Newly published science reveals scientists grossly underestimated the timescales for land uplift in compensating for Western Antarctica ice mass loss, leading them to conclude “the ice sheet may stabilize against catastrophic collapse” (Barletta et al., 2018). Furthermore, even if the most vulnerable ice shelves in the Antarctic Peninsula did collapse completely, the total ice melt contribution to sea level would be negligible – less than 1 centimeter by 2100 (Schannwell et al., 2018).
In recent decades, Antarctic climate trends have not been favoring alarmist perspectives predicated on the assumption that anthropogenic CO2 emissions are catastrophically melting glaciers and contributing heavily to sea level rise.
For example, the ice melt contribution to global sea levels for Antarctica as a whole was about one-third of a centimeter during the 56 years from 1958-2014 (Frederiske et al., 2018).
Image Source: Frederiske et al., 2018 (annotations added)
East Antarctica has been cooling (Clem et al., 2018) and gaining ice mass (Martín-Español et al., 2017) in recent decades.
“Over the past 60 years, the climate of East Antarctica cooled while portions of West Antarctica were among the most rapidly warming regions on the planet. The East Antarctic cooling is attributed to a positive trend in the Southern Annular Mode (SAM) and a strengthening of the westerlies, while West Antarctic warming is tied to zonally asymmetric circulation changes forced by the tropics. This study finds recent (post-1979) surface cooling of East Antarctica during austral autumn to also be tied to tropical forcing, namely, an increase in La Niña events. … This enhanced cooling over western East Antarctica is tied more broadly to a zonally asymmetric temperature trend pattern across East Antarctica during autumn that is consistent with a tropically forced Rossby wave rather than a SAM pattern; the positive SAM pattern is associated with ubiquitous cooling across East Antarctica.” (Clem et al., 2018)