The unquantified mass loss of Northern Hemisphere marine-terminating glaciers from 2000-2020

被引：40

作者：

Kochtitzky, William ^{[1
]}

Copland, Luke ^{[1
]}

Van Wychen, Wesley ^{[1
,2
]}

Hugonnet, Romain ^{[3
,4
,5
]}

Hock, Regine ^{[6
,7
]}

Dowdeswell, Julian A. ^{[8
]}

Benham, Toby ^{[8
]}

Strozzi, Tazio ^{[9
]}

Glazovsky, Andrey ^{[10
]}

Lavrentiev, Ivan ^{[10
]}

Rounce, David R. ^{[11
]}

Millan, Romain ^{[12
]}

Cook, Alison ^{[1
]}

Dalton, Abigail ^{[1
]}

Jiskoot, Hester ^{[13
]}

Cooley, Jade ^{[13
]}

Jania, Jacek ^{[14
]}

Navarro, Francisco ^{[15
]}

机构：

[1] Univ Ottawa, Dept Geog Environm & Geomat, Ottawa, ON K1N 6N5, Canada

[2] Univ Waterloo, Dept Geog & Environm Management, Waterloo, ON, Canada

[3] Univ Toulouse, CNES, LEGOS, CNRS,IRD,UPS, Toulouse, France

[4] Swiss Fed Inst Technol, Lab Hydraul Hydrol & Glaciol VAW, Zurich, Switzerland

[5] Swiss Fed Inst Forest Snow & LandscapeRes WSL, Birmensdorf, Switzerland

[6] Univ Oslo, Dept Geosci, Oslo, Norway

[7] Univ Alaska Fairbanks, Inst Geophys, Fairbanks, AK 99775 USA

[8] Univ Cambridge, Scott Polar Res Inst, Cambridge, England

[9] Gamma Remote Sensing, Gumlingen, BE, Switzerland

[10] Russian Acad Sci, Inst Geog, Moscow, Russia

[11] Carnegie Mellon Univ, Dept Civil & Environm Engn, Pittsburgh, PA 15213 USA

[12] CNES, Inst Geosci Environm, Grenoble, France

[13] Univ Lethbridge, Dept Geog & Environm, Lethbridge, AB, Canada

[14] Univ Silesia, Katowice, Poland

[15] Univ Politecn Madrid, Madrid, Spain

来源：

NATURE COMMUNICATIONS | 2022年 / 13卷 / 01期

基金：

加拿大自然科学与工程研究理事会;

关键词：

SURGE-TYPE GLACIERS; ICE DISCHARGE; INTERANNUAL VARIABILITY; COMPLETE INVENTORY; DYNAMIC DISCHARGE; FRONTAL ABLATION; SEVERNAYA ZEMLYA; SVALBARD; BALANCE; VELOCITIES;

D O I：

10.1038/s41467-022-33231-x

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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.

引用

页数：10

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