Sentences with phrase «overcast days decreased»
Their statistical analysis noted a clear trend: overcast days decreased.78 percent each decade while cloud - free days increased.6 percent for the same period.
https://www.pnnl.gov/ Not exact matches
But in the most comprehensive study to date of overcast versus cloud - free days in China, a team led by the Department of Energy's Pacific Northwest National Laboratory, reporting in the current advance online issue of Geophysical Research Letters, has found that cloud cover has been decreasing for the past 50 years.