Not exactly the answer to your question but some idea of the scale of the problem https://www.sciencenews.org/article/where-earth-stores-its-carbon https://www

Not exactly the answer to your question but some idea of the scale of the problem https://www.sciencenews.org/article/where-earth-stores-its-carbon https://www.sciencenews.org/article/where-earth-stores-its-c... TLDR, it's estimated the vast majority of carbon on Earth above the crust is in the ocean.