Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Sensitivity of the Late Saalian (140 kyrs BP) and LGM (21 kyrs BP) Eurasian ice sheet surface mass balance to vegetation feedbacks
Joseph Fourier University, France.
Joseph Fourier University, France.
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för geologi och geokemi.
2009 (engelsk)Inngår i: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 36, artikkel-id L08704Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

This work uses an atmospheric general circulation model (AGCM) asynchronously coupled to an equilibrium vegetation model to investigate whether vegetation feedbacks could be one of the reasons why the Late Saalian ice sheet (140 kyrs BP) in Eurasia was substantially larger than the Last Glacial Maximum (LGM, 21 kyrs BP) Eurasian ice sheet. The modeled vegetation changes induce a regional cooling for the Late Saalian while they cause a slight regional warming for LGM. As a result, ablation along the margins of the Late Saalian ice sheet is significantly reduced, leading to an increased surface mass balance, while there are no significant mass balance changes observed from vegetation feedbacks at LGM.

sted, utgiver, år, opplag, sider
2009. Vol. 36, artikkel-id L08704
Emneord [en]
vegetation modeling, Late Saalian, Quaternary, climate, ice sheet, surface mass balance
HSV kategori
Identifikatorer
URN: urn:nbn:se:su:diva-29299DOI: 10.1029/2009GL037200ISI: 000265534000002OAI: oai:DiVA.org:su-29299DiVA, id: diva2:232269
Prosjekter
ANR IDEGLACEExplora Doc Rohnes AlpesLavoisier Cotutelle - FranceThe Bert Bolin Centre for Climate ResearchTilgjengelig fra: 2009-08-21 Laget: 2009-08-20 Sist oppdatert: 2022-02-25bibliografisk kontrollert
Inngår i avhandling
1. On the Late Saalian glaciation: A climate modeling study
Åpne denne publikasjonen i ny fane eller vindu >>On the Late Saalian glaciation: A climate modeling study
2009 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

This thesis focuses on the glaciation of the Late Saalian period (160 -140 ka) over Eurasia. The Quaternary Environment of the Eurasian North (QUEEN) project determined that during this period, the Eurasian ice sheet was substantially larger than during the entire Weichselian cycle and especially that of the Last Glacial Maximum (21 ka, LGM). The Late Saalian astronomical forcing was different than during the LGM while greenhouse gas concentrations were similar. To understand how this ice sheet could have grown so large over Eurasia during the Late Saalian, we use an Atmospherical General Circulation Model (AGCM) coupled to an oceanic mixed layer and a vegetation model to explore the influence of regional parameters, sea surface temperatures (SST) and orbital parameters on the surface mass balance (SMB) of the Late Saalian Eurasian ice sheet.

At140 ka, proglacial lakes, vegetation and simulated Late Saalian SST cool the Eurasian climate, which reduce the ablation along the southern ice sheet margins. Dust deposition on snow has the opposite effect. The presence of a Canada Basin ice-shelf during MIS6 in the Arctic Ocean, does not affect the mass balance of the ice sheet. According to geological evidence, the Late Saalian Eurasian ice sheet reached its maximum extent before 160 ka. Northern Hemisphere high latitude summer insolation shows a large insolation peak near 150 ka. The simulated climate prior to 140 ka is milder and ablation is larger along the southern margins of the Eurasian ice sheet although the mean annual SMB is positive. The Late Saalian Eurasian ice sheet may have been large enough to generate its own cooling, thus maintaining itself over Eurasia. 

sted, utgiver, år, opplag, sider
Stockholm: Department of Geology and Geochemistry, Stockholm University, 2009. s. 53
Serie
Meddelanden från Stockholms universitets institution för geologi och geokemi, ISSN 1101-1599 ; 335
Emneord
Climate modeling, Eurasian ice sheet, Quaternary, Saalian, surface mass balance, SST
HSV kategori
Forskningsprogram
marin geovetenskap
Identifikatorer
urn:nbn:se:su:diva-29284 (URN)978-91-7155-914-2 (ISBN)
Disputas
2009-09-14, Laboratoire de Glaciologie et Géophysique de l'Environnement, Université Joseph Fourier, 54 rue Moliére, St-Martin d'Héres Cedex, France, 10:00 (engelsk)
Opponent
Veileder
Merknad
Joint PhD Degree between Stockholm University and Université Joseph Fourier At the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 3: Submitted. Paper 4: Submitted. Paper 5: Manuscript.Tilgjengelig fra: 2009-08-30 Laget: 2009-08-20 Sist oppdatert: 2022-02-25bibliografisk kontrollert

Open Access i DiVA

Fulltekst mangler i DiVA

Andre lenker

Forlagets fulltekst

Person

Colleoni, FlorenceJaobsson, Martin

Søk i DiVA

Av forfatter/redaktør
Colleoni, FlorenceJaobsson, Martin
Av organisasjonen
I samme tidsskrift
Geophysical Research Letters

Søk utenfor DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric

doi
urn-nbn
Totalt: 89 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf