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Semi-lagrangian Transport of Oxygen Isotopes in Polythermal Ice Sheets: Implementation and First Results : Volume 7, Issue 4 (11/07/2014)

By Goelles, T.

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Book Id: WPLBN0003977740
Format Type: PDF Article :
File Size: Pages 14
Reproduction Date: 2015

Title: Semi-lagrangian Transport of Oxygen Isotopes in Polythermal Ice Sheets: Implementation and First Results : Volume 7, Issue 4 (11/07/2014)  
Author: Goelles, T.
Volume: Vol. 7, Issue 4
Language: English
Subject: Science, Geoscientific, Model
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2014
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: copernicus

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Grosfeld, K., Lohmann, G., & Goelles, T. (2014). Semi-lagrangian Transport of Oxygen Isotopes in Polythermal Ice Sheets: Implementation and First Results : Volume 7, Issue 4 (11/07/2014). Retrieved from http://www.hawaiilibrary.com/


Description
Description: The University Centre in Svalbard (UNIS), Longyearbyen, Norway. Modelling the evolution of the Earth system on long timescales requires the knowledge and understanding of driving mechanisms, such as the hydrological cycle. This is dominant in all components of the Earth's system, such as atmosphere, ocean, land surfaces/vegetation and the cryosphere. Observations and measurements of stable water isotopes in climate archives can help to decipher and reconstruct climate change and its regional variations. For the cryosphere, the δ18O cycle in the current generation of Earth system models is missing and an efficient and accurate tracer transport scheme is required. We describe ISOPOLIS 1.0, a modular semi-Lagrangian transport scheme of second-order accuracy, which is coupled to the polythermal and thermomechanical ice sheet model SICOPOLIS (version 2.9). Model skill is demonstrated by experiments with a simplified ice sheet geometry and by comparisons of simulated ice cores with data from Greenland (GRIP) and Antarctica (Vostok). The presented method is a valuable tool to investigate the transport of any kind of passive tracer inside the cold ice part of a polythermal ice sheet and is an important step to model the whole δ18O cycle.

Summary
Semi-Lagrangian transport of oxygen isotopes in polythermal ice sheets: implementation and first results

Excerpt
Arakawa, A.: Computational design for long-term numerical integration of the equations of fluid motion: two-dimensional incompressible flow, Part I, J. Comput. Phys., 135, 103–114, 1997.; Behrens, J.: Adaptive semi-Lagrangian finite element method for the solution of the shallow water equations: implementation and parallelization, Berichte zur Polarforschung, 217, 167, doi:10013/epic.10218, 1996.; Clarke, G. and Marshall, S. J.: Isotopic balance of the Greenland Ice Sheet: modelled concentrations of water isotopes from 30 000 BP to present, Quaternary Sci. Rev., 21, 419–430, 2002.; Clarke, G., Lhomme, N., and Marshall, S. J.: Tracer transport in the Greenland ice sheet: three-dimensional isotopic stratigraphy, Quaternary Sci. Rev., 24, 155–171, 2005.; Cuffey, K. M.: Methodology for use of isotopic climate forcings in ice sheet models, Geophys. Res. Lett., 27, 3065–3068, 2000.; Cuffey, K. M. and Clow, G. D.: Temperature, accumulation, and ice sheet elevation in central Greenland through the last deglacial transition, J. Geophys. Res.-Oceans, 102, 26383–26396, 1997.; Dansgaard, W.: Stable isotopes in precipitation, Tellus, 16, 436–468, doi:10.1111/j.2153-3490.1964.tb00181.x, 1964.; Dansgaard, W., Johnsen, S. J., Clausen, H. B., Dahl, D., Gundestrup, N. S., Hammer, C. U., Hvidberg, C. S., Steffensen, J. P., Sveinbjörnsdottir, A. E., Jouzel, J. and Bond, G.: Evidence for general instability of past climate from a 250-kyr ice-core record, Nature, 364, 218–220, doi:10.1038/364218a0, 1993.; de Almeida, R. C., Costa, G. A. S., Da Fonseca, L. C. M., and Alves, J. L. D.: Particle trajectory calculations with a two-step three-time level semi-Lagrangian scheme well suited for curved flows, Int. J. Numer. Meth. Fl., 61, 995–1028, doi:10.1002/fld.1993, 2009.; Lhomme, N.: Modelling water isotopes in polar ice sheets, Ph. D. thesis, The University of British Columbia, 2004.; Forsstrom, P.-L., Sallasmaa, O., Greve, R., and Zwinger, T.: Simulation of fast-flow features of the Fennoscandian ice sheet during the Last Glacial Maximum, Ann. Glaciol., 37, 383–389, 2003.; Gat, J. R.: Oxygen and hydrogen isotopes in the hydrologic cycle, Ann. Rev. Earth Planet. Sci., 24, 225–262, doi:10.1146/annurev.earth.24.1.225, 1996.; Gornitz, V. (Ed.): Encyclopedia of Paleoclimatology and Ancient Environments (Encyclopedia of Earth Sciences Series), 1st Edn., Springer, New York, 2009.; Greve, R.: A continuum-mechanical formulation for shallow polythermal ice sheets, Philos. T. R. Soc. Lond., 355, 921–974, 1997a.; Greve, R.: Application of a polythermal three-dimensional ice sheet model to the Greenland Ice Sheet: response to steady-state and transient climate scenarios, J. Climate, 10, 901–918, 1997b.; Greve, R.: Relation of measured basal temperatures and the spatial distribution of the geothermal heat flux for the Greenland ice sheet, Ann. Glaciol., 42, 424–432, 2005.; Hoffmann, G., Werner, M., and Heimann, M.: Water isotope module of the ECHAM atmospheric general circulation model: a study on timescales from days to several years, J. Geophys. Res., 103, 16871–16896, 1998.; Hortal, M.: The development and testing of a new two-time-level semi-Lagrangian scheme (SETTLS) in the ECMWF forecast modeld, Q. J. Roy. Meteor. Soc., 128, 1671–1687, 2002.; Jean-Baptiste, P., Jouzel, J., Stievenard, M., and Ciais, P.: Experimental determination of the diffusion rate of deuterated water vapor in ice and application to the stable isotopes smoothing of ice cores, Earth Planet. Sc. Lett., 158, 81–90, 1998.; Johnsen, S. J., Dahl-Jensen, D., Dansgaard, W., and Gundestrup, N.: Greenland paleotemperatures derived from GRIP bore hole temperature and ice core is

 

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