Within a few ppm, yes. There will be variation over phytoplankton blooms (which draw down CO2 locally), the boreal forests in springtime, and also over very warm ocean waters, which will degas some CO2. But the measurements would have to be very accurate to detect the variation from the mean atmospheric CO2 concentration.
Appreciate it.
I'm just a dumb okie....so I couldn't say whether or not....global warming was man-made or not.
That being said....I doubt "we" can do much about it.
FRegards,