Summers in Shetland are usually showery, bright and cool, winters dark and wild, but also mild. The climate's slightly warmer than the Gulf of Alaska, which lies on the same 60th parallel of latitude. On the fine days, which can occur at any time of year, the islands appear idyllic; in winter hurricanes they're awe-inspiring. But, having said that, when the weather's good you can have a beach all to yourself.
Deposition is the process that follows erosion. Erosion is the removal of particles (rock, sediment etc.) from a landscape, usually due to rain or wind. Deposition begins when erosion stops; the moving particles fall out of the water or wind and settle on a new surface. This is deposition.
Coastal deposition is the laying down of material on the coast by the sea. It occurs when waves lose energy or when large inputs of sediment are made into the coastal system - perhaps due to the arrival of fluvial sediment at a river estuary. Wave refraction in bays also encourages deposition due to the dispersal of wave energy.