Numerical study of rainbands associated with extra-tropical cyclones using fine-mesh cloud resolving model

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The structure and formation mechanism of rainbands associated with extra-tropical cyclones were investigated through a series of numerical experiments using fine-mesh cloud resolving models. Idealized simulations of narrow cold frontal rainbands revealed that the development of core-gap structure of the rainbands due to horizontal shear instability depends strongly on the environmental and local vertical shear. Realistic numerical simulations revealed the formation mechanisms of other types of rainbands.