Some time ago I asked for an explanation from Spencer as to why some of the channels from amsu had been dropped (in particular CHLT which was rising at 1.2C/decade) but also why ch05 was changed to ch05 aqua and then modified to a new version of ch05 aqua. All this with no notes on the discover website.
No explanation was forthcoming.
The major changes have removed the rapidly rising trends. Why?
Note that all FEB 29ths have been removed!
Assuming The AMSU team have now stabilized on their plots ch04 is still showing an upward trend of almost 0.5C per decade