TY - JOUR
T1 - The unquantified mass loss of Northern Hemisphere marine-terminating glaciers from 2000–2020
AU - Kochtitzky, William
AU - Copland, Luke
AU - Van Wychen, Wesley
AU - Hugonnet, Romain
AU - Hock, Regine
AU - Dowdeswell, Julian A.
AU - Benham, Toby
AU - Strozzi, Tazio
AU - Glazovsky, Andrey
AU - Lavrentiev, Ivan
AU - Rounce, David R.
AU - Millan, Romain
AU - Cook, Alison
AU - Dalton, Abigail
AU - Jiskoot, Hester
AU - Cooley, Jade
AU - Jania, Jacek
AU - Navarro, Francisco
N1 - Publisher Copyright:
© 2022, The Author(s). Author not affiliated to SAMS on this publication.
Funding Information:
The start of this project and early ideas that informed this work were a result of the “Workshop on the Importance of Calving for the Mass Balance of Arctic Glaciers” held in Sopot, Poland in 2016, sponsored by the Centre for Polar Studies, University of Silesia and the IASC Network on Arctic Glaciology. We thank Ruitang Yang for her help in improving the error analysis. W.K. acknowledges support from the Vanier Graduate Scholarship. L.C. thanks the Natural Sciences and Engineering Research Council of Canada, University of Ottawa and ArcticNet Network of Centres of Excellence Canada for funding. T.S. acknowledges support from the ESA Glaciers CCI project. A.G. and I.L. thank RG State Contract FMGE-2019-0004, and H.J. the Natural Sciences and Engineering Research Council of Canada. Re.Ho. and D.R.R. acknowledge support from the NASA grant 80NSSC20K1296.
Funding Information:
The start of this project and early ideas that informed this work were a result of the “Workshop on the Importance of Calving for the Mass Balance of Arctic Glaciers” held in Sopot, Poland in 2016, sponsored by the Centre for Polar Studies, University of Silesia and the IASC Network on Arctic Glaciology. We thank Ruitang Yang for her help in improving the error analysis. W.K. acknowledges support from the Vanier Graduate Scholarship. L.C. thanks the Natural Sciences and Engineering Research Council of Canada, University of Ottawa and ArcticNet Network of Centres of Excellence Canada for funding. T.S. acknowledges support from the ESA Glaciers CCI project. A.G. and I.L. thank RG State Contract FMGE-2019-0004, and H.J. the Natural Sciences and Engineering Research Council of Canada. Re.Ho. and D.R.R. acknowledge support from the NASA grant 80NSSC20K1296.
PY - 2022/10/11
Y1 - 2022/10/11
N2 - In the Northern Hemisphere, ~1500 glaciers, accounting for 28% of glacierized area outside the Greenland Ice Sheet, terminate in the ocean. Glacier mass loss at their ice-ocean interface, known as frontal ablation, has not yet been comprehensively quantified. Here, we estimate decadal frontal ablation from measurements of ice discharge and terminus position change from 2000 to 2020. We bias-correct and cross-validate estimates and uncertainties using independent sources. Frontal ablation of marine-terminating glaciers contributed an average of 44.47 ± 6.23 Gt a−1 of ice to the ocean from 2000 to 2010, and 51.98 ± 4.62 Gt a−1 from 2010 to 2020. Ice discharge from 2000 to 2020 was equivalent to 2.10 ± 0.22 mm of sea-level rise and comprised approximately 79% of frontal ablation, with the remainder from terminus retreat. Near-coastal areas most impacted include Austfonna, Svalbard, and central Severnaya Zemlya, the Russian Arctic, and a few Alaskan fjords.
AB - In the Northern Hemisphere, ~1500 glaciers, accounting for 28% of glacierized area outside the Greenland Ice Sheet, terminate in the ocean. Glacier mass loss at their ice-ocean interface, known as frontal ablation, has not yet been comprehensively quantified. Here, we estimate decadal frontal ablation from measurements of ice discharge and terminus position change from 2000 to 2020. We bias-correct and cross-validate estimates and uncertainties using independent sources. Frontal ablation of marine-terminating glaciers contributed an average of 44.47 ± 6.23 Gt a−1 of ice to the ocean from 2000 to 2010, and 51.98 ± 4.62 Gt a−1 from 2010 to 2020. Ice discharge from 2000 to 2020 was equivalent to 2.10 ± 0.22 mm of sea-level rise and comprised approximately 79% of frontal ablation, with the remainder from terminus retreat. Near-coastal areas most impacted include Austfonna, Svalbard, and central Severnaya Zemlya, the Russian Arctic, and a few Alaskan fjords.
UR - https://www.scopus.com/pages/publications/85139659172
UR - https://www.scopus.com/pages/publications/85139659172#tab=citedBy
U2 - 10.1038/s41467-022-33231-x
DO - 10.1038/s41467-022-33231-x
M3 - Article
C2 - 36220807
AN - SCOPUS:85139659172
SN - 2041-1723
VL - 13
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 5835
ER -