{"id":464470,"date":"2026-08-20T11:11:08","date_gmt":"2026-08-20T18:11:08","guid":{"rendered":"https:\/\/climatescience.press\/?p=464470"},"modified":"2026-08-20T11:11:10","modified_gmt":"2026-08-20T18:11:10","slug":"antarcticas-brief-ice-rebound-was-natural-climate-variability-not-a-new-normal","status":"publish","type":"post","link":"https:\/\/climatescience.press\/?p=464470","title":{"rendered":"Antarctica\u2019s Brief Ice Rebound Was Natural Climate Variability \u2014 Not a New Normal"},"content":{"rendered":"\n
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AI generated by Grok<\/figcaption><\/figure>\n\n\n\n

Antarctica\u2019s brief ice-mass rebound (roughly 2021\u20132023) was driven by natural climate variability linked to multiyear warming in the tropical warm pool, not a sustained new trend or \u201cnew normal\u201d from global warming.<\/strong><\/p>\n\n\n\n

A study published 19 August 2026 in Nature (with University of Washington co-author Eric Steig and collaborators from other institutions) examined the temporary slowdown in Antarctic Ice Sheet mass loss.<\/p>\n\n\n\n

Between about July 2021 and April 2023, satellite gravity data (GRACE\/GRACE-FO)<\/strong> showed the continent gained roughly 695 billion tonnes of mass\u2014the largest such event in the satellite record since 2003\u2014temporarily offsetting the long-term average loss of about 140 Gt per year.<\/p>\n\n\n\n

Most of the gain (~68%) occurred in East Antarctica\u2019s Queen Mary Land\u2013Wilkes Land <\/strong>sector due to exceptional snowfall\/precipitation. West Antarctica continued losing mass.<\/p>\n\n\n\n

UW professor Eric Steig noted: \u201cWhen something changes, it is very tempting, even to scientists, to think \u2018Oh, there\u2019s a new normal happening,\u2019 but this analysis shows that\u2019s not the case. This is most likely a short-lived phenomenon.\u201d<\/p>\n\n\n\n

The connection to human-caused global warming is described as tenuous; the pattern aligns with natural background variability in the tropical climate system.<\/p>\n\n\n\n

Antarctica has been losing mass overall for decades, primarily through ocean-driven melting and ice discharge (especially in West Antarctica).<\/p>\n\n\n\n

Annual snowfall has not kept pace with losses on longer timescales. The 2021\u20132023 event was a temporary interruption; researchers emphasize it does not indicate a reversal of the longer-term decline or a sustained, warming-driven increase in Antarctic precipitation.<\/p>\n\n\n\n

The Antarctic Ice Sheet remains the largest source of uncertainty in long-term sea-level projections.<\/p>\n\n\n\n

Understanding short-term variability versus forced trends is important for interpreting future observations.<\/p>\n\n\n\n

_____________________________________________________________________________________<\/p>\n\n\n\n

Multiyear tropical warm pool warming drives slowdown in Antarctic mass loss<\/strong><\/p>\n\n\n\n

Antarctic Ice Sheet (AIS)<\/strong> mass loss has been a major contributor to global sea-level rise for most of recent decades, driven mainly by West Antarctica. During 2021\u20132023, a sharp rise in surface mass balance over Queen Mary Land and Wilkes Land (East Antarctica) offset West Antarctic losses and slowed the overall rate of ice-mass loss.<\/p>\n\n\n\n

Although this temporary slowdown is consistent with the expected long-term precipitation response to global warming (poleward-shifted storm tracks and Antarctic moistening), the study identifies a different primary mechanism:<\/p>\n\n\n\n