日本地球惑星科学連合2019年大会

講演情報

[J] ポスター発表

セッション記号 A (大気水圏科学) » A-CC 雪氷学・寒冷環境

[A-CC26] アイスコアと古環境モデリング

2019年5月28日(火) 17:15 〜 18:30 ポスター会場 (幕張メッセ国際展示場 8ホール)

コンビーナ:植村 立(琉球大学 理学部)、川村 賢二(情報・システム研究機構 国立極地研究所)、阿部 彩子(東京大学大気海洋研究所)、竹内 望(千葉大学)

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

*齋藤 冬樹1小長谷 貴志2阿部 彩子2,1 (1.国立研究開発法人海洋研究開発機構、2.東京大学大気海洋研究所)

キーワード:氷年代計算

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.