[ meld een fout in dit record ]mandje (0): toevoegen | toon Print deze pagina
Effect of isostatic rebound on modelled ice volume variations during the last 200 kyr
Crucifix, M.; Loutre, M.F.; Lambeck, K.; Berger, A. (2001). Effect of isostatic rebound on modelled ice volume variations during the last 200 kyr. Earth Planet. Sci. Lett. 184(3-4): 623-633. dx.doi.org/10.1016/S0012-821X(00)00361-7
In: Earth and Planetary Science Letters. Elsevier: Amsterdam. ISSN 0012-821X; e-ISSN 1385-013X, meer
Peer reviewed article  
Beschikbaar in  Auteurs 
Trefwoord
    Marien/Kust
Author keywords
    glacial rebound; cycles; climate; models
Auteurs  Top 
  • Crucifix, M., meer
  • Loutre, M.F., meer
  • Lambeck, K.
  • Berger, A., meer
Abstract
    Deformation of the lithosphere under an ice load can be approximated using the hypothesis of local damped isostasy. This simple formulation has been systematically compared with a three-dimensional model of the crust-mantle system for simple ice-load scenarios with a period in the range 20-100 kyr. The comparison enables us to introduce the concepts of effective upper mantle density and effective relaxation time into the isostatic model for the response of the Earth to the ice sheets. These parameters depend on the Earth model considered, ice sheet size and the period of the load cycle. The local damped isostasy model has been implemented in the Louvain-la-Neuve climate model to assess the impact of isostasy on continental ice volume variations for the last 200 kyr. Results suggest that isostasy acts as a negative feedback for ice volume during the glaciation process and acts as a positive feedback during the deglaciation. Moreover, taking isostasy into account is necessary to simulate variations in Northern Hemisphere ice volume during isotopic stage 3. Lastly, the use of effective mantle density and effective relaxation time improves the model performance regarding SPECMAP reconstructions.
Alle informatie in het Integrated Marine Information System (IMIS) valt onder het VLIZ Privacy beleid Top | Auteurs 
IMIS is ontwikkeld en wordt gehost door het VLIZ.