The feedback we had was:
| More trees + shrubs & less grass in high latitudes (compared with GC3.1) |
| ⇓ |
| In winter, trees are above the snow |
| ⇓ |
| In winter, increased albedo |
| ⇓ |
| In winter, anamalous warning in this region |
| ⇓ |
| AMOC drops from about 15 Sv to 12 Sv |
There is a parameter which sets the amount of snow on a leaf. In GC3.1 this is very low, but we've considerably increased this for UKESM0.91
We now expect to be running PI control in mid-December.
