Fig. 3: Variation of γCO2 with pH, pCO2, DIC, Ωarag, SST and SSS.
From: A new indicator can assess absorption capacity for carbon dioxide and ocean acidification
a–d The simulation conditions are temperature = 18.3 °C and salinity = 34.8. The legend of (a–d) is uniformly placed in (d). e–h The simulation conditions are at Alk = 2250 μmol·kg−1. a, b The figure represents the process of ocean Alk enhancement. Point A is the starting point of Alk addition, and point C is the endpoint. Segment AB is the process of adding seawater Alk, while segment BC is the process of seawater CO2 absorption. a At the same pH, an increased Alk has minimal impact on γCO2. b At the same pCO2, increased Alk leads to a marked increase in γCO2. c γCO2 reaches its minimum value when DIC slightly exceeds Alk. d Under different Alk, γCO2 is generally less than 3 when Ωarag < 1.0. e, f Variation of γCO2 with temperature and salinity. γCO2 is strongly influenced by temperature and salinity, decreasing as temperature and salinity decline. g, h Variation of γCO2 with Ωarag at different temperatures and salinity. At different temperatures and salinity, γCO2 is generally less than 3.0 when Ωarag < 1.0.
