En-en adult card 19 melting of ice sheets: Difference between revisions

En-en adult card 19 melting of ice sheets (view source)

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 |title=Melting of Ice Sheets
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+}}<ref>[https://www.ipcc.ch/site/assets/uploads/2018/03/WG1AR5_SummaryVolume_FINAL_FRENCH.pdf#page=56 Page 41 of the Technical Summary of the 5th IPCC Report]</ref>
 == Explanation ==
+These illustrations represent the gain or loss of mass of the caps, indicated in centimetres of water per year (cm of water/year) and measured gravimetrically. In blue the mass gain (because it snows more) and in red the losses (glaciers flow faster towards the ocean).
+== Definition ==
+An ice cap (or ice sheet or ice sheet) is a continental-scale mass of land ice, thick enough (between 1600 and 6400m<ref>[https://www.nationalgeographic.org/encyclopedia/ice-sheet/ National Geographic Resource Library]</ref>) to cover most of the underlying rock formations. There are currently only two major ice sheets, one in Greenland and one in Antarctica.<ref>[https://archive.ipcc.ch/pdf/assessment-report/ar5/wg1/WG1AR5_SummaryVolume_FINAL_FRENCH.pdf IPCC, 2013: Glossary (Planton, S. (coord.)). P.196. (French)]</ref>
+We will speak here of melting of the ice caps when the total mass of ice has decreased over the period under consideration, whatever the processes involved.
+== To go further ==
+=== Numbers ===
+Between 2006 and 2015, the loss of ice from the ice caps is :
+* 278 billion tonnes per year for Greenland
+* 155 billion tonnes per year for the Antarctic<ref>[https://www.ipcc.ch/site/assets/uploads/sites/3/2019/11/03_SROCC_SPM_FINAL.pdf#page=6 IPCC, Special report on cryosphere and oceans]</ref>.
+== References ==
+<references />