En-en adult card 16 melting of glaciers: Difference between revisions
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=== Consequences === | === Consequences === | ||
[[En-en adult card 22 sea level rise|Sea level rise]] A melting of 100 gigatons of ice per year is equivalent to about 0.28 mm per year of mean sea level rise<ref>[https://www.ipcc.ch/site/assets/uploads/2018/03/WG1AR5_SPM_brochure_fr.pdf IPCC Report 2013 - Summary for Policymakers p7 (French)]</ref>. Thus, 15 to 35% | [[En-en adult card 22 sea level rise|Sea level rise]] A melting of 100 gigatons of ice per year is equivalent to about 0.28 mm per year of mean sea level rise<ref>[https://www.ipcc.ch/site/assets/uploads/2018/03/WG1AR5_SPM_brochure_fr.pdf IPCC Report 2013 - Summary for Policymakers p7 (French)]</ref>. Thus, 15 to 35% of sea level rise is linked to the melting of glaciers, according the IPCC scenarios. 30% to 35% is linked to the expansion of water. The remainder is linked to the melting of the ice caps. | ||
[[En-en adult card 31 freshwater resources|Freshwater Resources]] Melting glaciers threaten water supplies. Indeed, the relative importance of glacier melt water in summer can be considerable, contributing for example to 25% of August flows in the basins draining the European Alps, with an area of about 105 | [[En-en adult card 31 freshwater resources|Freshwater Resources]] Melting glaciers threaten water supplies. Indeed, the relative importance of glacier melt water in summer can be considerable, contributing for example to 25% of August flows in the basins draining the European Alps, with an area of about 105 km<sup>2</sup> and only 1% glacial cover<ref>[https://www.ipcc.ch/site/assets/uploads/2018/02/WGIIAR5-Chap3_FINAL.pdf Freshwater Report 3.4.3 Glaciers, p243]</ref>. | ||
Their disappearance could be catastrophic for cities located in valleys watered by rivers flowing down from the surrounding mountains and for freshwater fauna. Glacier meltwater also increases in importance during [[En-en adult card 30 droughts|droughts]] and [[En-en adult card 36 heat waves|heat waves]]. | Their disappearance could be catastrophic for cities located in valleys watered by rivers flowing down from the surrounding mountains and for freshwater fauna. Glacier meltwater also increases in importance during [[En-en adult card 30 droughts|droughts]] and [[En-en adult card 36 heat waves|heat waves]]. | ||
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=== Consequences === | === Consequences === | ||
[[En-en adult card 26 river flooding|River flooding]] It is possible, in certain circumstances of high heat, that | [[En-en adult card 26 river flooding|River flooding]] It is possible, in certain circumstances of high heat, that very fast rapid melting of glaciers may cause flooding. But the real concern about these glaciers is that they are gradually disappearing, depriving downstream irrigation of a top-up in summer. | ||
== To go further == | == To go further == | ||
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== References == | == References == | ||
<references /> | <references /> | ||
[[fr:Fr-fr_adulte_carte_16_fonte_des_glaciers]] | |||