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Revisiting Carbon Flux Through the Ocean's Twilight Zone

Citation

Buesseler, KO and Lamborg, CH and Boyd, PW and Lam, PJ and Trull, T and Bridigare, RR and Bishop, JKB and Casciotti, KL and Dehairs, F and Elskens, M and Honda, M and Karl, DM and Siegel, DA and Silver, MW and Steinberg, DK and Valdes, J and Van Mooy, B and Wilson, S, Revisiting Carbon Flux Through the Ocean's Twilight Zone, Science, 316, (5824) pp. 567-570. ISSN 0036-8075 (2007) [Refereed Article]

DOI: doi:10.1126/science.1137959

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 paniculate 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.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Oceanography
Research Field:Chemical Oceanography
Objective Division:Environment
Objective Group:Physical and Chemical Conditions of Water
Objective Field:Physical and Chemical Conditions of Water in Marine Environments
Author:Trull, T (Professor Thomas Trull)
ID Code:47620
Year Published:2007
Web of Science® Times Cited:310
Deposited By:IASOS
Deposited On:2007-08-01
Last Modified:2009-09-17
Downloads:0

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