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 M (領域外・複数領域) » M-IS ジョイント

[M-IS26] 南北両極のサイエンスと大型研究

2019年5月30日(木) 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:野木 義史(国立極地研究所)、中村 卓司(国立極地研究所)、杉本 敦子(北海道大学 北極域研究センター)、杉山 慎(北海道大学低温科学研究所)

[MIS26-P04] 海水準変動予測に対する氷床-固体地球の相互作用の影響

*奥野 淳一1,2野木 義史1,2 (1.国立極地研究所、2.総合研究大学院大学)

キーワード:両極氷床、氷河性地殻均衡、海水準変動

Ice sheet, sea water, and terrestrial water storage act as surface mass loads on the solid Earth. Past and present variations of these loads make the solid Earth deform as the elastic and the viscous responses. These deformations have been clearly observed by geodetic, geomorphological and geological methods based on the field survey and the satellite measurement. To reconstruct the sea-level change associated with the surface mass changes and the solid Earth's response based on these observations, we need to apply the numerical modeling described by the Glacial Isostatic Adjustment (GIA) theory. GIA modeling results indicate that the predicted sea-level changes in any sites are spatially non-uniform because of the crustal deformation due to the GIA depending on the geometry of the surface mass loads, namely distribution of ice and water. Therefore, the precise evaluation of the GIA is vital to elucidate present and past sea-level changes. In this presentation, we show the crustal deformation derived from GIA due to present and past surface load changes and illustrate the importance of GIA component for precise projection of the sea-level change.