Atmospheric intertropical convergence impacts surface ocean carbon and nitrogen biogeochemistry in the western tropical Pacific

Details Atmospheric intertropical convergence impacts surface ocean carbon and nitrogen biogeochemistry in the western tropical Pacific Atmospheric intertropical convergence impacts surface ocean carbon and nitrogen biogeochemistry in the western tropical Pacific

Apr 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000georl..27.1013h&link_type=abstract

Geophysical Research Letters, Volume 27, Issue 7, p. 1013-1016

Mathematics

Logic

5

Oceanography: Physical: Air/Sea Interactions, Oceanography: Biological And Chemical: Biogeochemical Cycles, Oceanography: Biological And Chemical: Ecosystems, Structure And Dynamics, Oceanography: Biological And Chemical: Nutrients And Nutrient Cycling

Scientific paper

Concentrations of inorganic and organic carbon and organic nitrogen, as well as other hydrographic and biogeochemical variables, were measured in the oligotrophic waters of the western South Pacific Ocean (5-35°S 170°W). With those data, we assess the impact of the intertropical convergence of the wester tropical Pacific Ocean on surface ocean biogeochemistry. Low salinity, oligotrophic waters of the western tropical Pacific underlying regions of high net precipitation are characterized by concentrations of organic carbon and nitrogen that are elevated relative to higher salinity (lower net precipitation) zones. We hypothesize that water column stratification, forced by high net precipitation, favors enhanced rates of N2 fixation, with resultant elevation of organic carbon and nitrogen concentrations in the region. An effect of anthropogenic ocean warming and the associated increased hydrologic cycle in the tropical Pacific may be to alter the biogeochemical cycling of carbon and nitrogen through enhancement of N2 fixation.

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