Plate 11.5 (a) Temperature during iron-enrichment experiment at a site in the oceanic,
eastern tropical Pacific contoured in color on a depth vs. time plot. (b) Contour plots
on successive days after iron addition. Rows of plots are sulfur hexafluoride (SF6)
tracer, iron concentration, chlorophyll concentration, nitrate (contoured as difference
from 10 μM), and fugacity (% partial pressure) of CO 2.
(^) (After Coale et al. 1996.)
Plate 11.6 Circulation, nitrate concentrations, and biological parameters in the field of
an anticyclonic vortex of a tropical instability wave in the Equatorial Atlantic. (a)
Temperature and velocities averaged to the pycnocline depth. (b) Nitrate (μM)