Hektoria Glacier Retreats 15 Miles in 15 Months, Setting Grounded Ice Loss Record
Updated
Updated · ScienceDaily · May 23
Hektoria Glacier Retreats 15 Miles in 15 Months, Setting Grounded Ice Loss Record
2 articles · Updated · ScienceDaily · May 23
25 kilometers of Hektoria Glacier vanished between early 2022 and spring 2023, with more than 8 kilometers lost in one two-month burst—the fastest modern retreat ever recorded for grounded glacial ice.
Scientists traced the collapse to January 2022 breakup of landfast sea ice after warming and ocean swells removed support, then to buoyancy-driven calving as thinning ice on a flat bedrock plain began lifting off the ground.
The eastern Antarctic Peninsula glacier lost both its floating ice tongue and a large section of grounded ice, a combination that directly adds to sea-level rise even though Hektoria itself is relatively small.
The retreat follows the 2002 Larsen B ice-shelf collapse that had destabilized nearby glaciers, and researchers say similar processes at larger Antarctic glaciers could have far bigger global consequences.
NASA-linked researchers expect Hektoria's most violent phase is over and retreat to slow, while NISAR and SWOT satellites may help detect comparable rapid collapses elsewhere.
Was this record collapse a preview of what will happen to Antarctica’s much larger “doomsday glacier”?
If our models underestimate glacier collapse, what other climate tipping points are we dangerously misjudging?
The Fastest Retreat of Grounded Antarctic Ice: Hektoria Glacier’s 25 km Collapse (2022–2023) and Its Warning for the World
Overview
Between January 2022 and March 2023, Hektoria Glacier in Antarctica underwent a record-breaking and rapid retreat, losing about 25 kilometers in length. This dramatic change included an intense two-month period when the glacier’s terminus pulled back by more than 8 kilometers, marking the fastest rate of grounded glacial ice loss ever seen in modern history. The rapid loss of grounded ice signaled a fundamental shift in the glacier’s stability, challenging the usual slow pace of glacial change and highlighting the urgent need for close scientific monitoring and understanding of such unprecedented events.