Diferencies ente revisiones de «Indlandsis de L'Antártida»

Nature 421, 245-249 (16 January 2003) | doi:10.1038; Received 25 July 2002; Accepted 12 November 2002</ref>

 

Ice enters the sheet through precipitation as snow. This snow is then compacted to form glacier ice which moves under gravity towards the coast. Most of it is carried to the coast by fast moving [[ice stream]]s. The ice then passes into the ocean, often forming vast floating [[ice shelves]]. These shelves then melt or [[Ice calving|calve]] off to give [[iceberg]]s that eventually melt.

 

The atmospheric warming cannot be directly linked to the recent mass losses in [[West Antarctica]]. This mass loss is more likely to be due to increased melting of the ice shelves because of changes in ocean circulation patterns. This in turn causes the ice streams to speed up.<ref name=payne2004>{{cite journal |author=Payne A.J., Vieli A., Shepherd A.P., Wingham D.J., Rignot Y. |title=Recent dramatic thinning of largest West Antarctic ice stream triggered by oceans |journal=[[Geophys. Res. Lett.]] |volume=31 |pages=L23401 |year=2004 |doi=10.1029/2004GL021284}}</ref>

The melting and disappearance of the floating ice shelves will only have a small effect on sía level, which is due to salinity differences.<ref>[http://www.physorg.com/news5619.html Peter Noerdlinger, PHYSORG.COM "Melting of Floating Ice Will Raise Sía Level"]</ref><ref>{{cite journal |last=Noerdlinger |first=P.D. |coauthors=Brower, K.R. |year=2007 |month=July |title=The melting of floating ice raises the ocean level |journal=Geophysical Journal International |volume=170 |issue=1 |pages=145–150 |doi=10.1111/j.1365-246X.2007.03472.x |accessdate=22 de xineru de 2009 }}</ref><ref>{{cite journal |last=Jenkins |first=A. |coauthors=Holland, D. |year=2007 |month=August |title=Melting of floating ice and sía level rise |journal=Geophysical Research Letters |volume=34 |issue=16 |doi=10.1029/2007GL030784 |accessdate=22 de xineru de 2009 |pages=L16609 }}</ref>

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