Glossary
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NSIDC's Glossary contains general and scientific terms related to
Earth's frozen places. You can search for particular terms in the
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yedoma
A type of Pleistocene-age (formed 1.8 million to 10,000 years before present) permafrost that contains a significant amount of organic material with ice content of 50–90% by volume. Thawing yedoma is a significant source of atmospheric methane.
A yedoma in Russia shows the thick layer of ice and carbon material exposed along this body of water. --Credit: Vladimir Romanovsky
young ice
a general category of ice that represents the transition between nilas and first-year ice; usually 10 to 30 centimeters (4 to 12 inches) thick.
Young's Modulus
the ratio of increase in stress acting on a test specimen, to the resulting increase in strain, under constant transverse stress.
