Well, it is a different sort of iris effect from that which was originally proposed: the pupil becomes more dilated with increased infrared rather than more constricted. (realclimate.org)
So looking at one - year windows in the data and suppressing seasonality eliminates from 16 % to 39 % of the putative iris effect, depending on which window you look at. (realclimate.org)
The phenomenon of carbon fertilization and the huge tonnages of CO2 that plants are removing from the system, the theorized iris effect, the impact of unknowable undersea volanic activity, the persistent regrowth of corals in areas devastated by bleaching events... all of this evidence points to a catastrophic failure of the politics of science to stay grounded in facts. (insidesources.com)