Self-inhibiting growth of the Greenland Ice Sheet

Peter Lang Langen; Anne Munck Solgaard; Christine Schøtt Hvidberg

doi:10.1029/2012gl051810

Self-inhibiting growth of the Greenland Ice Sheet

Peter Lang Langen, Anne Munck Solgaard, Christine Schøtt Hvidberg

Is-, Klima- og Geofysik

9 Citationer (Scopus)

Abstract

The build-up of the Greenland Ice Sheet (GrIS) from ice-free conditions is studied in an ice sheet model (ISM) driven by fields from an atmospheric general circulation model (GCM) to demonstrate the importance of coupling between the two components. Experiments where the two are coupled off-line are augmented by one where an intermediate ice sheet configuration is coupled back to the GCM. Forcing the ISM with GCM fields corresponding to the ice-free state leads to extensive regrowth which, however, is halted when the intermediate recoupling step is included. This inhibition of further growth is due to a Föhn effect of moist air parcels being lifted over the intermediate ice sheet and arriving in the low-lying Greenland interior with high temperatures. This demonstrates that two-way coupling between the atmosphere and the ice sheet is essential for understanding the dynamics and that large scale conditions cooler than those of today may be necessary for the GrIS to regrow to the present volume

Originalsprog	Engelsk
Artikelnummer	L12502
Tidsskrift	Geophysical Research Letters
Vol/bind	39
Sider (fra-til)	1-5
Antal sider	5
ISSN	0094-8276
DOI	https://doi.org/10.1029/2012gl051810
Status	Udgivet - 28 jun. 2012

Adgang til dokumentet

10.1029/2012gl051810

https://onlinelibrary.wiley.com/doi/pdfdirect/10.1029/2012GL051810

Citationsformater

@article{ce4a28966d6b4544ac3d1a6025636045,

title = "Self-inhibiting growth of the Greenland Ice Sheet",

abstract = "The build-up of the Greenland Ice Sheet (GrIS) from ice-free conditions is studied in an ice sheet model (ISM) driven by fields from an atmospheric general circulation model (GCM) to demonstrate the importance of coupling between the two components. Experiments where the two are coupled off-line are augmented by one where an intermediate ice sheet configuration is coupled back to the GCM. Forcing the ISM with GCM fields corresponding to the ice-free state leads to extensive regrowth which, however, is halted when the intermediate recoupling step is included. This inhibition of further growth is due to a F{\"o}hn effect of moist air parcels being lifted over the intermediate ice sheet and arriving in the low-lying Greenland interior with high temperatures. This demonstrates that two-way coupling between the atmosphere and the ice sheet is essential for understanding the dynamics and that large scale conditions cooler than those of today may be necessary for the GrIS to regrow to the present volume",

author = "Langen, {Peter Lang} and Solgaard, {Anne Munck} and Hvidberg, {Christine Sch{\o}tt}",

year = "2012",

month = jun,

day = "28",

doi = "10.1029/2012gl051810",

language = "English",

volume = "39",

pages = "1--5",

journal = "Geophysical Research Letters",

issn = "0094-8276",

publisher = "Wiley-Blackwell",

}

TY - JOUR

T1 - Self-inhibiting growth of the Greenland Ice Sheet

AU - Langen, Peter Lang

AU - Solgaard, Anne Munck

AU - Hvidberg, Christine Schøtt

PY - 2012/6/28

Y1 - 2012/6/28

N2 - The build-up of the Greenland Ice Sheet (GrIS) from ice-free conditions is studied in an ice sheet model (ISM) driven by fields from an atmospheric general circulation model (GCM) to demonstrate the importance of coupling between the two components. Experiments where the two are coupled off-line are augmented by one where an intermediate ice sheet configuration is coupled back to the GCM. Forcing the ISM with GCM fields corresponding to the ice-free state leads to extensive regrowth which, however, is halted when the intermediate recoupling step is included. This inhibition of further growth is due to a Föhn effect of moist air parcels being lifted over the intermediate ice sheet and arriving in the low-lying Greenland interior with high temperatures. This demonstrates that two-way coupling between the atmosphere and the ice sheet is essential for understanding the dynamics and that large scale conditions cooler than those of today may be necessary for the GrIS to regrow to the present volume

AB - The build-up of the Greenland Ice Sheet (GrIS) from ice-free conditions is studied in an ice sheet model (ISM) driven by fields from an atmospheric general circulation model (GCM) to demonstrate the importance of coupling between the two components. Experiments where the two are coupled off-line are augmented by one where an intermediate ice sheet configuration is coupled back to the GCM. Forcing the ISM with GCM fields corresponding to the ice-free state leads to extensive regrowth which, however, is halted when the intermediate recoupling step is included. This inhibition of further growth is due to a Föhn effect of moist air parcels being lifted over the intermediate ice sheet and arriving in the low-lying Greenland interior with high temperatures. This demonstrates that two-way coupling between the atmosphere and the ice sheet is essential for understanding the dynamics and that large scale conditions cooler than those of today may be necessary for the GrIS to regrow to the present volume

U2 - 10.1029/2012gl051810

DO - 10.1029/2012gl051810

M3 - Journal article

SN - 0094-8276

VL - 39

SP - 1

EP - 5

JO - Geophysical Research Letters

JF - Geophysical Research Letters

M1 - L12502

ER -

Self-inhibiting growth of the Greenland Ice Sheet

Abstract

Adgang til dokumentet

Fingeraftryk

Citationsformater