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Romero, Oscar E; Boeckel, Babette; Donner, Barbara; Lavik, Gaute; Fischer, Gerhard; Wefer, Gerold (2002): Flux data of NU2_trap (Table A1). 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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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.
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) * Device: Trap, sediment (TRAPS)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1DEPTH, waterDepth watermGeocode
2DATE/TIMEDate/TimeGeocode
3Date/time endDate/time endRomero, Oscar E
4Duration, number of daysDurationdaysRomero, Oscar ECalculated
5Sample code/labelSample labelRomero, Oscar E
6Total mass flux per dayMass fluxmg/m2/dayRomero, Oscar ECalculated, see reference(s)
7Calcium carbonate fluxCaCO3 fluxmg/m2/dayRomero, Oscar EElement analyser CHN, Heraeus
8Lithogenic flux per dayLitho fluxmg/m2/dayRomero, Oscar ECalculated, see reference(s)
9Opal fluxbSiO2 fluxmg/m2/dayRomero, Oscar EOpal, auto analysis (Müller & Schneider, 1993)
10Carbon, organic, particulate flux per dayPOC fluxmg/m2/dayRomero, Oscar EElement analyser CHN, Heraeus
11Calcium carbonate flux of total fluxCaCO3 flux%Romero, Oscar ECalculated, see reference(s)
12Lithogenic flux of total fluxLitho flux%Romero, Oscar ECalculated, see reference(s)
13Opal flux of total fluxbSiO2 flux%Romero, Oscar ECalculated, see reference(s)
14Carbon, organic, particulate flux of total fluxPOC flux%Romero, Oscar ECalculated, see reference(s)
15delta 15N, gasd15N gasper mil airRomero, Oscar EMass spectrometer Finnigan Delta Plus
16Coccolith fluxesCoccolith fluxes106 #/m2/dayRomero, Oscar ECalculated, see reference(s)
17Emiliania huxleyi fluxE. huxleyi flux106 #/m2/dayRomero, Oscar ECalculated, see reference(s)Coccolithen
18Emiliania huxleyi fluxE. huxleyi flux106 #/m2/dayRomero, Oscar ECalculated, see reference(s)Coccospheres
19Elphidium advenumE. advenum%Romero, Oscar ECalculated, see reference(s)Coccolithen
20Calcidiscus leptoporus fluxC. leptoporus flux106 #/m2/dayRomero, Oscar ECalculated, see reference(s)Coccolithen
21Calcidiscus leptoporus fluxC. leptoporus flux106 #/m2/dayRomero, Oscar ECalculated, see reference(s)Coccospheres
22Calcidiscus leptoporusC. leptoporus%Romero, Oscar ECalculated, see reference(s)Coccolithen
23Calcidiscus leptoporusC. leptoporus%Romero, Oscar ECalculated, see reference(s)Coccospheres
24Syracosphaera lamina fluxS. lamina flux106 #/m2/dayRomero, Oscar ECalculated, see reference(s)Coccolithen
25Syracosphaera lamina fluxS. lamina flux106 #/m2/dayRomero, Oscar ECalculated, see reference(s)Coccospheres
26Syracosphaera laminaS. lamina%Romero, Oscar ECalculated, see reference(s)Coccolithen
27Syracosphaera laminaS. lamina%Romero, Oscar ECalculated, see reference(s)Coccospheres
28Gladiolithus flabellatus fluxG. flabellatus flux106 #/m2/dayRomero, Oscar ECalculated, see reference(s)Coccolithen
29Gladiolithus flabellatusG. flabellatus%Romero, Oscar ECalculated, see reference(s)Coccolithen
30Coccospheres fluxCoccosp flux106 #/m2/dayRomero, Oscar ECalculated, see reference(s)Coccolithen
31Emiliania huxleyiE. huxleyi%Romero, Oscar ECalculated, see reference(s)Coccospheres
32Oolithotus fragilisO. fragilis%Romero, Oscar ECalculated, see reference(s)Coccospheres
33Oolithotus fragilis fluxO. fragilis flux106 #/m2/dayRomero, Oscar ECalculated, see reference(s)Coccospheres
34Foraminifera, planktic fluxForam plankt flux#/m2/dayRomero, Oscar ECalculated, see reference(s)Foraminifera (>150 µm)
35Globorotalia inflataG. inflata%Romero, Oscar ECalculated, see reference(s)Foraminifera (>150 µm)
36Globorotalia inflata fluxG. inflata flux#/m2/dayRomero, Oscar ECalculated, see reference(s)Foraminifera (>150 µm)
37Neogloboquadrina pachyderma dextralN. pachyderma d%Romero, Oscar ECalculated, see reference(s)Foraminifera (>150 µm)
38Neogloboquadrina pachyderma dextral fluxN. pachyderma d flux#/m2/dayRomero, Oscar ECalculated, see reference(s)Foraminifera (>150 µm)
39Globigerina bulloidesG. bulloides%Romero, Oscar ECalculated, see reference(s)Foraminifera (>150 µm)
40Globigerina bulloides fluxG. bulloides flux#/m2/dayRomero, Oscar ECalculated, see reference(s)Foraminifera (>150 µm)
41Orbulina universaO. universa%Romero, Oscar ECalculated, see reference(s)Foraminifera (>150 µm)
42Orbulina universa fluxO. universa flux#/m2/dayRomero, Oscar ECalculated, see reference(s)Foraminifera (>150 µm)
43Globigerinoides ruber whiteG. ruber w%Romero, Oscar ECalculated, see reference(s)Foraminifera (>150 µm)
44Globigerinoides ruber white fluxG. ruber w flux#/m2/dayRomero, Oscar ECalculated, see reference(s)Foraminifera (>150 µm)
45Diatom valves fluxDiatom valv flux#/m2/dayRomero, Oscar ECalculated, see reference(s)
46Fragilariopsis doliolusF. doliolus%Romero, Oscar ECalculated, see reference(s)
47Fragilariopsis doliolus fluxF. doliolus flux106 #/m2/dayRomero, Oscar ECalculated, see reference(s)
48Actinocyclus curvatulusA. curvatulus%Romero, Oscar ECalculated, see reference(s)
49Actinocyclus curvatulus fluxA. curvatulus flux106 #/m2/dayRomero, Oscar ECalculated, see reference(s)
50Azpeitia spp.Azpeitia spp.%Romero, Oscar ECalculated, see reference(s)
51Azpeitia spp. fluxAzpeitia spp. flux106 #/m2/dayRomero, Oscar ECalculated, see reference(s)
52Coscinodiscus radiatusC. radiatus%Romero, Oscar ECalculated, see reference(s)
53Coscinodiscus radiatus fluxC. radiatus flux106 #/m2/dayRomero, Oscar ECalculated, see reference(s)
54Actinocyclus octonariusA. octonarius%Romero, Oscar ECalculated, see reference(s)
55Actinocyclus octonarius fluxA. octonarius flux106 #/m2/dayRomero, Oscar ECalculated, see reference(s)
56Thalassionema nitzschioides var. inflataT. nitzschioides var. inflata%Romero, Oscar ECalculated, see reference(s)
57Thalassionema nitzschioides fluxT. nitzschioides flux106 #/m2/dayRomero, Oscar ECalculated, see reference(s)T. nitzschioides var. inflata
Size:
1100 data points

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