航拍视角：冬季风蚀在白色雪地上雕刻出 sastrugi（风棱）的涟漪。寒冷天气特征，严酷寒冷，层层叠

d footage captures sastrugi ripples sculpted by wind erosion across white snow surface in winter. Cold light, wind shaped texture, and seasonal detail add depth and a clear sense of conditions. Height and wide coverage help separate patterns, routes, and textures without visual clutter. It works well for travel, geography, nature, and seasonal environment themes.