Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Sensitivity of the phosphate‐cadmium‐carbon isotope relation in the ocean to cadmium removal by suboxic sediments

Sensitivity of the phosphate‐cadmium‐carbon isotope relation in the ocean to cadmium removal by... Reconstructions of past deep ocean nutrient concentrations rely largely on the carbon isotopic composition and cadmium content of shells of benthic foraminifera. When comparing records of these two paleonutrient tracers, a relation similar to the phosphate‐cadmium‐carbon isotope relation in the water column today is generally assumed. We present new water column, sediment, and pore water data from the California continental margin which demonstrate that Cd accumulation is enhanced in suboxic sediments. These results suggest that the oceanic Cd inventory is sensitive to changes in the areal extent and redox intensity of suboxic sediments and thus that the phosphate‐cadmium relation in the ocean could have been different in the past. The magnitude of this effect and its evolution through time is presently hard to quantify because the oceanic Cd budget is poorly constrained. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Paleoceanography and Paleoclimatology Wiley

Sensitivity of the phosphate‐cadmium‐carbon isotope relation in the ocean to cadmium removal by suboxic sediments

Loading next page...
 
/lp/wiley/sensitivity-of-the-phosphate-cadmium-carbon-isotope-relation-in-the-G0M0Q8IP42

References (101)

Publisher
Wiley
Copyright
Copyright © 1995 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0883-8305
eISSN
2572-4525
DOI
10.1029/94PA03352
Publisher site
See Article on Publisher Site

Abstract

Reconstructions of past deep ocean nutrient concentrations rely largely on the carbon isotopic composition and cadmium content of shells of benthic foraminifera. When comparing records of these two paleonutrient tracers, a relation similar to the phosphate‐cadmium‐carbon isotope relation in the water column today is generally assumed. We present new water column, sediment, and pore water data from the California continental margin which demonstrate that Cd accumulation is enhanced in suboxic sediments. These results suggest that the oceanic Cd inventory is sensitive to changes in the areal extent and redox intensity of suboxic sediments and thus that the phosphate‐cadmium relation in the ocean could have been different in the past. The magnitude of this effect and its evolution through time is presently hard to quantify because the oceanic Cd budget is poorly constrained.

Journal

Paleoceanography and PaleoclimatologyWiley

Published: Apr 1, 1995

There are no references for this article.