Mathematics – Logic
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30xoce9f&link_type=abstract
Geophysical Research Letters, Volume 30, Issue 24, pp. OCE 9-1, CiteID 2289, DOI 10.1029/2003GL018049
Mathematics
Logic
6
Oceanography: Physical: Air/Sea Interactions (0312), Meteorology And Atmospheric Dynamics: Ocean/Atmosphere Interactions (0312, 4504), Oceanography: Biological And Chemical: Modeling
Scientific paper
We have developed a ~45 year carbon isotope record (δ13C, Δ14C) from the coralline sponge Acanthochaetetes wellsi from Vanuatu in an effort to examine air-sea CO2 exchange using both the δ13C Suess effect and the bomb-14C transient. From 1953 to 1999 δ13C decreased by 0.9‰. Pre-bomb Δ14C is -59‰, consistent with coral based estimates from the same region and the post-bomb maximum (+121‰) is achieved in 1973. A 1-D box-diffusion model was employed to quantify vertical diffusivity and air-sea exchange rates. The model suggests that a low vertical diffusion rate (0.1 cm2 s-1) coupled with a moderate CO2 exchange rate produces the overall observed shape of the pre-post bomb Δ14C record and the general large scale features of the δ13C time series. These parameters are on the low end of values used in ocean-carbon GCMs but are consistent with microscale tracer experiments.
Caldeira Ken
Fallon Stewart J.
Guilderson Thomas P.
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