Beaufort Sea, Arctic Ocean - Biogeosciences

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May 2, 2013 - Mead simplex minimization procedure between particle size determined ...... Alldredge, A. L., Cowles, T. J., MacIntyre, S., Rines, J. E. B., Don-.


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Climate of the Past

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Biogeosciences, 10, 2833–2866, 2013 doi:10.5194/bg-10-2833-2013 © Author(s) 2013. CC Attribution 3.0 License.


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Ecosystem function and particle flux dynamics across the Mackenzie Shelf (Beaufort Sea, Arctic Ocean): an integrativeEarth analysis of spatial System Dynamics variability and biophysical forcings Open Access

A. Forest1 , M. Babin1 , L. Stemmann2 , M. Picheral2 , M. Sampei3 , L. Fortier1 , Y. Gratton4 , S. B´elanger5 , E. Devred1 , J. Sahlin1 , D. Doxaran2 , F. Joux6,7 , E. Ortega-Retuerta6,7,8 , J. Mart´ın8,10 , W. H. Jeffrey9Geoscientific , B. Gasser10 , and 10 J. Carlos Miquel Instrumentation

Joint International Laboratory, UMI 3376, Universit´e Laval (Canada) – CNRS (France), D´epartement Methods and de Biologie and Qu´ebec-Oc´ean, Universit´e Laval, Qu´ebec G1V 0A6, Canada Data Systems 2 UPMC Universit´ e Paris 06, UMR 7093, Laboratoire d’Oc´eanographie de Villefranche 06230, Villefranche-sur-Mer, France 3 Graduate School of Biosphere Science, Hiroshima University, Higashi Hiroshima 739-8511, Japan 4 Institut National de la Recherche Scientifique – Eau Terre Environnement, Qu´ ebec G1K 9A9, Canada 5 D´ epartement de Biologie, Chimie et G´eographie, Universit´e du Qu´ebec a` Rimouski, Rimouski, Qu´ebec G5L 3A1, Canada Geoscientific 6 UPMC Universit´ e Paris 06, UMR 7621, Laboratoire d’Oc´eanographie Biologique de Banyuls, Observatoire Oc´eanologique, Model Development 66650 Banyuls-sur-Mer, France 7 CNRS, UMR 7621, Laboratoire d’Oc´ eanographie Microbienne, Observatoire Oc´eanologique, 66650 Banyuls-sur-Mer, France 8 Instituto de Ciencias del Mar (CSIC). Paseo Mar´ıtimo de la Barceloneta, 37-49, 08003 Barcelona, Spain Hydrology and 9 Center for Environmental Diagnostics and Bioremediation, University of West Florida, Pensacola FL-32514, USA Earth System 10 IAEA Environment Laboratories, MC98000, Monaco, Monaco 1 Takuvik

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like substances, and ballast minerals. Modeled settling velocity of small and large aggregates was, respectively, higher and lower than in previous studies within which a high fractal dimension (i.e., more compact particles) was consequential Solid m). Earth of deep-trap collection (∼ 400–1300 Redundancy analyses and forward selection of abiotic/biotic parameters, linear trends, and spatial structures (i.e., principal coordinates of neighbor matrices, PCNM) were conducted to partition the variation of the 17 POC flux size classes. Flux variability was explained at 69.5 % by the addition of a temporal trend, 7 sigCryosphere nificant PCNM, and 9The biophysical variables. The first PCNM canonical axis (44.5 % of spatial variance) reflected the total magnitude of POC fluxes through a shelf-basin gradient controlled by bottom depth and sea ice concentration (p