Abstract
The international GEOVIDE expedition (GEOTRACES
GA01, May-June 2014, spring period) aims at providing a
better understanding on key trace metal biogeochemical cycles
in the North Atlantic. Sampling was undertaken within
different biogeochemical provinces including the Iberian
Margin, the West European Basin, Reykjanes Ridge, Irminger
Sea, Greenland Margin and the Labrador Sea showing
contrasted physical, biological and chemical characteristics.
Some of these areas are known to present an important spring
phytoplankton bloom leading to the export of particles, but
large uncertainties remain about the remineralization processes
affecting the sinking particles. In this study, the inventories of
the excess, non-lithogenic particulate barium (Baxs) proxy
were determined at 12 stations in order to assess mesopelagic
carbon remineralization (Dehairs et al., 1997). Baxs profiles
display maximum values in the mesopelagic zone and range
from 500 (Greenland Margin) to 1800 pmol.L-1 (West
European Basin) suggesting a large variation in the magnitude
of the remineralization processes. Remineralization fluxes of
carbon in the North Atlantic will be discussed with the aim of
determining if this area is efficient to transfer carbon in the
deep ocean
GA01, May-June 2014, spring period) aims at providing a
better understanding on key trace metal biogeochemical cycles
in the North Atlantic. Sampling was undertaken within
different biogeochemical provinces including the Iberian
Margin, the West European Basin, Reykjanes Ridge, Irminger
Sea, Greenland Margin and the Labrador Sea showing
contrasted physical, biological and chemical characteristics.
Some of these areas are known to present an important spring
phytoplankton bloom leading to the export of particles, but
large uncertainties remain about the remineralization processes
affecting the sinking particles. In this study, the inventories of
the excess, non-lithogenic particulate barium (Baxs) proxy
were determined at 12 stations in order to assess mesopelagic
carbon remineralization (Dehairs et al., 1997). Baxs profiles
display maximum values in the mesopelagic zone and range
from 500 (Greenland Margin) to 1800 pmol.L-1 (West
European Basin) suggesting a large variation in the magnitude
of the remineralization processes. Remineralization fluxes of
carbon in the North Atlantic will be discussed with the aim of
determining if this area is efficient to transfer carbon in the
deep ocean
| Original language | English |
|---|---|
| Title of host publication | Goldschmidt 2015 Prague CZ August 16-21 |
| Publication status | Published - 2015 |
| Event | Goldschmidt 2015 - Prague, Czech Republic Duration: 16 Aug 2015 → 21 Aug 2015 |
Conference
| Conference | Goldschmidt 2015 |
|---|---|
| Country/Territory | Czech Republic |
| City | Prague |
| Period | 16/08/15 → 21/08/15 |