Errors and uncertainties mutiply, cascading upward through a chain of turbulent features. From dust devils and squalls up to continent-size eddies that only satellites can see.

• 错误和不可靠上升,接踵而来的是一系列湍流的徽状,从小尘暴和暴风到只有卫星上可以看到的席卷整个大陆的漩涡。