subtropical Pacific at 30°N, 152°W. Salinity variation is minimized by plotting on the
nitrogen scale; it varied from 35.26 at the surface to a minimum of 34.00 at ∼540 m.
The salinity “inversion” is stabilized by the vertical temperature gradient. CLIVAR
program profile data from NODC.
Fig. 11.23 Vertical profiles of (a) chlorophyll and (b) primary productivity from
Station ALOHA (22.75°N, 158°W, the Hawaii Ocean Time Series site). Open circles
for samples up through January 1991; filled circles for those afterward.
(After Letelier et al. 1996.)