Particulate organic carbon fluxes to the ocean interior and factors controlling the biological pump: A synthesis of global sediment trap programs since 1983

Honjo, Susumu; Manganini, Steven J.; Krishfield, Richard A.; François, Roger

doi:10.1016/j.pocean.2007.11.003

Cited by 550 publications

(538 citation statements)

References 223 publications

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“…Although the broad pattern is similar to that found in sediment traps ( Figure 2c; Dymond and Lyle 1994;Honjo et al 1995;Honjo et al 2008), the abrupt increase from 1˚N to the equator is different and similar in magnitude to that of the Ψ--values. (Sager 2007), more modest movements within the precision of the paleomagnetic method (typically 2˚--3˚) are possible.…”

Section: Introductionsupporting

confidence: 76%

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Evaluating Cenozoic equatorial sediment deposition anomalies for potential paleoceanographic and Pacific plate motion applications

Mitchell

Dubois

2013

Mar Geophys Res

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If equatorial sediments form characteristic deposits around the equator, they may help to resolve the amount of northwards drift of the Pacific tectonic plate.Relevant to this issue, it has been shown that 230 Th has been accumulating on the equatorial seabed faster than its production from radioactive decay in the overlying water column during the Holocene (Marcantonio et al., 2001). Some researchers have argued that this reflects the deposition of particles with adsorbed 230 Th carried by bottom currents towards the equator ("focusing"). If correct, this effect may combine with high pelagic productivity, which is also centered on the equator, to yield a characteristic signature of high accumulation rates marking the paleoequator in older deposits.Here we evaluate potential evidence that such an equatorial feature existed in the geological past. Seismic reflection data from seven meridional transects suggest that a band of equatorially enhanced accumulation of

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Section: Introductionsupporting

confidence: 76%

“…They also showed that the particle flux effect is unlikely to explain the high equatorial Ψ--values because particle fluxes in sediment traps (Honjo et al 2008) are elevated over a broader latitude extent (~10˚) than the elevated Ψ--values.…”

Section: Introductionmentioning

confidence: 99%

Evaluating Cenozoic equatorial sediment deposition anomalies for potential paleoceanographic and Pacific plate motion applications

Mitchell

Dubois

2013

Mar Geophys Res

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“…Additionally, water depth plays an important role for organic matter degradation. Particle-associated bacteria degrade organic compounds from sinking particles, leading to the production of dissolved OM (Honjo et al, 2008 and references therein), while breaking the sinking particles into smaller, suspended OM, thus reducing the overall organic matter particle flux and inducing compositional changes.…”

Section: Organic Matter and C/n Ratiomentioning

confidence: 99%

Geochemical distribution patterns as indicators for productivity and terrigenous input off NW Africa

Plewa

Meggers

Kuhlmann

et al. 2012

Deep Sea Research Part I: Oceanographic Research Papers

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a b s t r a c tOne hundred and twenty-eight surface-sediment samples collected off North-West Africa were studied geochemically to detect the expressions of different meridional climate regimes and zonal productivity gradients in the surface sediments. This geochemical multi-tracer approach, coupled with additional information on the bulk carbonate and TOC contents makes it possible to characterise the sedimentological regime in detail. Typical terrigenous elements like Al, K and Fe mirror the importance of the humid (fluvial) influence in the north of the study area and the dominance of aeolian input in the south. Furthermore, the distributions of Ti and Fe in the surface sediments serve as tracers for the supply of eolian volcanic material from the Canary Islands. The spatial variability of the TOC contents in the surface sediments closely follows the ocean surface productivity patterns, whereas the CaCO 3 contents are mainly controlled by dilution with terrigenous matter. The potential productivity proxy Ba is not a reliable tracer for productivity in this region, since it is mainly supplied by terrigenous input (coupled with aluminosilicates).

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“…In this context, the study by Salter et al (2014) quantified a carbonate counter pump effect accounting for 6-32% of measured POC fluxes with a notable contribution from foraminifer species (mainly Globigerina bulloides and N. pachyderma) in iron-fertilized waters downstream of the Crozet Islands. Several studies have reported geochemical transitions in particle stoichiometry across the Polar Front (Trull et al, 2001;Honjo et al, 2008), highlighting the importance of regional variability for a Southern Ocean carbonate counter pump that is partly linked to the biogeography of calcareous organisms (Salter et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Planktic foraminifer and coccolith contribution to carbonate export fluxes over the central Kerguelen Plateau

Rembauville

Meilland

Ziveri

et al. 2016

Deep Sea Research Part I: Oceanographic Research Papers

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a b s t r a c tWe report the contribution of planktic foraminifers and coccoliths to the particulate inorganic carbon (PIC) export fluxes collected over an annual cycle (October 2011/September 2012) on the central Kerguelen Plateau in the Antarctic Zone (AAZ) south of the Polar Front (PF). The seasonality of PIC flux was decoupled from surface chlorophyll a concentration and particulate organic carbon (POC) fluxes and was characterized by a late summer (February) maximum. This peak was concomitant with the highest satellite-derived sea surface PIC and corresponded to a Emiliania huxleyi coccoliths export event that accounted for 85% of the annual PIC export. The foraminifer contribution to the annual PIC flux was much lower (15%) and dominated by Turborotalita quinqueloba and Neogloboquadrina pachyderma. Foraminifer export fluxes were closely related to the surface chlorophyll a concentration, suggesting food availability as an important factor regulating the foraminifer's biomass. We compared size-normalized test weight (SNW) of the foraminifers with previously published SNW from the Crozet Islands using the same methodology and found no significant difference in SNW between sites for a given species. However, the SNW was significantly species-specific with a threefold increase from T. quinqueloba to Globigerina bulloides. The annual PIC:POC molar ratio of 0.07 was close to the mean ratio for the global ocean and lead to a low carbonate counter pump effect ( $ 5%) compared to a previous study north of the PF (6-32%). We suggest that lowers counter pump effect south of the PF despite similar productivity levels is due to a dominance of coccoliths in the PIC fluxes and a difference in the foraminifers species assemblage with a predominance of polar species with lower SNW.

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Particulate organic carbon fluxes to the ocean interior and factors controlling the biological pump: A synthesis of global sediment trap programs since 1983

Cited by 550 publications

References 223 publications

Evaluating Cenozoic equatorial sediment deposition anomalies for potential paleoceanographic and Pacific plate motion applications

Evaluating Cenozoic equatorial sediment deposition anomalies for potential paleoceanographic and Pacific plate motion applications

Geochemical distribution patterns as indicators for productivity and terrigenous input off NW Africa

Planktic foraminifer and coccolith contribution to carbonate export fluxes over the central Kerguelen Plateau

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