Figure 4
From: Testing algal-based pCO2 proxies at a modern CO2 seep (Vulcano, Italy)
Ɛp, CO2[aq], and reconstructed pCO2 from phytol in surface sediments. (A) Ɛp of phytol, (B) CO2[aq] based on Ɛp of phytol, and (C) pCO2 based on the δ13C of phytol from surface sediments collected in May (light colors) and October (dark colors), ranging from Site 1 (S) to Site 16 (control). Stars indicated CO2 concentrations43. Open orange diamonds mark regions where there was minor additional bubbling of gas.
