Footnote aa

^aaData from M. Rhein/R. Steinfeldt. See Kieke et al. 2006.

Kieke, D., M. Rhein, L. Stramma, W. M. Smethie, D. A. LeBel, and W. Zenk. 2006. Changes in the CFC inventories and formation rates of Upper Labrador Sea Water, 1997-2001. J. Phys. Oceanogr, 36:64-86.