beautiful patterns of sastrugi, parallel wavelike ridges caused by winds on surface of hard snow, with soft blue sky

stratugi windblown pattern zastrugi sastrugi wavelike polar north canada snow winter nature arctic sky outdoors landscape outdoor cold tundra grooves ridges northern natural sastrugus seasons blue snowcovered travel weather white wind parallel arviat nunavut carved formation land ridge ripples scenery scene uqalurait waves windswept blown