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AGU: Global Biogeochemical Cycles

 

Index Terms

  • Oceanography: General: Climate and interannual variability
  • Oceanography: Physical: Air/sea interactions
  • Oceanography: Biological and Chemical: Biogeochemical cycles
  • Oceanography: Biological and Chemical: Nutrients and nutrient cycling

Abstract

GLOBAL BIOGEOCHEMICAL CYCLES, VOL. 17, 1033, 11 PP., 2003
doi:10.1029/2000GB001317

Variability in oxygen and nutrients in South Pacific Antarctic Intermediate Water

J. L. Russell

Department of Atmospheric Sciences, University of Washington, Seattle, Washington, USA

A. G. Dickson

Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California, USA

Calculation of the initial oxygen based on both phosphate and nitrate data collected along three WOCE transects indicates that the common assumption that new Antarctic Intermediate Water (AAIW) is initially saturated with respect to oxygen is incorrect. The initial oxygen concentration of AAIW is shown to be undersaturated, and the degree of undersaturation varies from year to year. Chlorofluorocarbon data is used to determined the age of AAIW at various latitudes and a frequency analysis of the variability in the initial oxygen concentrations is presented. Possible implications of this variability to the global carbon cycle are suggested.

Published 4 April 2003.

Citation: Russell, J. L., and A. G. Dickson (2003), Variability in oxygen and nutrients in South Pacific Antarctic Intermediate Water, Global Biogeochem. Cycles, 17(2), 1033, doi:10.1029/2000GB001317.

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