Antarctic regional ice loss rates from GRACE
Antarctic regional ice loss rates from GRACE
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DOI：
10.1016/j.epsl.2007.10.057
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发表时间：
2008-02
影响因子：
5.3
通讯作者：
Jianli Chen;C. Wilson;B. Tapley;D. Blankenship;D. Young
中科院分区：
文献类型：
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作者：
Jianli Chen;C. Wilson;B. Tapley;D. Blankenship;D. Young
利用最近改进的重力恢复和气候试验（GRACE）的时变重力解，我们估算了2003年1月至2006年9月期间南极冰质量的变化速率。数据和过滤技术的综合改进使观测南极半岛北部（AP）以及南极洲西部阿蒙森海海湾（ASE）西部和中部海岸的冰损成为可能。也有证据表明，在莫德女王地的斯坦库姆-威尔斯（STA）和尤图斯特鲁曼（jutuulstraumen）冰川附近的海岸，冰正在消失。根据有限空间分辨率、过滤和估计的冰川后反弹（PGR）的影响调整表观速率，得到北部AP、沿海ASE和STA/JUT的冰损失率分别为- 28.8±7.9、- 81±17和- 16.7±9.7 km3/yr。这是根据卫星重力数据对北半球的首次估计。ASE估计值（−81±17 km3/yr）与先前使用早期GRACE数据发布的值（−77±14 km3/yr）一致。这些结果表明，GRACE数据质量有了显著改善，空间分辨率提高，GRACE数据比以前更适用于更广泛的问题。
Using recent improved time-variable gravity solutions from the Gravity Recovery and Climate Experiment (GRACE), we estimate rates of Antarctic ice mass change for the period January 2003 through September 2006. Combined improvements in data and filtering techniques allow observation of ice loss in the northern Antarctic Peninsula (AP) and along the coast of the west and central Amundsen Sea Embayment (ASE) in West Antarctica. There is also evidence of ice loss along the coast near the Stancomb–Wills (STA) and Jutulstraumen (JUT) glaciers in Queen Maud Land. Apparent rates are adjusted for influences of limited spatial resolution, filtering, and estimated postglacial rebound (PGR) to obtain ice loss rates for the northern AP, coastal ASE, and STA/JUT of −28.8±7.9, −81±17, and −16.7±9.7 km3/yr, respectively. This is the first estimate for the northern AP from satellite gravity data. The ASE estimate (−81±17 km3/yr) is consistent with a previous value (−77±14 km3/yr) using an earlier GRACE data release. These results indicate significant improvement in GRACE data quality, increased spatial resolution, and applicability of GRACE data to a wider class of problems than previously possible.