b59c59b8b188fbe2c6521f3fc64e944 |
biography |
<p><span>I am a Post Doctoral Research Associate specialising in low-temperature isotope
geochemistry. I have been working in the</span>Environment, Earth& Ecosystems
department since October 2013, within<span>the</span><span><u><a href="http://palaeoenvironmentalchange.org/"
rel="nofollow"><span>Palaeoenvironmental Change Research Group</span></a></u></span><span>.</span></p><p><span>My
research is focused on</span><span>understanding present and past geochemical surface
processes and their interplay with climate. At the OU, I am currently working on the
NERC-funded research project“Response of Global Ocean Oxygenation to Early Cenozoic
Climate Extremes</span><span>”</span><span>.</span></p><p><em>Qualification </em></p><p>Ph.D.
in Environmental Geochemistry (Oct. 2010), University of Strasbourg, France <i>Title:
Geochemical and multi-isotopic study of Siberian watersheds. Sources of dissolved
chemical fluxes and characterization of soil-water-plant chemical transfers in a permafrost
environment</i>(Advisors: F. Chabaux, O.S. Pokrovsky)</p><p><em>Previous Appointments</em></p><ul><li>Mar.
2013– Aug. 2013 Postdoctoral Research Fellow, University of Strasbourg, France</li><li>Apr.
2011 - Dec. 2012 Post Doctoral Research Associate, University of Southern California,
Los Angeles, USA</li><li>Oct. 2009 - Dec. 2010 Research and Teaching Fellow, University
of Strasbourg, France</li><li>Oct. 2006 - Oct. 2009 Teaching Assistant, University
of Strasbourg, France</li></ul><p> </p> |
| 2b59c59b8b188fbe2c6521f3fc64e944 |
holder_of |
ResearchStaff |
| 2b59c59b8b188fbe2c6521f3fc64e944 |
type |
Person |
| 2b59c59b8b188fbe2c6521f3fc64e944 |
label |
Dr Marie-Laure Bagard |
| 2b59c59b8b188fbe2c6521f3fc64e944 |
account |
mb28757 |
| 2b59c59b8b188fbe2c6521f3fc64e944 |
familyName |
Bagard |
| 2b59c59b8b188fbe2c6521f3fc64e944 |
Given name |
M. |
| 2b59c59b8b188fbe2c6521f3fc64e944 |
Given name |
Marie-Laure |
| 2b59c59b8b188fbe2c6521f3fc64e944 |
Given name |
M. L. |
| 2b59c59b8b188fbe2c6521f3fc64e944 |
Given name |
M.-L. |
| 2b59c59b8b188fbe2c6521f3fc64e944 |
sha1sum of a personal mailbox URI name |
570e801d1b16a5921376a07fe339e0eaa72440d0 |
| 2b59c59b8b188fbe2c6521f3fc64e944 |
name |
Marie-Laure Bagard |
| 2b59c59b8b188fbe2c6521f3fc64e944 |
name |
M. Bagard |
| 2b59c59b8b188fbe2c6521f3fc64e944 |
name |
M. L. Bagard |
| 2b59c59b8b188fbe2c6521f3fc64e944 |
name |
M.-L. Bagard |
| 2b59c59b8b188fbe2c6521f3fc64e944 |
title |
Dr |
| 2b59c59b8b188fbe2c6521f3fc64e944 |
work info homepage |
mb28757 |
| 2b59c59b8b188fbe2c6521f3fc64e944 |
Description |
<p><span>I am a Post Doctoral Research Associate specialising in low-temperature isotope
geochemistry. I have been working in the</span>Environment, Earth& Ecosystems
department since October 2013, within<span>the</span><span><u><a href="http://palaeoenvironmentalchange.org/"
rel="nofollow"><span>Palaeoenvironmental Change Research Group</span></a></u></span><span>.</span></p><p><span>My
research is focused on</span><span>understanding present and past geochemical surface
processes and their interplay with climate. At the OU, I am currently working on the
NERC-funded research project“Response of Global Ocean Oxygenation to Early Cenozoic
Climate Extremes</span><span>”</span><span>.</span></p><p><em>Qualification </em></p><p>Ph.D.
in Environmental Geochemistry (Oct. 2010), University of Strasbourg, France <i>Title:
Geochemical and multi-isotopic study of Siberian watersheds. Sources of dissolved
chemical fluxes and characterization of soil-water-plant chemical transfers in a permafrost
environment</i>(Advisors: F. Chabaux, O.S. Pokrovsky)</p><p><em>Previous Appointments</em></p><ul><li>Mar.
2013– Aug. 2013 Postdoctoral Research Fellow, University of Strasbourg, France</li><li>Apr.
2011 - Dec. 2012 Post Doctoral Research Associate, University of Southern California,
Los Angeles, USA</li><li>Oct. 2009 - Dec. 2010 Research and Teaching Fellow, University
of Strasbourg, France</li><li>Oct. 2006 - Oct. 2009 Teaching Assistant, University
of Strasbourg, France</li></ul><p> </p> |
| 2b59c59b8b188fbe2c6521f3fc64e944 |
in dataset |
oro |
| 2b59c59b8b188fbe2c6521f3fc64e944 |
in dataset |
profiles |