When scientists talk about the cryosphere, they mean the places on Earth where water is in its solid form, frozen into ice or snow. Read more ...
Cryosphere Glossary
sastrugi
complex, fragile shapes of snow on top of sea ice that resemble sand dunes; they form parallel to the prevailing wind direction; sastrugi can also form on snow cover over land.
Sastrugi at South Pole Station, Antarctica. (Photo courtesy of Fred Walton, NOAA Corps Collection.)