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

作     者：Jun’ichi Okuno Hideki Miura 

作者机构：National Institute of Polar Research10-3 Midori-choTachikawaTokyo 190-8518Japan Research Institute for Global ChangeJapan Agency for Marine-Earth Science and Technology3173-25 Showa-machiKanazawa-kuYokohama 236-0001Japan 

出 版 物：《Geoscience Frontiers》 (地学前缘（英文版）)

年 卷 期：2013年第4卷第6期

页      面：623-632页

核心收录：

学科分类：07[理学] 0707[理学-海洋科学] 0705[理学-地理学] 070501[理学-自然地理学] 

基　　金：supported by JSPS KAKENHI grant numbers 23501255 21253001 

主　　题：Antarctic ice sheet Relative sea level Glacial isostatic adjustment Melting history Lithospheric thickness 

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 ***,Holocene-age RSL observations obtained at the raised beaches along the coast of Antarctica are shown to be in agreement with the GIA *** differences from previously published ice-loading models regarding the spatial distribution and total mass change of the melted ice are *** 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 ***,we summarise the previously published ice load models and demonstrate the RSL curves based on combinations of different ice and earth *** RSL curves calculated by GIA models indicate that the model dependence of both the ice and earth models is significantly large at several sites where RSL observations were *** particular,GIA predictions based on the thin lithospheric thickness show the spatial distributions that are dependent on the melted ice thickness at each *** characteristics result from the short-wavelength deformation of the ***,our predictions strongly suggest that it is possible to find the average ice model despite the use of the different models of lithospheric *** 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.