[en] In Greenland, 87% of the glacierized area terminates in the ocean, but mass lost at the ice‐ocean interface, or frontal ablation, has not yet been fully quantified. Using measurements and models we calculate frontal ablation of Greenland's 213 outlet and 537 peripheral glaciers and find a total frontal ablation of 481.8 ± 24.0 for 2000–2010 and 510.2 ± 18.6 Gt a−1 for 2010–2020. Ice discharge accounted for ∼90% of frontal ablation during both periods, while mass loss due to terminus retreat comprised the remainder. Only 16 glaciers were responsible for the majority (>50%) of frontal ablation from 2010 to 2020. These estimates, along with the climatic‐basal balance, allow for a more complete accounting of Greenland Ice Sheet and peripheral glacier mass balance. In total, Greenland accounted for ∼90% of Northern Hemisphere frontal ablation for 2000–2010 and 2010–2020.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Kochtitzky, William ; Department of Geography Environment and Geomatics University of Ottawa Ottawa ON Canada ; School of Marine and Environmental Programs University of New England‐Biddeford Campus Biddeford ME USA
Copland, Luke ; Department of Geography Environment and Geomatics University of Ottawa Ottawa ON Canada
King, Michalea ; Applied Physics Laboratory University of Washington Seattle WA USA
Hugonnet, Romain ; LEGOS Université de Toulouse CNES CNRS IRD UPS Toulouse France ; Laboratory of Hydraulics, Hydrology and Glaciology (VAW) ETH Zürich Zürich Switzerland ; Swiss Federal Institute for Forest Snow and Landscape Research (WSL) Birmensdorf Switzerland
Jiskoot, Hester ; Department of Geography & Environment University of Lethbridge Lethbridge AB Canada
Morlighem, Mathieu ; Department of Earth Sciences Dartmouth College Hanover NH USA
Millan, Romain ; Institut des Géosciences de l'Environnement CNES Grenoble France
Khan, Shfaqat Abbas ; DTU Space Technical University of Denmark Kongens Lyngby Denmark
Noël, Brice ; Université de Liège - ULiège > Département de géographie > Climatologie et Topoclimatologie
Language :
English
Title :
Closing Greenland's Mass Balance: Frontal Ablation of Every Greenlandic Glacier From 2000 to 2020
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