Comment by GlibMonkeyDeath

I simply don't understand this result - it takes ~4,000x as much energy to raise 1kg of water 1 degree compared to air. And how could this trend have started in 1850 (a clear trend from 1850-1900 is observed in the data in Figure 5b)? The sponges were collected at 30-100 m depth too, so this isn't just a surface effect.