Low efficiency of nutrient translocation for enhancing oceanic uptake of carbon dioxide.

Yool, A., Shepherd, J.G., Bryden, H.L. and Oschlies, Andreas (2009) Low efficiency of nutrient translocation for enhancing oceanic uptake of carbon dioxide. Open Access Journal of Geophysical Research: Oceans, 114 . C08009. DOI 10.1029/2008JC004792.

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Anthropogenic emissions of carbon dioxide (CO2) are steadily increasing the concentration of this greenhouse gas in the Earth's atmosphere. The possible long-term consequences of this elevated concentration have led to proposals for a number of large-scale geoengineering schemes that aim to enhance or augment natural sinks for CO2. One such scheme proposes deploying a large number of floating "pipes'' in the ocean that act to translocate nutrient-rich seawater from below the mixed layer to the ocean's surface: the nutrient supplied should enhance the growth of phytoplankton and consequently the export of organic carbon to the deep ocean via the biological pump. Here we examine the practical consequences of this scheme in a global ocean general circulation model that includes a nitrogen-based ecosystem and the biogeochemical cycle of carbon. While primary production is generally enhanced by the modeled pipes, as expected, the effect on the uptake of CO2 from the atmosphere is much smaller, may be negative, and shows considerable spatiotemporal variability.

Document Type: Article
Keywords: Biogeochemistry; perpetual salt fountainiron fertilization atmospheric co2 model sea phytoplankton circulation framework silicate dynamics
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-BM Biogeochemical Modeling
OceanRep > The Future Ocean - Cluster of Excellence
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1029/2008JC004792
ISSN: 2169-9275
Projects: Future Ocean
Date Deposited: 24 Aug 2009 12:42
Last Modified: 25 Apr 2018 08:17
URI: http://oceanrep.geomar.de/id/eprint/2480

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