[E. Pluribus Unum]

The annual CO2 cycle at Mauna Loa is tracking yearly temperature changes indirectly as a secondary effect (plant growth and decay), not the capture/retention of CO2 in the ocean or another direct "geophysical" event.

I still consider the Manua Loa data to be fatally flawed without the corresponding sea surface temperatures.

It is a relevant variable that would reasonably have been collected at the same time, if they were going to all the trouble of recording the CO₂ and air temperature values.

Do you know if this data is available? I have not been able to find it.

[M. Dodge Thomas]

"I still consider the Manua Loa data to be fatally flawed without the corresponding sea surface temperatures... do you know if this data is available? I have not been able to find it."

Worldwide sea surface temperature data is available from NOAA.

The cause of the yearly CO2 cycle - which is also evident in data from non-oceanic monitoring sites (for example at the south pole) - is well studied and isn’t in dispute, even AFAIK by reputable skeptics of AGW. If you are reading otherwise check the cites (if any) for the source of alternate opinion.