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首页> 外文期刊>Journal of Glaciology >Estimation of present-day glacial isostatic adjustment, ice mass change and elastic vertical crustal deformation over the Antarctic ice sheet
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Estimation of present-day glacial isostatic adjustment, ice mass change and elastic vertical crustal deformation over the Antarctic ice sheet

机译：南极冰盖上现今冰川等静压调整，冰块变化和弹性垂直地壳变形

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摘要

This study explores an iterative method for simultaneously estimating the present-day glacial isostatic adjustment (GIA), ice mass change and elastic vertical crustal deformation of the Antarctic ice sheet (AIS) for the period October 2003-October 2009. The estimations are derived by combining mass measurements of the GRACE mission and surface height observations of the ICES at mission under the constraint of GPS vertical crustal deformation rates in the spatial domain. The influence of active sub-glacial lakes on GIA estimates are mitigated for the first time through additional processing of ICES at data. The inferred GIA shows that the strongest uplift is found in the Amundsen Sea Embayment (ASE) sector and subsidence mostly occurs in Adelie Terre and the East Antarctica inland. The total GIA-related mass change estimates for the entire AIS, West Antarctica Ice Sheet (WAIS), East Antarctica Ice Sheet (EAIS), and Antarctic Peninsula Ice Sheet (APIS) are 43 +/- 38, 53 +/- 24, -23 +/- 29 and 13 +/- 6 Gt a(-1), respectively. The overall ice mass change of the AIS is -46 +/- 43 Gt a(-1) (WAIS: -104 +/- 25, EAIS: 77 +/- 35, APIS: -20 +/- 6). The most significant ice mass loss and most significant elastic vertical crustal deformations are concentrated in the ASE and northern Antarctic Peninsula.
机译：本研究探讨了2003年10月期间同时估计本日冰川等静压调整（GIA），冰块冰块（AIS）的冰群，冰块垂直点变形的迭代方法。估计是由在空间域GPS垂直地壳变形速率的约束下，将谢思的恩典特派团和表面高度观测的质量测量结合在空间域中的约束下。活跃子冰川湖对GIA估计的影响首次通过额外的数据处理加工来缓解。推断的GIA表明，Amundsen Sea Embayment（ASE）部门的最强大的隆起主要是在阿德利特雷和东南极洲内陆的沉降。整个AIS，西南极洲冰盖（WAIS），东南极洲冰盖（EAIS）和南极半岛冰盖（API）的总AIS与全AIS的全部批准估计数为43 +/- 38,53 +/-24， -23 +/- 29和13 +/- 6 gt a（-1）。 AIS的整体冰块变化为-46 +/- 43 gt A（-1）（WAIS：-104 +/- 25，EAIS：77 +/- 35，API：-20 +/- 6）。最显着的冰块损失和最显着的弹性垂直地壳变形集中在ASE和北南极半岛。

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  • 来源
    《Journal of Glaciology》 |2017年第240期|共13页
  • 作者

    Zhang Baojun; Wang Zemin; Li Fei; An Jiachun; Yang Yuande; Liu Jingbin;

  • 作者单位

    Wuhan Univ Chinese Antarctic Ctr Surveying &

    Mapping Wuhan Hubei Peoples R China;

    Wuhan Univ Chinese Antarctic Ctr Surveying &

    Mapping Wuhan Hubei Peoples R China;

    Wuhan Univ Chinese Antarctic Ctr Surveying &

    Mapping Wuhan Hubei Peoples R China;

    Wuhan Univ Chinese Antarctic Ctr Surveying &

    Mapping Wuhan Hubei Peoples R China;

    Wuhan Univ Chinese Antarctic Ctr Surveying &

    Mapping Wuhan Hubei Peoples R China;

    Wuhan Univ Key Lab Informat Engn Surveying Mapping &

    Remote Wuhan Hubei Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 冰川;
  • 关键词

    Antarctic glaciology; ice-sheet mass balance; laser altimetry;

    机译：南极冰川冰川;冰盖质量平衡;激光高度偏移;

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