North Pacific gyre

Fig. 1. Major oceanographic features 1. Canary Current, 2. Gulf Stream, 3. North Atlantic Current, 4. Sargasso Sea, 5. North Atlantic Gyre, 6. Labrador Current, 7. Loop Current, 8. North Pacific Gyre, 9. South Equatorial Current, 10. Benguela Current, 11. Humboldt Current, 12. Antilles Current, 13. Florida Current, 14. Brazil Current, 15. Kuroshio, 16. Antarctic West Wind Drift.

Smith, S. V., Kimmerer, W. J., and Walsh, T. W. (1986). Vertical flux and biogeochemical turnover regulate nutrient limitation of net organic production in the North Pacific Gyre. Limnol. Oceanogr. 31, 161-167. 

Clastic detrital North Pacific Gyre Gulf of Mexico... 

Scharek, R., Latasa, M., Karl, D. M., and Bidigare, R. R. (1999a). Temporal variations in diatom abundance and downward vertical flux in the oligotrophic North Pacific gyre. Deep Sea Res. I. 46 (6), 1051-1075. 

Sahlsten, E. (1987). Nitrogenous nutrition in the euphoric zone of the Central North Pacific Gyre. Mar. Biol. 96, 433-439. 

VtUareal, T., Woods, S., Moore, J., and Culver-Rymsza, K. (1996). Vertical migration oiRhizosolenia mats and their significance to NOs fluxes in the central North Pacific gyre.J. Plankton Res. 18(7), 1103-1121. 

Eppley et at. (1977) measured in situ rates of assimilation of NH4 , urea and N03 in the upper photic zone on several expeditions to the central North Pacific gyre near the Climax site using N tracer techniques. Their experiments were based on 24-h incubations and did not account for isotope dilution (substrate recycling during the incubation period). Assimilation of NOa in surface waters was negligible due to low ambient NOs concentrations, but potential uptake rates under conditions of NOs saturation were in the range of 1—8 nM d h... 

Letelier, R. M. (1994). Studies on the Ecology of Trichodesmium spp. (Cyanophyceae) in the Central North Pacific Gyre. Ph.D. thesis, University of Hawaii, Honolulu. 

Scharek, R., Tupas, L. M., et al. (1999b). Diatom fluxes to the deep sea in the ohgotrophic North Pacific Gyre at station ALOHA. Mar. Ecol. Prog. Ser. 182, 55—67. 

Table 9 Parameters affecting nutrient limitation comparison between North Atlantic and North Pacific gyres.

FIGURE 2.8 North Pacific gyre. Artwork courtesy of Ms. Vanessa Vaqueta of Chico, CA. 

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