The mechanisms behind Jakobshavn Isbræ's acceleration and mass loss: A 3‐D thermomechanical model study

Bondzio, Johannes H.; Morlighem, Mathieu; Seroussi, Hélène; Kleiner, Thomas; Rückamp, Martin; Mouginot, Jeremie; Moon, Twila; Larour, Eric Y.; Humbert, Angelika

doi:10.1002/2017gl073309

i

The mechanisms behind Jakobshavn Isbræ's acceleration and mass loss: A 3‐D thermomechanical model study

Supporting Files

2017
By Bondzio, Johannes H. ; Morlighem, Mathieu ; Seroussi, Hélène ; ...

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Journal Title:

Geophysical Research Letters
Personal Author:

Bondzio, Johannes H. ; Morlighem, Mathieu ; Seroussi, Hélène ; Kleiner, Thomas ; Rückamp, Martin ; Mouginot, Jeremie ; Moon, Twila ; Larour, Eric Y. ; Humbert, Angelika
NOAA Program & Office:

NESDIS (National Environmental Satellite, Data, and Information Service) ; NCEI (National Centers for Environmental Information)
Description:

ThemechanismscausingwidespreadﬂowaccelerationofJakobshavnIsbræ,WestGreenland, remainuncleardespiteanabundanceofobservationsandmodelingstudies.Herewesimulatetheglacier’s evolutionfrom1985to2016usingathree-dimensionalthermomechanicaliceﬂowmodel.Themodel capturesthetimingand90%oftheobservedchangesbyforcingthecalvingfront.Basaldraginthetroughislow,andlateraldragbalancestheicestream’sdrivingstress.Thecalvingfrontpositionisthedominant controlonchangesofJakobshavnIsbræsincetheiceviscosityintheshearmarginsinstantaneouslydrops inresponsetothestressperturbationcausedbycalvingfrontretreat,whichallowsforwidespreadﬂowacceleration.Gradualshearmarginwarmingcontribut es5to10%tothetotalacceleration.Oursimulations suggest that the glacier will contribute to eustatic sea level rise at a rate comparable to or higher
Keywords:

General Earth And Planetary Sciences Geophysics General Earth And Planetary Sciences General Earth And Planetary Sciences
Source:

Geophysical Research Letters, 44(12), 6252-6260
DOI:

https://doi.org/10.1002/2017gl073309
ISSN:

0094-8276 ; 1944-8007
Format:

PDF
Publisher:

American Geophysical Union (AGU)
Document Type:

Journal Article
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Other
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Library
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urn:sha256:146fa01c430d1a1b1bae6af57bc772f5bbdbebc833e19dc77abeccd8cc862d40
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https://repository.library.noaa.gov/view/noaa/52665/noaa_52665_DS1.pdf
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[PDF - 6.40 MB ]

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