Record #00506Nature archive
TerraSAR-X and TanDEM-X measurements found peak summer 2012 surface motion exceeding 46 m/day on Greenland's Jakobshavn Isbræ, equivalent to an annualised 17 km/year and then a record for observed outlet glaciers in Greenland and Antarctica.
Current Record
over46m/day
Current record value
Jakobshavn Isbræ in western Greenland drains the ice sheet into Ilulissat Icefjord and is a major subject of studies of glacier dynamics and sea-level contribution.
The exceptional 2012 measurement was a seasonal, spatially local surface-velocity peak in satellite observations. Calving-front retreat and ice conditions change flow, so 46 m/day is neither a year-round constant nor a demonstrated 2026 maximum.
Credible sources support core facts; the comparison scope or corroboration remains incomplete.
Basis: direct confirmation by an authority
DLR reported a local summer-2012 velocity over 46 m/day, a contemporaneous record among Greenland and Antarctic outlet glaciers. The period is represented at year precision only. Newer observations and other glacier classes may differ, so developing is retained.
The record concerns a 2012 summer peak in observed outlet glaciers; newer observations or different ice types may alter a broader global ranking.
Current Entry identifies the current entry in this archive; it does not establish that the record is still held today.
The record value on this page is organized from the public sources above. Measurement methods may differ; JiLuDB follows the unified method described for each entry.
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