Craig (1957a), p. 2; for the large number («the surface
waters can
absorb only a small fraction of the extra CO2 in a period of several hundred years»), see Plass (1956), p. 149; the small number was from Dingle (1954), who used an 1899 measurement of
water mixed with ordinary salt, which behaves very
differently from the more chemically complicated sea
water.