Revisiting Carbon Flux Through the Ocean's Twilight Zone

  title={Revisiting Carbon Flux Through the Ocean's Twilight Zone},
  author={Ken O. Buesseler and Carl H. Lamborg and Philip W. Boyd and Phoebe J. Lam and Thomas W. Trull and Robert R. Bidigare and J. K. B. Bishop and Karen L. Casciotti and Frank Dehairs and Marc Elskens and Makio C. Honda and David M. Karl and David A. Siegel and Mary Wilcox Silver and Deborah K. Steinberg and Jim Valdes and Benjamin A. S. Van Mooy and Stephanie E. Wilson},
  pages={567 - 570}
The oceanic biological pump drives sequestration of carbon dioxide in the deep sea via sinking particles. Rapid biological consumption and remineralization of carbon in the “twilight zone” (depths between the euphotic zone and 1000 meters) reduce the efficiency of sequestration. By using neutrally buoyant sediment traps to sample this chronically understudied realm, we measured a transfer efficiency of sinking particulate organic carbon between 150 and 500 meters of 20 and 50% at two… 
Reconciliation of the carbon budget in the ocean’s twilight zone
It is found that prokaryotes are responsible for 70 to 92 per cent of the estimated remineralization in the twilight zone despite the fact that much of the organic carbon is exported in the form of large, fast-sinking particles accessible to larger zooplankton.
Rapid oxygen utilization in the ocean twilight zone assessed with the cosmogenic isotope 7Be
  • D. Kadko
  • Environmental Science, Geology
  • 2009
The rate of oxygen utilization beneath the sunlit surface ocean provides a measure of the export rate of biologically produced carbon to the deep sea, and its variation with depth suggests where
A new look at ocean carbon remineralization for estimating deepwater sequestration
The “biological carbon pump” causes carbon sequestration in deep waters by downward transfer of organic matter, mostly as particles. This mechanism depends to a great extent on the uptake of CO2 by
Attenuation of particulate organic carbon flux in the Scotia Sea, Southern Ocean, is controlled by zooplankton fecal pellets
The Southern Ocean (SO) is an important CO2 reservoir, some of which enters via the production, sinking, and remineralization of organic matter. Recent work suggests that the fraction of production
Attenuation of sinking particulate organic carbon flux through the mesopelagic ocean
There is a significant relationship between the remineralization depth of sinking organic carbon flux in the upper ocean and water temperature, with shallower reminalization in warmer waters, suggesting that predicted future increases in ocean temperature will result in reduced CO2 storage by the oceans.
Multi-faceted particle pumps drive carbon sequestration in the ocean
It is proposed that these ‘particle injection pumps’ probably sequester as much carbon as the gravitational pump, helping to close the carbon budget and motivating further investigation into their environmental control.
Seasonal copepod lipid pump promotes carbon sequestration in the deep North Atlantic
It is shown that one species, the copepod Calanus finmarchicus overwintering in the North Atlantic, sequesters an amount of carbon equivalent to the sinking flux of detrital material.
Carbon export and transfer to depth across the Southern Ocean Great Calcite Belt
Abstract. Sequestration of carbon by the marine biological pump depends on the processes that alter, remineralize, and preserve particulate organic carbon (POC) during transit to the deep ocean.
Ecosystem controls on carbon export efficiency from the naturally iron-fertilised phytoplankton bloom over the Kerguelen Plateau
In the ocean, the perpetual 'snowfall' of biogenic marine particles exports organic carbon from the well-lit surface layer to the deep sediments, promoting its sequestration. The efficiency of this
Observations and modeling of slow‐sinking particles in the twilight zone
The biological carbon pump (BCP) transfers carbon from the surface ocean into the oceans' interior, mainly in the form of sinking particles with an organic component, and thereby keeps atmospheric


Sensitivity of ocean carbon tracer distributions to particulate organic flux parameterizations
Vertical fluxes of particulate organic carbon (POC) from the euphotic zone to the deep sea are an important part of the carbon cycle in the oceans. In this study, oceanic fluxes of POC below the
Factors controlling the flux of organic carbon to the bathypelagic zone of the ocean
Particle fluxes measured with time series sediment traps deployed below 2000 m at 68 sites in the world ocean are combined with satellite‐derived estimates of export production from the overlying
Impact of Anthropogenic CO2 on the CaCO3 System in the Oceans
The in situ CaCO3 dissolution rates for the global oceans from total alkalinity and chlorofluorocarbon data are estimated, and the future impacts of anthropogenic CO2 on Ca CO3 shell–forming species are discussed.
Response of diatoms distribution to global warming and potential implications: A global model study
Using a global model of ocean biogeochemistry coupled to a climate model, we explore the effect of climate change on the distribution of diatoms, a key phytoplankton functional group. Our model
Biological Pump in Northwestern North Pacific
The northwestern North Pacific is considered to be one of the most productive areas in the global ocean. Although the marginal zones along the Japanese and Kuril islands, Kamchatka Peninsula, and
The role of the vertical fluxes of particulate organic matter and calcite in the oceanic carbon cycle: Studies using an ocean biogeochemical general circulation model
Distributions of chemical tracers in the world ocean are well reproduced in an ocean general circulation model which includes biogeochemical processes (biogeochemical general circulation model,
Association of sinking organic matter with various types of mineral ballast in the deep sea: Implications for the rain ratio
We compiled and standardized sediment trap data below 1000 m depth from 52 locations around the globe to infer the implications of the Armstrong et al. [2002] “ballast” model to the ratio of organic