Here is a riddle—a serious one, not a joke:
As the ocean warms up, more water evaporates into the air. So does more water vapor then mean more warming? And does more warming mean more water vapor? And ‘round and ‘round we go?
Or, since more water vapor means more clouds, will the fluffy white clouds reflect enough sunlight back into space to make up for the warming?
This cloud riddle has scientists scratching their heads and trying to figure it out. NASA is helping with satellites like Aqua and CloudSat, which study the Earth's water cycle and clouds in 3-D.