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Francois Lacan Researcher at CNRS LEGOS, Laboratoire
d'Etude en Géophysique et Océanographie Spatiales ![]()
Chargé
de Recherche, CNRS
14 av. Edouard Belin, 31400 Toulouse, France
Phone : +33 5 61 33 30 43 - Fax. +33 5
61 25 32 05
Background
and mobility
• Researcher (CR1 CNRS) LEGOS,
France, Oct. 2009 – present.
• Researcher (CR2 CNRS) LEGOS, France, Oct. 2005 –
Sept 09.
• Post-Doctoral Fellow LSCE,
• Post-Doctoral Fellow
• Teaching assistant (part time)
Scientific
Interests
Geochemistry applied
to matter fluxes and water mass transports in the modern ocean.
• Iron isotopes: origins of iron inputs to
the ocean, role of the margins in the iron oceanic cycle.
• Neodymium isotopes: water mass circulation
and mixing, terrigeneous inputs, dissolved-particulate exchanges.
• Thorium and
Protactinium isotopes: deep water ventilation, scavenging, particulate fluxes.
• Cadmium isotopes: primary production,
carbon fluxes, deep water ventilation.
Multi-tracer approach. Hydrology.
Modelling of geochemical tracers. Paleoceanography proxy calibration.
Skills
• Trace element chemistry (notably in seawater).
Preconcentration, purification (liquid chromatography), mineralization (notably
microwave);
• Mass spectrometry :Thermo Ionization
(Thermo Finnigan MAT 261), Inductively Coupled Plasma: single collection
(Perkin-Elmer ELAN 6000, Thermo Finnigan Element II) and multi collection
(Thermo Finnigan Neptune), isotopic dilutions, double spiking, interference
corrections, sensitivity corrections, mass bias corrections;
• Atomic Absorption;
• Seawater sampling (in situ pumps...);
• Core sampling. Pore water sampling.
Experience at
Sea
• INDOMIX :
R/V Marion Dufresne, IPEV, July. 2010,
•
BONUS-GOODHOPE : R/V Marion Dufresne, IPEV, Feb. Mar. 2008,
• EUCFe -
ISOFERIX : R/V Kilo Moana, Univ of
• TIP2000 :
(R/V Marion Dufresne, IFRTP,
• Indomix (INSU, PI. A. Koch-Larrouy,
LEGOS). 2010-2012. Physical and geochemical transformations within the Indonesian
throughflow.
• SOLWARA (INSU, PI. S. Cravatte, LEGOS).
2008-2010. Physical and geochemical transformations within the
• GEOCAL (INSU, PI. F. Lacan, LEGOS).
2008-2010. A French contribution to the GEOTRACES
intercalibration effort (Fe, Nd and Ra isotopes, 231Pa, 230Th)
• BONUS-GOODHOPE
(LEFE, ANR, PIs M. Boyé LEMAR, S. Speich LPO). 2007-2012. Interactions between
the dynamic, circulation, biogeochemistry and geochemistry in the
• ISOFERIX
(INSU, PI. F. Lacan, LEGOS). 2006-2008. ISOtopic tracing of Fe
sources in the Equatorial Pacific: impact on new primary production and
nitRogen fIXation (EUCFE
cruise)
• AMANDES (ANR,
PI. C. Jeandel, LEGOS). 2006-2008. Weathering and transport
of elements at a crucial land-sea interface (Amazone estuary)
• KEOPS
(INSU, PI. S. Blain. LOB). 2005-2007. KErguelen :compared study of the Ocean
and the Plateau in Surface water
• MOZAIQUE
(INSU, PI. J-C Dutay, LSCE). 2006-2009. Modeling of trace
elements in the ocean: Neodymium (Nd), Protactinium (Pa) and Thorium (Th)
• OceanicCdIC (WHOI, PI. R. Francois). 2003. Cadmium
isotopic composition in the ocean
• SIGNATURE/GINS (INSU, PI C. Jeandel, LEGOS).
1999-2002. Neodymium isotopic composition in the