Cristin-resultat-ID: 1622094
Sist endret: 4. februar 2019 12:09
NVI-rapporteringsår: 2018
Resultat
Vitenskapelig artikkel
2018

Eemian Greenland SMB strongly sensitive to model choice

Bidragsytere:
  • Andreas Plach
  • Kerim Hestnes Nisancioglu
  • Sebastien Le clec'h
  • Andreas Born
  • Petra Langebroek
  • Chuncheng Guo
  • mfl.

Tidsskrift

Climate of the Past
ISSN 1814-9324
e-ISSN 1814-9332
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2018
Volum: 14
Hefte: 10
Sider: 1463 - 1485
Open Access

Importkilder

Scopus-ID: 2-s2.0-85055478958

Finansiering

  • EU
    Prosjektkode: 610055
  • Norges forskningsråd
    Prosjektkode: 223272
  • Norges forskningsråd
    Prosjektkode: 229788
  • Norges forskningsråd
    Prosjektkode: 246929
  • Notur/NorStore
    Prosjektkode: NN4659K
  • Notur/NorStore
    Prosjektkode: NS4659K

Beskrivelse Beskrivelse

Tittel

Eemian Greenland SMB strongly sensitive to model choice

Sammendrag

Understanding the behavior of the Greenland ice sheet in a warmer climate, and particularly its surface mass balance (SMB), is important for assessing Greenland’s potential contribution to future sea level rise. The Eemian interglacial period, the most recent warmer-than-present period in Earth’s history approximately 125 000 years ago, provides an analogue for a warm summer climate over Greenland. The Eemian is characterized by a positive Northern Hemisphere summer insolation anomaly, which complicates Eemian SMB calculations based on positive degree day estimates. In this study, we use Eemian global and regional climate simulations in combination with three types of SMB models – a simple positive degree day, an intermediate complexity, and a full surface energy balance model – to evaluate the importance of regional climate and model complexity for estimates of Greenland’s SMB. We find that all SMB models perform well under the relatively cool pre-industrial and late Eemian. For the relatively warm early Eemian, the differences between SMB models are large, which is associated with whether insolation is included in the respective models. For all simulated time slices, there is a systematic difference between globally and regionally forced SMB models, due to the different representation of the regional climate over Greenland. We conclude that both the resolution of the simulated climate as well as the method used to estimate the SMB are important for an accurate simulation of Greenland’s SMB. Whether model resolution or the SMB method is most important depends on the climate state and in particular the prevailing insolation pattern. We suggest that future Eemian climate model intercomparison studies should include SMB estimates and a scheme to capture SMB uncertainties.

Bidragsytere

Andreas Plach

  • Tilknyttet:
    Forfatter
    ved Institutt for geovitenskap ved Universitetet i Bergen

Kerim Hestnes Nisancioglu

  • Tilknyttet:
    Forfatter
    ved Senter for Jordens utvikling og dynamikk ved Universitetet i Oslo
  • Tilknyttet:
    Forfatter
    ved Institutt for geovitenskap ved Universitetet i Bergen

Sebastien Le clec'h

  • Tilknyttet:
    Forfatter
    ved Université Paris-Saclay
  • Tilknyttet:
    Forfatter
    ved Laboratoire des Sciences du Climat et de l'Environnement
  • Tilknyttet:
    Forfatter
    ved Vrije Universiteit Brussel

Andreas Born

  • Tilknyttet:
    Forfatter
    ved Universität Bern
  • Tilknyttet:
    Forfatter
    ved Institutt for geovitenskap ved Universitetet i Bergen

Petra Langebroek

  • Tilknyttet:
    Forfatter
    ved NORCE Klima ved NORCE Norwegian Research Centre AS
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