Japan Geoscience Union Meeting 2019

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[J] Poster

A (Atmospheric and Hydrospheric Sciences ) » A-CC Cryospheric Sciences & Cold District Environment

[A-CC26] Ice cores and paleoenvironmental modeling

Tue. May 28, 2019 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall8, Makuhari Messe)

convener:Ryu Uemura(University of the Ryukyus), Kenji Kawamura(National Institute of Polar Research, Research Organization of Information and Systems), Ayako Abe-Ouchi(Atmosphere and Ocean Research Institute, The University of Tokyo), Nozomu Takeuchi(Chiba University)

[ACC26-P06] Performance of RCIP scheme on 1-d age computation of ice sheet.

*Fuyuki SAITO1, Takashi Obase2, Ayako Abe-Ouchi2,1 (1.Japan Agency for Marine-Earth Science and Technology, 2.Atmosphere and Ocean Research Institute, University of Tokyo)

Keywords:Ice core dating simulation

Generally the evolution of ice-sheet thickness, temperature and age in an ice-sheet model are formulated using the transport or advection equation. There are many variation of the formulation, which differ in numerical aspects such as stability, accuracy, numerical diffusivity, conservation and/or computational costs.
Rational Constrained Interpolation Profile scheme (RCIP, Xiao et al. 1996) is a variation of semi-Lagrangian scheme, which has properties in suppressing numerical oscillation and diffusion near large gradients.
In this study, RCIP scheme is implemented on 1d age computation of ice sheet, which is a typical numerical study of ice-core related topics. Comparison with the results of RCIP scheme and those of classical upwind scheme shows that the former keeps fine information (i.e., surface mass balance) recorded at the deposit.