High particle export over the continental shelf of the west Antarctic Peninsula
Buesseler, Ken O.
McDonnell, Andrew M. P.
Schofield, Oscar M. E.
Steinberg, Deborah K.
Ducklow, Hugh W.
MetadataShow full item record
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.
Author Posting. © American Geophysical Union, 2010. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 37 (2010): L22606, doi:10.1029/2010GL045448.
Showing items related by title, author, creator and subject.
Durkin, Colleen A.; Estapa, Margaret L.; Buesseler, Ken O. (Elsevier, 2015-02-27)Carbon and nutrients are transported out of the surface ocean and sequestered at depth by sinking particles. Sinking particle sizes span many orders of magnitude and the relative influence of small particles on carbon ...
Buesseler, Ken O.; Andrews, J. E.; Pike, Steven M.; Charette, Matthew A.; Goldson, Laura E.; Brzezinski, Mark A.; Lance, V. P. (2004-07-26)We studied the effect of iron addition on particle export in the Southern Ocean by measuring changes in the distribution of thorium-234 during a 4 week Fe enrichment experiment conducted in the high-silicate high-nitrate ...
Th-234 deficit and excess in the Southern Ocean during spring 2001 : particle export and remineralization Savoye, Nicolas; Buesseler, Ken O.; Cardinal, Damien; Dehairs, Frank (American Geophysical Union, 2004-06-16)234Th deficit and excess were examined in the upper 500 m of the Southern Ocean from Sub-Antarctic to Seasonal Ice Zones (Australian sector) during austral spring 2001. 234Th fluxes at 100 m indicate that particle export ...