Cel To construct a new Reduced Model - a system of partial differential equations - which describes the dominant thermomechanical balances governing the flow of a large ice sheet, which incorporates the anisotropy induced by the evolution of fabric (realignments of crystal axes) as ice descends to depth. Samples from deep ice cores will be examined to establish the distinct shear responses on planes at different inclinations, and deduce the dominant shear planes and their normal axes. Numerical simulation of the deformation of a polycrystal aggregate with initially random distribution of axes will be performed to observe the evolution of axes realignments, and infer dependence on stress and deformation. Frame indifferent constitutive laws, which incorporate structure evolution to model observed behaviour, will be constructed. Within the project the new laws will be incorporated into the mass, momentum and energy balance of a gravity driven ice sheet flow, and investigation of simplifications achieved by co-ordinate stretching to reflect the large aspect ratios will be done. The reduced models will be applied to idealised flows to illustrate the effects of fabric, and to specific examples of current ice sheet configurations. Dziedzina nauki natural sciencesmathematicspure mathematicsmathematical analysisdifferential equationspartial differential equationssocial scienceslaw Program(-y) FP4-ENV 2C - Specific programme of research and technological development in the field of environment and climate, 1994-1998 Temat(-y) 010102 - The climate system in the past Zaproszenie do składania wniosków Data not available System finansowania CSC - Cost-sharing contracts Koordynator UNIVERSITY OF EAST ANGLIA Wkład UE Brak danych Adres University Plain NORWICH Zjednoczone Królestwo Zobacz na mapie Linki Strona internetowa Opens in new window Koszt całkowity Brak danych Uczestnicy (4) Sortuj alfabetycznie Sortuj według wkładu UE Rozwiń wszystko Zwiń wszystko CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE Francja Wkład UE Brak danych Adres Rue Molière 54, Université de Grenoble 1 38402 SAINT-MARTIN-D'HERES Zobacz na mapie Koszt całkowity Brak danych Centre National de la Recherche Scientifique Francja Wkład UE Brak danych Adres 14 avenue Edouard Belin 31400 Toulouse Zobacz na mapie Koszt całkowity Brak danych NERC British Antarctic Survey Zjednoczone Królestwo Wkład UE Brak danych Adres High Cross Madingley Road CB3 0ET Cambridge Zobacz na mapie Koszt całkowity Brak danych Technische Hochschule Darmstadt Niemcy Wkład UE Brak danych Adres 1,Hochschulstrasse 64289 Darmstadt Zobacz na mapie Koszt całkowity Brak danych