cryosphere
noun
- those portions of Earth's surface where water is in solid form
Wiktionary
noun
Etymology: From cryo- + -sphere.
- All those areas of the Earth where the surface is frozen.
“Climate change has a strong effect on the cryosphere.”
“Eventually, a complement of visible, infrared, and microwave sensors will be needed to provide all the information required in the cryosphere[…]”