Romero, Oscar E; Boeckel, Babette; Donner, Barbara; Lavik, Gaute; Fischer, Gerhard; Wefer, Gerold (2002): Flux data of NU2_trap (Table A1) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.115823, Supplement to: Romero, OE et al. (2002): Seasonal productivity dynamics in the pelagic central Benguela System inferred from the flux of carbonate and silicate organisms. Journal of Marine Systems, 37(4), 259-278, https://doi.org/10.1016/S0924-7963(02)00189-6
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Published: 2002 (exact date unknown) • DOI registered: 2005-02-17
Abstract:
Flux of bulk components, carbonate- and silicate-bearing skeleton organisms, and the d15N-isotopic signal were investigated on a 1-year time-series sediment trap deployed at the pelagic NU mooring site (Namibia Upwelling, ca. 29°S, 13°E) in the central Benguela System. The flux of bulk components mostly shows bimodal seasonality with major peaks in austral summer and winter, and moderate to low export in austral fall and spring. The calcium carbonate fraction dominates the export of particulates throughout the year, followed by lithogenic and biogenic opal. Planktonic foraminifera and coccolithophorids are major components of the carbonate fraction, while diatoms clearly dominate the biogenic opal fraction. Bulk d15N isotopic composition of particulate matter is positively correlated with the total mass flux during summer and fall, while negatively correlated during winter and spring. Seasonal changes in the intensity of the main oceanographic processes affecting the NU site are inferred from variations in bulk component flux, and in the flux and diversity patterns of individual species or group of species. Influence from the Namaqua (Hondeklip) upwelling cell through offshore migration of chlorophyll filaments is stronger in summer, while the winter flux maximum seems to reflect mainly in situ production, with less influence from the coastal and shelf upwelling areas. On a yearly basis, dominant microorganisms correspond well with the flora and fauna of tropical/subtropical waters, with minor contribution of near-shore organisms. The simultaneous occurrence of species with different ecological affinities mirrors the fact that the mooring site was located in a transitional region with large hydrographic variability over short-time intervals.
Project(s):
Coverage:
Latitude: -29.200000 * Longitude: 13.116700
Date/Time Start: 1992-01-20T12:00:00 * Date/Time End: 1993-01-15T12:00:00
Minimum DEPTH, water: 2516 m * Maximum DEPTH, water: 2516 m
Event(s):
NU2_trap (NU) * Latitude: -29.200000 * Longitude: 13.116700 * Date/Time: 1992-01-20T00:00:00 * Elevation: -3055.0 m * Location: Namibia upwelling, Southeast Atlantic * Campaign: M20/2 * Basis: Meteor (1986) * Method/Device: Trap, sediment (TRAPS)
Parameter(s):
# | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
---|---|---|---|---|---|---|
1 | DEPTH, water | Depth water | m | Geocode | ||
2 | DATE/TIME | Date/Time | Geocode | |||
3 | Date/time end | Date/time end | Romero, Oscar E | |||
4 | Duration, number of days | Duration | days | Romero, Oscar E | Calculated | |
5 | Sample code/label | Sample label | Romero, Oscar E | |||
6 | Total mass, flux per day | Tot mass flux | mg/m2/day | Romero, Oscar E | Calculated, see reference(s) | |
7 | Calcium carbonate, flux | CaCO3 flux | mg/m2/day | Romero, Oscar E | Element analyser CHN, Heraeus | |
8 | Lithogenic, flux | Litho flux | mg/m2/day | Romero, Oscar E | Calculated, see reference(s) | |
9 | Opal, flux | bSiO2 flux | mg/m2/day | Romero, Oscar E | Opal, auto analysis (Müller & Schneider, 1993) | |
10 | Carbon, organic, particulate, flux | POC flux | mg/m2/day | Romero, Oscar E | Element analyser CHN, Heraeus | |
11 | Calcium carbonate, flux of total flux | CaCO3 flux | % | Romero, Oscar E | Calculated, see reference(s) | |
12 | Lithogenic, flux of total flux | Litho flux | % | Romero, Oscar E | Calculated, see reference(s) | |
13 | Opal, flux of total flux | bSiO2 flux | % | Romero, Oscar E | Calculated, see reference(s) | |
14 | Carbon, organic, particulate, flux of total flux | POC flux | % | Romero, Oscar E | Calculated, see reference(s) | |
15 | δ15N, gas | δ15N-N2 | ‰ air | Romero, Oscar E | Mass spectrometer Finnigan Delta Plus | |
16 | Coccolith, fluxes | Coccolith fluxes | 106 #/m2/day | Romero, Oscar E | Calculated, see reference(s) | |
17 | Emiliania huxleyi, flux | E. huxleyi flux | 106 #/m2/day | Romero, Oscar E | Calculated, see reference(s) | Coccolithen |
18 | Emiliania huxleyi, flux | E. huxleyi flux | 106 #/m2/day | Romero, Oscar E | Calculated, see reference(s) | Coccospheres |
19 | Elphidium advenum | E. advenum | % | Romero, Oscar E | Calculated, see reference(s) | Coccolithen |
20 | Calcidiscus leptoporus, flux | C. leptoporus flux | 106 #/m2/day | Romero, Oscar E | Calculated, see reference(s) | Coccolithen |
21 | Calcidiscus leptoporus, flux | C. leptoporus flux | 106 #/m2/day | Romero, Oscar E | Calculated, see reference(s) | Coccospheres |
22 | Calcidiscus leptoporus | C. leptoporus | % | Romero, Oscar E | Calculated, see reference(s) | Coccolithen |
23 | Calcidiscus leptoporus | C. leptoporus | % | Romero, Oscar E | Calculated, see reference(s) | Coccospheres |
24 | Syracosphaera lamina, flux | S. lamina flux | 106 #/m2/day | Romero, Oscar E | Calculated, see reference(s) | Coccolithen |
25 | Syracosphaera lamina, flux | S. lamina flux | 106 #/m2/day | Romero, Oscar E | Calculated, see reference(s) | Coccospheres |
26 | Syracosphaera lamina | S. lamina | % | Romero, Oscar E | Calculated, see reference(s) | Coccolithen |
27 | Syracosphaera lamina | S. lamina | % | Romero, Oscar E | Calculated, see reference(s) | Coccospheres |
28 | Gladiolithus flabellatus, flux | G. flabellatus flux | 106 #/m2/day | Romero, Oscar E | Calculated, see reference(s) | Coccolithen |
29 | Gladiolithus flabellatus | G. flabellatus | % | Romero, Oscar E | Calculated, see reference(s) | Coccolithen |
30 | Coccospheres, flux | Coccosp flux | 106 #/m2/day | Romero, Oscar E | Calculated, see reference(s) | Coccolithen |
31 | Emiliania huxleyi | E. huxleyi | % | Romero, Oscar E | Calculated, see reference(s) | Coccospheres |
32 | Oolithotus fragilis | O. fragilis | % | Romero, Oscar E | Calculated, see reference(s) | Coccospheres |
33 | Oolithotus fragilis, flux | O. fragilis flux | 106 #/m2/day | Romero, Oscar E | Calculated, see reference(s) | Coccospheres |
34 | Foraminifera, planktic, flux | Foram plankt flux | #/m2/day | Romero, Oscar E | Calculated, see reference(s) | Foraminifera (>150 µm) |
35 | Globorotalia inflata | G. inflata | % | Romero, Oscar E | Calculated, see reference(s) | Foraminifera (>150 µm) |
36 | Globorotalia inflata, flux | G. inflata flux | #/m2/day | Romero, Oscar E | Calculated, see reference(s) | Foraminifera (>150 µm) |
37 | Neogloboquadrina pachyderma dextral | N. pachyderma d | % | Romero, Oscar E | Calculated, see reference(s) | Foraminifera (>150 µm) |
38 | Neogloboquadrina pachyderma dextral, flux | N. pachyderma d flux | #/m2/day | Romero, Oscar E | Calculated, see reference(s) | Foraminifera (>150 µm) |
39 | Globigerina bulloides | G. bulloides | % | Romero, Oscar E | Calculated, see reference(s) | Foraminifera (>150 µm) |
40 | Globigerina bulloides, flux | G. bulloides flux | #/m2/day | Romero, Oscar E | Calculated, see reference(s) | Foraminifera (>150 µm) |
41 | Orbulina universa | O. universa | % | Romero, Oscar E | Calculated, see reference(s) | Foraminifera (>150 µm) |
42 | Orbulina universa, flux | O. universa flux | #/m2/day | Romero, Oscar E | Calculated, see reference(s) | Foraminifera (>150 µm) |
43 | Globigerinoides ruber white | G. ruber w | % | Romero, Oscar E | Calculated, see reference(s) | Foraminifera (>150 µm) |
44 | Globigerinoides ruber white, flux | G. ruber w flux | #/m2/day | Romero, Oscar E | Calculated, see reference(s) | Foraminifera (>150 µm) |
45 | Diatom valves, flux | Diatom valv flux | #/m2/day | Romero, Oscar E | Calculated, see reference(s) | |
46 | Fragilariopsis doliolus | F. doliolus | % | Romero, Oscar E | Calculated, see reference(s) | |
47 | Fragilariopsis doliolus, flux | F. doliolus flux | 106 #/m2/day | Romero, Oscar E | Calculated, see reference(s) | |
48 | Actinocyclus curvatulus | A. curvatulus | % | Romero, Oscar E | Calculated, see reference(s) | |
49 | Actinocyclus curvatulus, flux | A. curvatulus flux | 106 #/m2/day | Romero, Oscar E | Calculated, see reference(s) | |
50 | Azpeitia spp. | Azpeitia spp. | % | Romero, Oscar E | Calculated, see reference(s) | |
51 | Azpeitia spp., flux | Azpeitia spp. flux | 106 #/m2/day | Romero, Oscar E | Calculated, see reference(s) | |
52 | Coscinodiscus radiatus | C. radiatus | % | Romero, Oscar E | Calculated, see reference(s) | |
53 | Coscinodiscus radiatus, flux | C. radiatus flux | 106 #/m2/day | Romero, Oscar E | Calculated, see reference(s) | |
54 | Actinocyclus octonarius | A. octonarius | % | Romero, Oscar E | Calculated, see reference(s) | |
55 | Actinocyclus octonarius, flux | A. octonarius flux | 106 #/m2/day | Romero, Oscar E | Calculated, see reference(s) | |
56 | Thalassionema nitzschioides var. inflata | T. nitzschioides var. inflata | % | Romero, Oscar E | Calculated, see reference(s) | |
57 | Thalassionema nitzschioides, flux | T. nitzschioides flux | 106 #/m2/day | Romero, Oscar E | Calculated, see reference(s) | T. nitzschioides var. inflata |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
1100 data points