请问这句英语应怎样理解?
cascading upward through a chain of turbulent features,
接踵而来的是一系列湍流的徵状,
应怎样理解cascading upward through
原全句是（Errors and uncertainties multiply, cacading upward through a chain of turbulent features.）
cascading 的逻辑主语是哪个，cascading upward through 又该怎样理解？