Distribution and ventilation of water masses in the Labrador Sea inferred from CFCs and carbon tetrachloride

Estimates of ventilation ages depend strongly on the saturation levels. We calculated ventilation ages using CFC-12 with a range of saturation levels and with the saturation level calibrated tracer ratio, CFC-12/CCl4. The best estimates of ventilation ages for the NEADW and DSOW, obtained using the CFC-12/CCl4 ratio, were 11-13 and 5-8 years, respectively.