At least, that’s my interpretation of things.
At about minute 50 there is a summary slide shown. It says:
substantial evidence for solar-climate variability in the pre-industrial age, but no established mechanism
Solar contributions to 20th century climate change are poorly understood:
– Climate models may have the wrong sign for solar irradiance forcing
– Possibly unaccounted solar-indirect contribution
Cloud is measuring the influence of cosmic rays on aerosols and clouds. Main findings (submitted) include first measurement of:
– Ion-induced vs neutral nucleation
– Molecular composition of the critical clusters
– Binary nucleation of H2SO4 – H2O at mid-tropospheric temperatures
– Ternary nucleation mechanism of NH3 – H2SO4 – H2O at boundary layer temperatures
Quantifying the microphysical processes that control a) clouds and b) how the climate is influenced by solar variability are central to reducing the uncertainties of anthropogenic climate change.
So a bit “weasel wordy” on saying “The Sun Did It” but at least willing to say “If you don’t know clouds and you don’t know the solar contribution, you don’t know jack…” coupled with “we’ve made cloud nucleations in the lab with cosmic rays, so it matters.”
That’s my interpretation at any rate.
With h/t to comments at WUWT open thread here:
About 26 in there is a comment about spectral radiance changes and that the models may have a “wrong sign” on solar forcing variation.
Basically, “The UV matters”. Perhaps quite a lot.
At 28 minutes we find that all those Diesel Ships At Sea add aerosols that cause more clouds and brighter clouds. Gee, Diesel is a cooling effect…
At 31 minutes we find that the “models” don’t get clouds right either.
About 35 minutes we find out that aerosols matter a lot, and that precipitation removes them from the air. Basically, the rains matter. But at 36 minutes we find out we don’t really know how “gas to particle” conversions work and how sulphur and ammonia do what they do.
There are some very nice pictures of the device in the 40 minute ranges.
Q&A starts at 52 minutes.
At 53 minutes is the interesting statement that meteoric dust is the main source of very high altitude particles.
A questioner asks about the changes in clouds at 1:01 or so that finds a 2 W/m^2 and huge effects from changes in cloud cover. In other words, CO2 is dinky in comparison.
IMHO, well worth watching. It is real and honest science as it ought to be done.