High particle export over the continental shelf of the west Antarctic Peninsula

Details High particle export over the continental shelf of the west Antarctic Peninsula High particle export over the continental shelf of the west Antarctic Peninsula

Nov 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010georl..3722606b&link_type=abstract

Geophysical Research Letters, Volume 37, Issue 22, CiteID L22606

Mathematics

Logic

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Oceanography: General: Arctic And Antarctic Oceanography (9310, 9315), Oceanography: Biological And Chemical: Sedimentation (1861), Oceanography: Biological And Chemical: Ecosystems, Structure, Dynamics, And Modeling (0439), Oceanography: Biological And Chemical: Radioactivity And Radioisotopes, Global Change: Biogeochemical Cycles, Processes, And Modeling (0412, 0414, 0793, 4805, 4912)

Scientific paper

Drifting cylindrical traps and the flux proxy 234Th indicate more than an order of magnitude higher sinking fluxes of particulate carbon and 234Th in January 2009 than measured by a time-series conical trap used regularly on the shelf of the west Antarctic Peninsula (WAP). The higher fluxes measured in this study have several implications for our understanding of the WAP ecosystem. Larger sinking fluxes result in a revised export efficiency of at least 10% (C flux/net primary production) and a requisite lower regeneration efficiency in surface waters. High fluxes also result in a large supply of sinking organic matter to support subsurface and benthic food webs on the continental shelf. These new findings call into question the magnitude of seasonal and interannual variability in particle flux and reaffirm the difficulty of using moored conical traps as a quantitative flux collector in shallow waters.

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