We
used recent ocean bomb radiocarbon inventory estimates for the time of GEOSECS
(mid-1970s) and WOCE (mid-1990s) from Peacock
[2004] and Key et al. [2004],
corrected for missing ocean areas [Naegler
2005], to develop a new parameterisation of the piston velocity – wind speed
relationship of CO2 air-sea gas exchange. For monthly mean
climatological winds on a 1°x1° grid, this results in a gas exchange parameter
aq,660 of 0.32±0.04 (in cm hr-1 m-2 s2)
and a net oceanic CO2 uptake of 1.53±0.18 PgC/yr for the mid-1990s,
when using the Takahashi et al.
[2002] pCO2 data.
Author: T. Naegler, K. Rodgers, P. Ciais and I. Levin (tobias dot naegler at iup dot uni-heidelberg dot de)
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