Note:  The temperature, salinity, and oxygen data are taken from casts
        reported by the HOTS program.  Samples with identical depths are
        replicate samples.

 methods:     O2/N2, O2/AR, 18O  -- mass spectrometer

 Reported in Emerson, Quay, et al., "O2, Ar, N2 and 222Rn in Surface
 Waters of the Subarctic Ocean:  Net Biological O2 Production", Global 
 Biogeochemical Cycles, vol 5, pp 49-69.