Cool. I live rent-free in Frank's little cult head. What a loser. He's even pout-stalking me now. I own that bitch, and rent him out for gangbangs.
And, Frank? Fuck off, you sad little troll.
And yes, I have told him before. 280 to 400 is, logarithmically, half a doubling. That eventually gives 1.5C warming, since climate sensitivity is about 3.0C per doubling. It's a trivial question, so he looks really stupid when he acts like it's some sort of gotcha.
Also, given that the isotope ratios prove the CO2 increase comes from burning fossil fuels, you have to be some special type of stupid to claim it doesn't. Frank and his fanbois here all are that type of stupid.
So, what are the images showing? That CO2 is absorbed during the growing season. But June isn't early enough. Not much has grown. In the northern hemisphere, the winter's accumulation of CO2 starts reversing in July, and reaches a minimum in September.