Depth is one thing but what about the quality of the clouds
It is hard as said in such a short timeframe to conclude much, it would of been nice to see this data corilated with other data like solar radiation, air preasure and rainful as a global average as well as the usual subjects such as tempurature at ground/sea level.
Also were there any other sources to verify the data, satalites could drift slightly and calabrated measureing equipment starts to become less calabrated. So some other sources of data to verifiy is needed and in that the radar returns used to do rainfall would be another source of data to help verifiy the data and eliminate errors.
But air preasure plays a large part in this. Personaly last 10 years been the only time I recall seeing noctilucent clouds and there pretty high up type clouds, and pretty as well. So for me with regards to quality i'm fine with the variations we have.
But if there that worried then send up more satalites and create more space debri in orbit, could eventualy call it the disco cloud as there will be so many shiny bits of metal in orbit that snowglobes start bing used in geography.
All I can say is if your worried about global warming, chill out and wear a condom.