# Frozen Ground

(Difference between revisions)
 Revision as of 11:47, 11 September 2011 (edit)Joe (Talk | contribs)← Previous diff Current revision (11:49, 11 September 2011) (edit) (undo)Joe (Talk | contribs) (One intermediate revision not shown.) Line 2: Line 2: '''[[Frozen Ground]]''' is '''[[Soil]]''' or '''[[Rock]]''' in which part or all of the pore '''[[water]]''' has turned into '''[[ice]]'''. '''[[Frozen Ground]]''' is '''[[Soil]]''' or '''[[Rock]]''' in which part or all of the pore '''[[water]]''' has turned into '''[[ice]]'''. - Frozen ground occurs when the ground contains '''[[water]]''', and the temperature of the ground goes down below '''0°''' Celsius (32° Fahrenheit). It can make a big difference if the ground stays frozen all year, or if the ground freezes and '''[[thaws]]'''. + Frozen ground occurs when the ground contains '''[[water]]''', and the temperature of the ground goes down below '''0°''' Celsius (32° Fahrenheit). + + It can make a big difference if the ground stays frozen all year, or if the ground freezes and '''[[thaws]]'''. More than half of all the land in the Northern Hemisphere freezes and thaws every year, and is called '''[[seasonally frozen ground]]'''. More than half of all the land in the Northern Hemisphere freezes and thaws every year, and is called '''[[seasonally frozen ground]]'''. Line 10: Line 12: - == Also see == + =='''Also see''' == *'''[[Snow temperature gradient]]''' *'''[[Snow temperature gradient]]''' *'''[[What Affects Frozen Ground]]?''' *'''[[What Affects Frozen Ground]]?''' Line 28: Line 30: - + == '''Reference;''' == - == Reference; == + - + - + * 1 The National Snow and Ice Data Center NSIDC [http://nsidc.org/cgi-bin/words/glossary.pl] * 1 The National Snow and Ice Data Center NSIDC [http://nsidc.org/cgi-bin/words/glossary.pl]

## Current revision

Frozen Ground is Soil or Rock in which part or all of the pore water has turned into ice.

Frozen ground occurs when the ground contains water, and the temperature of the ground goes down below Celsius (32° Fahrenheit).

It can make a big difference if the ground stays frozen all year, or if the ground freezes and thaws.

More than half of all the land in the Northern Hemisphere freezes and thaws every year, and is called seasonally frozen ground.

One-fourth of the land in the Northern Hemisphere has an underground layer that stays frozen all year long. Ground that stays frozen for at least two years in a row is called permafrost.

##  Reference;

• 1 The National Snow and Ice Data Center NSIDC [1]