Bottle and nutrient data for Eqpac Cruise TT012 was combined by 
James R. Postel of the University of Washington, Seattle.  
The sigma values for casts 15 and 19 were estimated.

The sigma values reported for the shallowest 5 depths of casts 20 and 24 were estimated.

The 200m depth sigma values for cast 28 were estimated.