This would allow for one week of overcast and windless conditions. Winter is characterized by dry, almost windless weather with many clear and Sunny days. Nutrients are trapped at depth by the thermocline, making the windless surface clear but barren. Sheltered, windless areas created by windbreaks are called wind shadows. Hypoxia sometimes occurs due to warm windless periods in summer or ice in winter. Their song takes effect at midday, in a windless calm. The ships would then disperse on a clear, windless day when the sea was calm. Indoor kites are kites designed to fly in a windless environment. Even on windless days, swells that were generated in the Southern Ocean still arrive. In a windless environment or waterless house, a windcatcher functions as a solar chimney. Unlike the previous games, the weather was warm and windless. The Earth's static electric field may also provide lift in windless conditions. The remains include the hull and a windless protruding from the sand. The lightest models are suitable for indoor flight, in a windless environment.