Ocean forcing drives glacier retreat in Greenland
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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Ocean forcing drives glacier retreat in Greenland. / Wood, Michael; Rignot, Eric; Fenty, Ian; An, Lu; Bjørk, Anders; van den Broeke, Michiel; Cai, Cilan; Kane, Emily; Menemenlis, Dimitris; Millan, Romain; Morlighem, Mathieu; Mouginot, Jeremie; Noël, Brice; Scheuchl, Bernd; Velicogna, Isabella; Willis, Josh K.; Zhang, Hong.
I: Science Advances, Bind 7, Nr. 1, eaba7282, 01.01.2021.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Ocean forcing drives glacier retreat in Greenland
AU - Wood, Michael
AU - Rignot, Eric
AU - Fenty, Ian
AU - An, Lu
AU - Bjørk, Anders
AU - van den Broeke, Michiel
AU - Cai, Cilan
AU - Kane, Emily
AU - Menemenlis, Dimitris
AU - Millan, Romain
AU - Morlighem, Mathieu
AU - Mouginot, Jeremie
AU - Noël, Brice
AU - Scheuchl, Bernd
AU - Velicogna, Isabella
AU - Willis, Josh K.
AU - Zhang, Hong
PY - 2021/1/1
Y1 - 2021/1/1
N2 - The retreat and acceleration of Greenland glaciers since the mid-1990s have been attributed to the enhanced intrusion of warm Atlantic Waters (AW) into fjords, but this assertion has not been quantitatively tested on a Greenland-wide basis or included in models. Here, we investigate how AW influenced retreat at 226 marine-terminating glaciers using ocean modeling, remote sensing, and in situ observations. We identify 74 glaciers in deep fjords with AW controlling 49% of the mass loss that retreated when warming increased undercutting by 48%. Conversely, 27 glaciers calving on shallow ridges and 24 in cold, shallow waters retreated little, contributing 15% of the loss, while 10 glaciers retreated substantially following the collapse of several ice shelves. The retreat mechanisms remain undiagnosed at 87 glaciers without ocean and bathymetry data, which controlled 19% of the loss. Ice sheet projections that exclude ocean-induced undercutting may underestimate mass loss by at least a factor of 2.
AB - The retreat and acceleration of Greenland glaciers since the mid-1990s have been attributed to the enhanced intrusion of warm Atlantic Waters (AW) into fjords, but this assertion has not been quantitatively tested on a Greenland-wide basis or included in models. Here, we investigate how AW influenced retreat at 226 marine-terminating glaciers using ocean modeling, remote sensing, and in situ observations. We identify 74 glaciers in deep fjords with AW controlling 49% of the mass loss that retreated when warming increased undercutting by 48%. Conversely, 27 glaciers calving on shallow ridges and 24 in cold, shallow waters retreated little, contributing 15% of the loss, while 10 glaciers retreated substantially following the collapse of several ice shelves. The retreat mechanisms remain undiagnosed at 87 glaciers without ocean and bathymetry data, which controlled 19% of the loss. Ice sheet projections that exclude ocean-induced undercutting may underestimate mass loss by at least a factor of 2.
U2 - 10.1126/sciadv.aba7282
DO - 10.1126/sciadv.aba7282
M3 - Journal article
C2 - 33523831
AN - SCOPUS:85098737542
VL - 7
JO - Science advances
JF - Science advances
SN - 2375-2548
IS - 1
M1 - eaba7282
ER -
ID: 255448113