Last deglacial relative sea level variations in Antarctica derived from glacial isostatic adjustment modelling

查看全文 作　　者：Jun’ichi [1,2]Okuno;Hideki [1]Miura

机构地区：[1]National Institute of Polar Research,10-3 Midori-cho,Tachikawa,Tokyo 190-8518,Japan;[2]Research Institute for Global Change,Japan Agency for Marine-Earth Science and Technology,3173-25 Showa-machi,Kanazawa-ku,Yokohama 236-0001,Japan

出　　处：《Geoscience Frontiers》索引2013年第4卷第6期,共10页

基　　金：supported by JSPS KAKENHI grant numbers 23501255,21253001 摘　　要：We present relative sea level(RSL)curves in Antarctica derived from glacial isostatic adjustment(GIA)predictions based on the melting scenarios of the Antarctic ice sheet since the Last Glacial Maximum(LGM)given in previous works.Simultaneously,Holocene-age RSL observations obtained at the raised beaches along the coast of Antarctica are shown to be in agreement with the GIA predictions.The differences from previously published ice-loading models regarding the spatial distribution and total mass change of the melted ice are signifcant.These models were also derived from GIA modelling;the variations can be attributed to the lack of geological and geographical evidence regarding the history of crustal movement due to ice sheet evolution.Next,we summarise the previously published ice load models and demonstrate the RSL curves based on combinations of different ice and earth models.The RSL curves calculated by GIA models indicate that the model dependence of both the ice and earth models is signifcantly large at several sites where RSL observations were obtained.In particular,GIA predictions based on the thin lithospheric thickness show the spatial distributions that are dependent on the melted ice thickness at each sites.These characteristics result from the short-wavelength deformation of the Earth.However,our predictions strongly suggest that it is possible to fnd the average ice model despite the use of the different models of lithospheric thickness.By sea level and crustal movement observations,we can deduce the geometry of the post-LGM ice sheets in detail and remove the GIA contribution from the crustal deformation and gravity change observed by space geodetic techniques,such as GPS and GRACE,for the estimation of the Antarctic ice mass change associated with recent global warming. 关键词：相对海平面变化调整模型南极洲冰川空间大地测量技术岩石圈厚度 GRACE卫星末次盛冰期

相关文献

参考文献（71）
引证文献（3）
耦合文献（0）

参考文献(71)

引证文献(3)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Last deglacial relative sea level variations in Antarctica derived from glacial isostatic adjustment modelling

参考文献(71)

引证文献(3)

用户提示