The upperclouds can circle the planet in four days or even less, and no one knows why.
高空云能在四天或更少时间里环绕卫星一周,没人知道为什么。
2
Precipitation from warm front rainbands often involves "seeding" by ice particles falling from the upperclouds layers.
暖锋雨带的降水经常随着来自上层云层“散布”的冰粒。
3
The TC4 project will generate new data on the icy cirrus clouds that are formed in the upper atmosphere by heat-driven, or convective, storm systems that coalesce over warm waters in the tropics.