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Revisiting carbon flux through the ocean's twilight zone
Buesseler, K.O.; Lamborg, C.H.; Boyd, P.W.; Lam, P.J.; Trull, T.W.; Bidigare, R.R.; Bishop, J.K.B.; Casciotti, K.L.; Dehairs, F.A.; Elskens, M.; Honda, M.; Karl, D.M.; Siegel, D.A.; Silver, M.W.; Steinberg, D.K.; Valdes, J.; Van Mooy, B.A.S.; Wilson, S. (2007). Revisiting carbon flux through the ocean's twilight zone. Science (Wash.) 316(5824): 567-570. dx.doi.org/10.1126/science.1137959
In: Science (Washington). American Association for the Advancement of Science: New York, N.Y. ISSN 0036-8075; e-ISSN 1095-9203, meer
Peer reviewed article  
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Auteurs  Top 
  • Buesseler, K.O.
  • Lamborg, C.H.
  • Boyd, P.W.
  • Lam, P.J.
  • Trull, T.W.
  • Bidigare, R.R.
  • Bishop, J.K.B.
  • Casciotti, K.L.
  • Dehairs, F.A., meer
  • Elskens, M., meer
  • Honda, M.
  • Karl, D.M.
  • Siegel, D.A.
  • Silver, M.W.
  • Steinberg, D.K.
  • Valdes, J.
  • Van Mooy, B.A.S.
  • Wilson, S.
Abstract
    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 contrasting sites. This large variability in transfer efficiency is poorly represented in biogeochemical models. If applied globally, this is equivalent to a difference in carbon sequestration of more than 3 petagrams of carbon per year.
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