Turbulent nitrate fluxes in the Amundsen Gulf during ice-covered conditions

Details Turbulent nitrate fluxes in the Amundsen Gulf during ice-covered conditions Turbulent nitrate fluxes in the Amundsen Gulf during ice-covered conditions

Aug 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011georl..3815602b&link_type=abstract

Geophysical Research Letters, Volume 38, Issue 15, CiteID L15602

Mathematics

Logic

1

Oceanography: General: Arctic And Antarctic Oceanography (9310, 9315), Oceanography: General: Marginal And Semi-Enclosed Seas, Oceanography: General: Physical And Biogeochemical Interactions, Oceanography: Physical: Upper Ocean And Mixed Layer Processes, Oceanography: Biological And Chemical: Nutrients And Nutrient Cycling (0470, 1050)

Scientific paper

Turbulence and nitrate measurements collected in the Amundsen Gulf during ice-covered conditions in fall 2007 are combined to provide mean vertical profiles of eddy diffusivity $\overline{K and diffusive nitrate fluxes $\overline{F. The mean diffusivity (with 95% confidence intervals) was maximum near the uppermost sampling depth (10 m) with $\overline{Kmax = 3(2, 5) × 10-3 m2 s-1 and decreased exponentially to a depth of ˜50 m, below which it was roughly constant at the background value $\overline{Kb = 3(2, 5) × 10-6 m2 s-1. The nitracline, centered around 62 m depth, was subject to an eddy diffusivity close to the background value $\overline{Kb and the mean diffusive nitrate flux across the nitracline was $\overline{Fnit = 0.5(0.3, 0.8) mmol m-2 d-1. These observations are compared with other regions and the role of vertical mixing on primary production in the Amundsen Gulf is discussed.

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