28 
Significant differences also arise due to the way how the original data are averaged. We use 
averaging on isopycnal surfaces, whereas in the WOA01 climatology data are averaged on 
isobaric surfaces. 
Salhty 
Fig. 16: Examples of artificial water mass production due to isobaric averaging in 
the WOA01 climatology. Black lines outline artificial water masses due to 
isobaric averaging of the data in the WOA01 climatology.