Editing Snow (section)

===Seasonal===
{{Main|Snowpack|Névé}}
Over the course of time, a snowpack may settle under its own weight until its density is approximately 30% of water. Increases in density above this initial compression occur primarily by melting and refreezing, caused by temperatures above freezing or by direct solar radiation. In colder climates, snow lies on the ground all winter. By late spring, snow densities typically reach a maximum of 50% of water.<ref>{{cite web|url=http://cdec.water.ca.gov/snow/misc/density.html|author=California Data Exchange Center|publisher=Department of Water Resources California|title=Depth and Density|year=2007|access-date=July 8, 2009|url-status=live|archive-url=https://web.archive.org/web/20090713000814/http://cdec.water.ca.gov/snow/misc/density.html|archive-date=July 13, 2009|df=mdy-all}}</ref> Snow that persists into summer evolves into [[névé]], granular snow, which has been partially melted, refrozen and compacted. Névé has a minimum [[density]] of {{convert|500|kg/m3|lb/ft3}}, which is [[Density#Water|roughly half]] of the density of liquid water.<ref>{{cite web|author=Glossary of Meteorology|title=Firn|url=http://amsglossary.allenpress.com/glossary/search?id=firn1|year=2009|access-date=June 30, 2009|publisher=[[American Meteorological Society]]|url-status=dead|archive-url=https://web.archive.org/web/20070824054449/http://amsglossary.allenpress.com/glossary/search?id=firn1|archive-date=August 24, 2007|df=mdy-all}}</ref>