ConcepTest: Ocean Element Profiles - 2
Which element could have a depth profile in the ocean that looks like this?
A. It probably has a source from the atmosphere
B. It is probably an essential nutrient for phytoplankton
C. It probably has a source from ocean sediments
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No data yet. The correct responses are A and C. The elevated surface concentrations are indicative of a surface source, probably the atmosphere (A), and although it is scavenged at mid-depths the elevated deep concentrations may indicate a sediment source (C). Phytoplankton utilization (B) would leave to surface depletion, not seen. This question assumes a clicker system that allows multiple simultaneous responses.
References and Notes:
Sarmiento, J.L. & N. Gruber (2006) Ocean Biogeochemical Dynamics. Princeton University Press, Princeton, NJ, 528 pp.