Accumulation of organic carbon in the upwelling area off Northwest Africa (ODP-Leg 108)

2005 ◽  
pp. 85-143
Keyword(s):  
Organic Carbon ◽  
Northwest Africa ◽  
Upwelling Area

scholarly journals Mass, nutrients and dissolved organic carbon (DOC) lateral transports off northwest Africa during fall 2002 and spring 2003

Ocean Science ◽  
2020 ◽  
Vol 16 (2) ◽  
pp. 483-511 ◽  
Author(s):  
Nadia Burgoa ◽  
Francisco Machín ◽  
Ángeles Marrero-Díaz ◽  
Ángel Rodríguez-Santana ◽  
Antonio Martínez-Marrero ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Mass Transport ◽  
Dissolved Organic Carbon ◽  
Inorganic Nutrients ◽  
Southern Boundary ◽  
Northwest Africa ◽  
Circulation Patterns ◽  
In Situ Observations ◽  
The Impact

Abstract. The circulation patterns and the impact of the lateral export of nutrients and organic matter off NW Africa are examined by applying an inverse model to two hydrographic datasets gathered in fall 2002 and spring 2003. These estimates show significant changes in the circulation patterns at central levels from fall to spring, particularly in the southern boundary of the domain related to zonal shifts of the Cape Verde Frontal Zone. Southward transports at the surface and central levels at 26∘ N are 5.6±1.9 Sv in fall and increase to 6.7±1.6 Sv in spring; westward transports at 26∘ W are 6.0±1.8 Sv in fall and weaken to 4.0±1.8 Sv in spring. At 21∘ N a remarkable temporal variability is obtained, with a northward mass transport of 4.4±1.5 Sv in fall and a southward transport of 5.2±1.6 Sv in spring. At intermediate levels important spatiotemporal differences are also observed, and it must be highlighted that a northward net mass transport of 2.0±1.9 Sv is obtained in fall at both the south and north transects. The variability in the circulation patterns is also reflected in lateral transports of inorganic nutrients (SiO2, NO3, PO4) and dissolved organic carbon (DOC). Hence, in fall the area acts as a sink of inorganic nutrients and a source of DOC, while in spring it reverses to a source of inorganic nutrients and a sink of DOC. A comparison between nutrient fluxes from both in situ observations and numerical modeling output is finally addressed.

Productivity cycles in the coastal upwelling area off Concepción: The importance of diatoms and bacterioplankton in the organic carbon flux

2007 ◽  
Vol 75 (3) ◽  
pp. 518-530 ◽  
Author(s):  
Paulina Montero ◽  
Giovanni Daneri ◽  
L. Antonio Cuevas ◽  
Humberto E. González ◽  
Bárbara Jacob ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Carbon Flux ◽  
Coastal Upwelling ◽  
Organic Carbon Flux ◽  
Upwelling Area
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