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
fast ice
ice that is anchored to the shore or ocean bottom, typically over shallow ocean shelves at continental margins; fast ice is defined by the fact that it does not move with the winds or currents.
Note: This is land fast ice. (Photo courtesy of Michael Van Woert, National Oceanic and Atmospheric Administration/Department of Commerce.)