Figure 4

Factorization of upwelling pH levels (High and Low). The threshold between present day and future pCO2 levels segregated on in situ pCO2 estimations (A), the equivalent pH levels representing high (>7.89) and low (<7.89) levels (B). Upwelling pH values were compared with values globally considered in laboratory studies (n = 40) assessing copepod sensitivity to OA conditions expected by the years 2100 and 2300 (C).