Clouds are made up of water and ice. The more water in the cloud influences the amount of solar radiation reflected into the atmosphere.  As the earth warms the ratio of ice to water increases in favor of water.  Since there is more water this should result in more reflection and hence cooling.  However with less ice there is less capacity for water to replace ice, causing more warming.  This means that warming could occur faster than previously predicted by scientists.  A recent study has suggested this could be the difference of 1.3 degrees C.

This would render the goals set by the Paris climate almost useless as their goal was to stop warming above 1.5 degree C.  At the same time the 1.3 degree C rise is only one study so it the actual value is still unknown it could be more or less.  Overall the trend shows warming caused by unpredicted water in clouds ratio. Scientist at Yale who preformed the study stressed that study needs to trigger action not despair or a feeling of hopelessness in combating climate change.

I think that following this discovery makes sticking to the Paris conference even more important.  It also highlights the need for even more action to counter climate change.