Alvarez-Salgado, Xose Anton; Pérez, Fiz F; Ríos, Aida F; Doval, María Dolores (2001): Part of the global DOC versus AOU (dissolved organic carbon/apparent oxygen utilization) data compilation, WOCE14 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.807697, Supplement to: Alvarez-Salgado, XA et al. (2001): Basin-scale changes of total organic carbon profiles in the eastern South Atlantic. Scientia Marina, 65(1), 1-10, https://doi.org/10.3989/scimar.2001.65n11
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Abstract:
Total organic carbon (TOC) samples were collected at 6 stations spaced ~800 km apart in the eastern South Atlantic, from the Equator to 45°S along 9°W. Analyses were performed by high temperature catalytic oxidation (HTCO) in the base laboratory. Despite the complex advection and mixing patterns of North Atlantic and Antarctic waters with extremely different degrees of ventilation, TOC levels below 500 m are quasi-constant at 55±3 µmol C/l, pointing to the refractory nature of deep-water TOC. On the other hand, a TOC excess from 25 to 38 g C/m**2 is observed in the upper 100 m of the permanently stratified nutrient-depleted Equatorial, Subequatorial and Subtropical upper ocean, where vertical turbulent diffusion is largely prevented. Conversely, TOC levels in the nutrient-rich upper layer of the Subantarctic Front only exceeds 9 g C/m**2 the deep-water baseline. As much as 70% of the TOC variability in the upper 500 m is due to simple mixing of reactive TOC formed in the surface layer and refractory TOC in deep ocean waters, with a minor contribution (13%) to oxygen consumption in the prominent subsurface AOU maximum at 200-400 m depth.
Related to:
Arístegui, Javier; Duarte, Carlos Manuel; Agustí, Susana; Doval, María Dolores; Alvarez-Salgado, Xose Anton; Hansell, Dennis A (2002): Dissolved organic carbon support of respiration in the dark ocean. Science, 298(5600), 1967, https://doi.org/10.1126/science.1076746
Project(s):
Joint Global Ocean Flux Study (JGOFS)
Coverage:
Median Latitude: -22.550000 * Median Longitude: -8.566667 * South-bound Latitude: -45.000000 * West-bound Longitude: -9.000000 * North-bound Latitude: -0.300000 * East-bound Longitude: -7.000000
Minimum DEPTH, water: 3 m * Maximum DEPTH, water: 990 m
Event(s):
WOCEA14-16 * Latitude: -0.300000 * Longitude: -7.000000 * Location: Eastern South Atlantic * Campaign: JGOFS_not_specified
WOCEA14-31 * Latitude: -7.500000 * Longitude: -8.400000 * Location: Eastern South Atlantic * Campaign: JGOFS_not_specified
WOCEA14-46 * Latitude: -15.000000 * Longitude: -9.000000 * Location: Eastern South Atlantic * Campaign: JGOFS_not_specified
Comment:
compilation by Xose Anton Alvarez-Salgado (xsalgado@iim.csic.es)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Date/Time of event | Date/Time | ||||
| 3 | Latitude of event | Latitude | ||||
| 4 | Longitude of event | Longitude | ||||
| 5 | DEPTH, water | Depth water | m | Geocode | ||
| 6 | Temperature, water | Temp | °C | Alvarez-Salgado, Xose Anton | ||
| 7 | Oxygen, apparent utilization | AOU | µmol/l | Alvarez-Salgado, Xose Anton | ||
| 8 | Carbon, organic, dissolved | DOC | µmol/l | Alvarez-Salgado, Xose Anton | ||
| 9 | Bottle number | Bottle | Alvarez-Salgado, Xose Anton |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
144 data points