A water mass rising to the surface of the northern Indian Ocean by upwelling has a salinity of 36 , a temperature of 1 oC, and an O2 concentration of 3.8 mL L-1 . 1. Is this mass at saturation, oversaturated or undersaturated with respect to O2?

(a) (0.2 pts) Calculate the NAEC of O2 at this salinity and temperature using the appropriate table (see units!) from the supporting data package you have been using so far (available as a pdf on moodle).

(b) (0.2 pts) Calculate the percent saturation of this water mass. Is it over-/under-/saturated?

(c) (0.2 pts) Calculate the AOU of this water mass.

(d) (0.1 pts) Explain briefly why this water mass is over-/under-/saturated with respected to O2.