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Frank Dehairs’s multi-proxy team
The Southern Ocean Water Mass Circulation and Biogeochemistry
• Stéphanie Jacquet (ANCH)
• Marc Elskens (ANCH)
• Anne Julie Cavagna (ANCH)
• Damien Cardinal (MRAC , Tervuren)
The Southern Ocean
• 18 % of the World Ocean, circumpolar distribution• Active hydrological and ecological dynamics
Key role in the global C cycle and climatic changes
CO2 , HCO3-
NO3-, NH4
+, urea
Si(OH)415N, 13,14C, 30,32Si, algae biomarkers
234Th
Baxs
Surface layer
Mesopelagic Zone
Deep water
Bottom
F ratio, new production,Pk communitiesC Export production
C remineralization
Water mass pathway+
Better constrain the Baxs proxy
Bad
Atmosphere
100m
1000m
Multi-proxy approach to assess C export and mineralization
CO2
Analytical part:
* Isotope dilution method
* ICP-MS and HR-ICP-MS instruments
(inductively coupled plasma mass spectrometry)
* Optimization of the method on the HR-ICP-MS instrument
30°S
40°S
50°S
60°S
20°S
Anta rc tic
Peninsula
Ka p pNorve g iaWe d d e ll Ba sin
Sc o tia Sea
So uthSa nd wic hIsla nd s
So uth G e org ia
South Sc otia Rid g e
End e rb y Ba sin
Southwest Ind ia n Ridge
North We d d e ll Rid g e
70°W
60°W
50°W
40°W30°W 20°W 10°W
0°
10°E
20°E
30°E
70°S
70°S
60°S
60°S
50°S
50°S
Anta rc tic a
NM
M a ud Rise
J
J o invilleIsla nd
Ba sin Powe ll
ANT XXII/3; Weddell sea
Master Thesis proposal2006-2007
“ Dissolved barium to investigate the water mass pathways in the Southern Ocean and better constrain the Baxs proxy “
Analysis of dissolved Barium in seawater and comparison of Ba results with the other physical and biogeochemical water mass properties.
If you’re interested in•Analytical chemistry & biogeochemistry
•The southern Ocean•The global C cycle & climatic changes
If you’re interested in doing research
... Fell free to contact us with any questions !
Thank you
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