Variability of the 13 C of dissolved inorganic carbon at a site in the north Pacific Ocean

Details Variability of the 13 C of dissolved inorganic carbon at a site in the north Pacific Ocean Variability of the 13 C of dissolved inorganic carbon at a site in the north Pacific Ocean

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992gecoa..56.3589m&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 56, Issue 9, pp.3589-3592

Physics

1

Scientific paper

We present a depth profile of 13 C - DIC (dissolved inorganic carbon) and a time-series of surface water 13 C - DIC from seawater samples collected at a single site during the Eve cruise in the North Pacific in June of 1987. Our deep water results confirm those reported by (1985) for GEOSECS Station 213 (10° west of Eve site). We observed a small but significant decrease in the 13 C of DIC in the upper 500 m of the water column over 13 years since the GEOSECS survey. This is likely due, at least in part, to the input of additional fossil fuel-derived CO 2 to the upper ocean. We observed a significant change in surface water 13 C over a short time period (2 days) that was the result of a change in the shallow surface water mass. This change emphasizes the need for caution when conducting seasonal studies.

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