Polar Melting: Difference between revisions
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===== Warming of +1.5 °C is too high for polar ice sheets ===== | |||
[https://www.nature.com/articles/s43247-025-02299-w by Chris R.Strokes 20/5/25 Communications earth & environment] | |||
Global mean sea level (GMSL) increased by around 20 cm from 1901 to 2018, with the rate of change accelerating from ~1.4 mm year−1 (1901–1990) to ~3.7 mm year−1 (2006–2018)1 and, most recently, to 4.5 mm year−1 (2023)2. Several processes contribute to sea-level rise (SLR), but melting of glaciers and ice sheets is the dominant source, adding ~1.6 mm year−1 from 2006 to 2018, and now exceeding thermal expansion of the oceans (~1.4 mm year−1)1. Smaller mountain glaciers and ice caps dominated the cryosphere’s contribution to GMSL rise during the 20th Century1,3,4,5 and they will continue to shrink rapidly1,6, with profound impacts on water resources and human activities | |||
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===== Sea ice controls net ocean uptake of carbon dioxide by regulating wintertime stratification ===== | ===== Sea ice controls net ocean uptake of carbon dioxide by regulating wintertime stratification ===== | ||
