Atmospheric forcing of rapid marine-terminating glacier retreat in the Canadian Arctic Archipelago

被引：54

作者：

Cook, Alison J. ^{[1
,2
]}

Copland, Luke ^{[2
]}

Noel, Brice P. Y. ^{[3
]}

Stokes, Chris R. ^{[1
]}

Bentley, Michael J. ^{[1
]}

Sharp, Martin J. ^{[4
]}

Bingham, Robert G. ^{[5
]}

van den Broeke, Michiel R. ^{[3
]}

机构：

[1] Univ Durham, Dept Geog, Durham, England

[2] Univ Ottawa, Dept Geog Environm & Geomat, Ottawa, ON, Canada

[3] Univ Utrecht, Inst Marine & Atmospher Res IMAU, Utrecht, Netherlands

[4] Univ Alberta, Dept Earth & Atmospher Sci, Edmonton, AB, Canada

[5] Univ Edinburgh, Sch GeoSci, Edinburgh, Midlothian, Scotland

来源：

SCIENCE ADVANCES | 2019年 / 5卷 / 03期

基金：

加拿大自然科学与工程研究理事会; 加拿大创新基金会;

关键词：

ICE-OCEAN INTERACTION; MASS-LOSS; DYNAMIC DISCHARGE; NORTH-ATLANTIC; BAFFIN-ISLAND; BYLOT ISLAND; NUNAVUT; VELOCITIES; ELLESMERE; WATER;

D O I：

10.1126/sciadv.aau8507

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：

The Canadian Arctic Archipelago contains >300 glaciers that terminate in the ocean, but little is known about changes in their frontal positions in response to recent changes in the ocean-climate system. Here, we examine changes in glacier frontal positions since the 1950s and investigate the relative influence of oceanic temperature versus atmospheric temperature. Over 94% of glaciers retreated between 1958 and 2015, with a region-wide trend of gradual retreat before similar to 2000, followed by a fivefold increase in retreat rates up to 2015. Retreat patterns show no correlation with changes in subsurface ocean temperatures, in clear contrast to the dominance of ocean forcing in western Greenland and elsewhere. Rather, significant correlations with surface melt indicate that increased atmospheric temperature has been the primary driver of the acceleration in marine-terminating glacier frontal retreat in this region.

引用

页数：10

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