Apparently Warren Meyer is unaware that we can measure anthropogenic CO[sub]2[/sub] through its isotope ratio and because of this, we can determine that fossil CO[sub]2[/sub] is entering the oceans at an increased rate rather than leaving it. Measurement directly contradicts his statement.
Measurements of the ocean-wide ∂[sup]13[/sup]C distribution during the 1990s significantly improved the determination of the ocean ∂[sup]13[/sup]C changes that have occurred due to the uptake of anthropogenically produced CO[sub]2[/sub]. These new data indicate that the global mean rate of ∂[sup]13[/sup]C inventory change was -65 ± 33 ‰ m per decade between the 1970s and 1990s. Between 1970 and 1990, the ocean-wide surface ∂[sup]13[/sup]C decrease rate of -0.16 ± 0.02 ‰ per decade represents about 70% of the measured atmospheric ∂[sup]13[/sup]C decrease over the same period [Francey et al., 1999].
Citation: Quay et al. 2003. Changes in the [sup]13[/sup]C/ [sup]12[/sup]C of dissolved organic carbon in the ocean as a tracer of anthropogenic CO[sub]2[/sub] uptake. Global Biogeochemical Cycles Vol. 17, No. 1.
(N.B. ∂[sup]13[/sup]C is negative in these measurements because fossil fuels have more [sup]12[/sup]C than [sup]13[/sup]C.)
The most likely explanation for the increase of deep (> 200 m depth) suspended POC [Particulate Organic Carbon] ∂[sup]13[/sup]C values over the decade of this study (Fig. 1) is the input of excess CO[sub]2[/sub] from the fossil fuel and biomass burning to the oceans. Although we cannot eliminate the possibility of seasonal influences as a contributing cause of the isotopic changes, they are minimized because: 1) all of our sampling was done during the same time of year (June) and 2) sea surface temperature changes, which have been shown to correlate with changes in export production [Laws et al., 2000], were minimal (±2°C) at our sites during the occupations. The ∂[sup]13[/sup]C signature of the anthropogenic CO[sub]2[/sub] is ~20 ‰ lower than pre-anthropogenic atmosphere CO[sub]2[/sub], and has caused atmospheric CO[sub]2[/sub] ∂[sup]13[/sup]C values to decrease by 1.1 ‰ over the past four decades [Keeling et al., 1979; Ciais et al., 1995].
Citation: Druffel et al. 2003. Penetration of anthropogenic carbon into organic particles of the deep ocean. Geophysical Research Letters 30:1414.