Sources of heat and carbon in the ocean exceed that on land and in the atmosphere by many orders of magnitude and the ocean is larger than the atmosphere by many orders of magnitude.

The atmosphere and ocean taken together weighs 1.36E18 tonnes of which the ocean is 99.62% and the atmosphere 0.38% That observed changes in ocean temperature and acidity can be explained in terms of atmospheric phenomena is a case of an extreme form of the atmosphere bias of climate science and of humans in general. We are land creatures and our experience is mostly atmospheric and moreover what we know about the ocean is somewhere close to zero.

LINK#1: https://tambonthongchai.com/2021/04/22/climate-science-101-4-22-2021/

LINK#2: https://tambonthongchai.com/2020/08/14/ocean-volcanism/

LINK: http://www.plateclimatology.com/how-atmospheric-bias-is-hurting-climate-science