Quote from: K-Dog on Aug 09, 2023, 11:27 PMThe problem is CO2 concentration limits plant growth. More CO2 means more plant growth, because there is ample sunlight to support faster growth. CO2 is the normal limit. Water is also needed for verdant plant growth. Higher temps could dry plants out.
Higher summer temps could also raise plant metabolism causing plants to respire and release CO2 trapped earlier in the day.
I think an even larger factor is the increasing Ocean Surface Temperature. Ocean covers 75% of the earth surface, and phytoplankton contribute more oxygen to the atmosphere than land plants do. I do not know however how warmer temps affect the oxygen production of phytoplankton. On the one hand, it might increase their metabolic rate producing more; on the other if the temp is too hot it might be killing them off, thus reducing production.
RE