The solubility of gasses in water decreases with rising temperature. For ocean absorption of O2 from the atmosphere, the surface temperature is particularly imp

The solubility of gasses in water decreases with rising temperature. For ocean absorption of O2 from the atmosphere, the surface temperature is particularly important. This is why even if atmospheric O2 does not decrease, this could still be a concern -- albeit one with a different threshold than a scenario where the ocean warms and atmospheric O2 concentrations decrease at the same time. Still, I certainly do hope that you're correct! And thank you for the thoughtful and well-considered reply!