I think the y-axis in panel (a) would be more appropriately labeled as stem diameter rather than "seasonal stem diameter growth." If it was growth, it should go back toward 0 late in the growing season. If it is diameter, then it would level off at a high value as growth slows down late in the growing season.
@rudeboybert , a comment from Alan Tepley:
I think the y-axis in panel (a) would be more appropriately labeled as stem diameter rather than "seasonal stem diameter growth." If it was growth, it should go back toward 0 late in the growing season. If it is diameter, then it would level off at a high value as growth slows down late in the growing season.
I agree. Could you please change that?