478
D. H. CUSHING:
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Fig.3b
Fig. 3. Secondary stock in the Indian Ocean (IOBC 1968 a, b) in gC m- 2 • a) in the SW monsoon;
b) in the NE monsoon
is much more variable) and the Indian Ocean net, were taken from IOBC (1968 a, b)j
the night samples from the top 200 m of the ocean were used to obtain average stock
estimates in 5° squares by the two monsoon periods. Quantities in ml m- 2 were converted
to gC m- 2 with the factor 0.065 (CUSHING, 1971a) (Figs. 3a, b). From the World Atlas
of Sea Surface Temperatures (U.S. Navy Hydrographic Office, 1944), monthly averages