Is it a possibility that increases in CO2 concentration in sea water could shoal the thermocline through altering the chemical and physical (heat capacity?) conditions of sea water, and then influence the frequency and amplitude of El Nino-like events? Other way, I think there should be both a response and feedback way between the CO2 increases and El Nino-like events, through some mechanisms.

Yes, Prof. Towe, it is the traditional way CO2 leaves from sea water by increasing water temperature.

Thank you very much!