Fig. 3: Variation of the thermohaline and carbonate chemistry properties of the Southern Ocean water masses.
From: Southern Ocean freshening stalls deep ocean CO2 release in a changing climate
a, Temperature–salinity (TS) diagram for section A12 in the 1972–2013 climatology (diamonds) and the most recent section (December 2014, squares), colour-coded according to water mass fraction. The shaded areas define 100% WW and 100% uCDW (Methods, Extended Data Table 1 and Extended Data Fig. 1). b, DIC versus TA diagram for section A12 in the 1972–2013 climatology (diamonds) and December 2014 (squares), colour-coded according to water mass fraction. c, Averaged TS values for 90% uCDW, 90% WW and the intermediate water mass (between 90% WW and 90% uCDW), colour-coded according to mean oxygen levels. The vertical and horizontal bars indicate the s.d. of the observed values, representing the variability within each water mass type. Mean and s.d. values are listed in Extended Data Table 2. d, Averaged DIC versus TA values for 90% uCDW, 90% WW and the intermediate water mass, with background fCO2. The vertical and horizontal bars indicate the s.d. of the observed values. c,d, The sample sizes used to derive the statistics are n = 20 for the WW, n = 15 for the uCDW and n = 32 for the intermediate water mass.
