Paragraph explaining the influence that katabatic winds has on location of settlement and farms activities?

Since the katabatic winds are descending, they tend to have a low relative humidity, which desiccates the region. Other regions may have a similar but lesser effect, leading to "blue ice" areas where the snow is removed and the surface ice sublimates, but is replenished by glacier flow from upstream.

i think the reason that they immagrated was to find freedom of religion