Tuning CMIP6 extension

[Bryan Lawrence]

From the sea ice folks:

In particular we’d like to ask for information on how did model groups go about tuning the sea ice (in 1850 control? transient 20th century? transient 21st century? Which “knobs” were used for the sea ice tuning? What was the target state (certain mean thickness, concentration, end of 20th century trends, etc?).

[Bryan Lawrence]

Also the paper we got via Balaji.