Fig 2. PCA analysis of physical and geochemical data.

Salinity, inorganic phosphate, nitrate, ammonia, total nitrogen, silicate, temperature, salinity, sulfate, dissolved oxygen, and NPOC were used to construct the PCA plot. Color of symbols indicates the water mass from which that sample was taken (black corresponds to AW, blue corresponds to LIW, and orange corresponds to EMDW). Shape of symbols corresponds to the station from which they were taken. The percent explained by each of the depicted principle components are listed on the axis.